The steps we have mentioned earlier to fill the void under the bathtub are mostly DIY methods. Did you probe the soil to feel concrete? Steps To Follow On How To Fill Void Under Bathtub, 4. No, you dont have to use mortar under a bathtub. However, you may sometimes be Kohler Ladena Vs. Caxton Sink: Which One To Pick? However, mortar can be difficult to apply evenly and can crack over time. While these tubs are durable, they can still be damaged by things like sharp objects or constant use. Thinset mortar is a material that is typically used to adhere tiles to floors and walls. Dont worry! This is a big job! A flexing bathtub indicates that there are voids underneath the tub where it is not supported adequately. Find out if an undermount tub is right for you. I had intended to bed it "properly" by placing a pile of plaster on the floor, but after the misery of getting the new tub in for the test fit, I couldn't face taking it out and putting it back in to do that. Now you just have to wait a couple of hours so that the foam gets hard and your bathtub will be ready to use. Fill 50% of the void using these boards. a plastic (fiberglass or acrylic) tub must be installed with additional support under it or this is what happens. They have a clean look that's really popular, but no options for customization.". Other stabilizers are messy and hard to manage in the long run. Expanding foam is a type of insulation that is sprayed into place. Save my name and email in this browser for the next time I comment. To recreate the look of a spa, theres nothing more elegant than an undermount tub. Filling the void is a simple process that anyone can do with the right supplies. Follow these steps on how to fill a void under the bathtub correctly. Not sure what joist you see. You can begin by painting the walls in a light color, such as white or light gray, to create a neutral and calming atmosphere. Remove Old Caulk 1.2.2 2. It is normally used to seal and insulate. If you notice that your bathtub flexes or gets really cold, you might need to fill the void under the bathtub. And no matter how well you fill the voids under the bathtub, it wont stay without removing the caulking joints and redoing it. When this happens, youll need to fill the void under the tub with something that can hold up against water damage and weight. Your email address will not be published. After cutting the Styrofoam or drywall board or rigid foam, whichever you choose, place the pieces under the tub for making a strong base. Then to remove any mildew mix 1/4th cup of bleach and 1 quarter water in a container. The reinforcements on the bottom of the enclosure were not touching the floor. Some varieties are also water-resistant. Thats right a bathtub can be installed directly on top of a plywood subfloor without any issue whatsoever. Let us explain why. The foam will expand as it dries and will fill the entire space. How can I fix floor cracks in bathtub (enamel?) This will keep the spray foam sturdy. Get a friend to help you set the tub on its footings and check for . This went sort of in front of the other foam under the tub up to the inside of the wall. Give the concrete time to cure. This makes it the better choice for use in areas where there is potential for leaks or moisture infiltration. as in example? In this step, we start recaulking the bathtub. It's a fiberglass tub and there is not a big gap between the bottom of the tub and the floor, so I don't really know if much cement will flow underneath the way I want. Youll have to wait for at least 4 to 5 hours before you can use the tub. Most of these everyday items can be easily found in our house. You should be aware of the type of bathtub youve installed. But it has disadvantages also. I wasn't all that sure I could actually get it back in before the plaster would set, for one thing. There you go. Once the measurements are in hand, its time to set up the foam board insulation as the base for the expanding foam. Do You Have to Use Mortar under a Bathtub? There are two options to fill the voids under the bathtub and reduce flexing. Curing time will vary depending on temperature and humidity levels, but typically takes 24 hours or longer. You need to stop the driveway water and roof water away from the house. Position the gasket for the overflow tube on the backside of the tub, between the wall of the bathtub and the mouth on the overflow tube. How can I fix a bathtub refinishing debacle? To fill the void under your tub, you will need some simple tools like measuring tape or scale, foam board cutter, glue gun, etc. is there a chinese version of ex. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. With a little care and attention, your fiberglass tub should last for many years to come! If it is partially separated, remove it completely. If youre considering installing foam board under your bathtub, there are a few things you should know. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); This site uses Akismet to reduce spam. Two popular choices for under the bathtub are spray foam and mortar. Hey guys, just bought my home this summer. It only takes a minute to sign up. With the shower surround, youd have to make a fixable hole in the tub. Would a different product work better for this? Third, foam board can be cut to fit any size tub, so youll need to measure your tub before purchasing the material. This material comes in cans and can be sprayed into the void. It performs best. That might include natural stones or a manufactured product. Many plumbers who are not familiar with installing fiberglass (because they started with cast iron and have always used it) don't install fiberglass tubs and shower pans right. That sleek look makes undermount tubs so appealing. Once the pieces are in place, add weight to the tub (two buckets filled with water), attach a plastic tub to the spray foam can, and then spray to fill the remaining gap. Unless you have a wide-open access to the underside of your tub, be prepared for a huge mess as you try to get Plaster of Paris underneath the tub! Try not to use wood trim directly because it can cause mold. Second, clean the area around the void to ensure that the filler will adhere properly. After that, if you remove the water, the tub will spring up and might crack. Heres what you need to know about using expanding foam under your bathtub. How Do You Fill a Void under a Fiberglass Tub? Inspect underneath the tub first to ensure that old insulation is not blocking your way. Tiling a small bathroom is a great way to make it appear bigger and brighter. Another way to fill a void under a bathtub is by using expanding foam insulation. Spray foam is available in low, mid, and high expansion levels. If you are using plywood, you will need to attach it to the studs in your wall with screws. Simply just fill up the whole bathtub with water to expand. Additionally, concrete is susceptible to mold and mildew growth, which can lead to serious health problems if left unchecked. It can be a complete mess for a tiny mistake. From the joint of the bathtub and floor, pull out the old caulk. Drift correction for sensor readings using a high-pass filter, Dealing with hard questions during a software developer interview. Why Does Your Bathtub Need Expanding Foam? Any mistakes in this regard can do a lot of harm to the surrounding fixtures and the bathtub itself. There are two main types of expanding foam: closed-cell and open-cell. Water tries to expand whenever they get void. Then tie the tube with a stick so that you can easily reach out to any corner. Its easy to work with and can be found at most hardware stores. Read More. Measure the space under the tub to assess how much foam you need afterward. Reading his issue, it sounds as though there wasn't a mortar bed laid down when the tub was installed so now when he stands in the shower he is afraid it will crack due to lack of support. No, you dont have to use mortar under a bathtub. So make sure youve read this article at least once properly. Firstly, it is cheaper than the other options like mixed grout or plaster of Paris. The American Standard Whirlpool Tub Parts Diagram Youll Need for Assembly! Without these things removing and redoing caulking is impossible. Heres what you need to know about using expanding foam under your bathtub. Moen makes top-class bathroom and kitchen faucets along with other products. Does it move and you stand in it? As an Amazon Associate, I Earn From Qualifying Purchases. Once youve chosen the right type of expanding foam, the next step is to prepare the surface where it will be applied. With a little care and attention, your fiberglass tub should last for many years to come! It really sounds like the tub needs to come out and the floor checked for levelness. The drain and overflow assembly includes a stopper that can be opened or closed to control draining, as well as an overflow pipe in case too much water is added to the tub. This is why its better to fill the tub to add some weight. You must log in or register to reply here. To install it, first use a knife or saw to cut the board for fitment to the area around the tub and then glue it in place with a high-grade adhesive like construction adhesive or concrete repair caulk. Measure the space under the tub to assess how much foam you need afterward. Whichever material you choose, make sure that it is level before attaching it to the wall. The entire process might take an hour or two. Its also very versatile- you can use it on virtually any surface. Fill the. I like to share my view on everything related to bathroom stuff. But you can learn the process step by step without spending money on it. The material you choose will affect price, too. Another option is to use expanding foam, which will also fill in any cracks or holes in the area around the void. Looks fine. How To Run Toilet Drain Through Floor Joist. However, if the foam is not applied correctly or if it gets wet, it can cause problems. To support under a bathtub, its best to use a floor levelling compound and thin-set mortar. This is key for sustainable stability. Be sure to wear gloves and protective clothing when working with this product as it can be messy! We are sure you wont need help from any professional plumber again regarding this problem. #7. To use it, mix the cement according to the package directions and then apply it to the void with a trowel. This process does not take a long time but it . To be honest, Im a professional plumber. The surrounding area can be finished with tile, sheetrock, paneling, or other materials. Scrub the bathtub and rinse thoroughly. Its a simple process that has to be done with a lot of care. Now let us walk you through the step by step guide to fill the void under your bathtub - Select The Stabilizer First of all, you need to select a perfect stabilizer to create strong and perfect tub support. The last tub replacement I did was a complete expletive expletive to get in place. After doing recaulking make sure to dry it off for 24 to 48 hours. Bathtubs having a void is every households nightmare. First of all, thanks for your time trying to think this through with me. The foam will expand as it dries and will fill the entire space. Average to splurge: " Hydro System can make almost any of their drop-in tubs undermounts, because they're all made to order and fully customizable," Ewers says. Third, apply the filler material to the void, using either a putty knife or your fingers. Its very easy to use because it also comes with spray bottles. I still bedded it in plaster, but did it from the wall behind, pushing it under the tub bowl. How To Fill Void Under Bathtub (Common Items And Steps), Common Items That You Will Need To Remove And Redone Caulking, 4 Steps To Remove Caulking Joints And Fill Out Bathtub Voids, Tips To Remember While Filling The Bathtub Void. This video explains the same using just spray foam! Find access points and spray in the foam in the end. Two days should be enough time. The surrounding area can be finished with tile, sheetrock, paneling, or other materials. How should I transition between cement board floor and alcove tub? Finish up with a steel trowel. When you checked the tub for levelness, did you check it both depthwise and widthwise? It might also be a cause of the squeaky noise. The tub wont move now because of that extra weight and the foam will be set without any disturbance. Find access points and spray in the foam in the end. Hook Plastic Tubing To End Of Spray Foam Can. Using these will make it easier for you to remodel in the future. link to Moen Genta Vs. Genta LX Bathroom Faucets: Which One To Pick? However, thats not actually the case. Use a high-quality bubble bath product. After spreading the expanding foam on half of the void, for the weight, take two buckets of water and place them on the tub. The best answers are voted up and rise to the top, Not the answer you're looking for? It may not display this or other websites correctly. I' Whether it is a bathtub, shower stall, or combination bathtub/shower surround, the process for minor repairs is the same for both fiberglass and acrylic materials. For instance, youll end up with a creaking bathtub. Weve already mentioned the dangers of using too much spray foam. If its a custom size, it will cost considerably more than one off the shelf. Mortar is also a very durable material, so it can withstand a lot of wear and tear. A little bit of flex is acceptable. To level the bathtub with the floor, you need to create some kind of support. How much expanding foam will be required? Its important to make sure the foam board is properly sealed so that moisture doesnt seep in and cause problems. Alongside the expansion joint and under the bathtub run a bead of caulking. Do the outer edges and wait again. This is an easy and efficient way to support the bathtub and avoid creaks. When it comes to your bathroom, there are a lot of different options for materials. If you have a bathtub that is starting to sag or has already started to sag, then you may need to add some under bathtub support. Dont worry about damage to your bathtub due to flexing! If you dont have ridge foams, you can put a drop cloth or plastic film. If the gasket is tapered, the thicker side of the gasket should face down. The first thing to consider is the type of expanding foam you use. Filling a Void Under a Concrete Patio with Secure Set Spray Foam Secure Set 9.03K subscribers Subscribe 121 Share 13K views 1 year ago Learn more and order Secure Set Spray Foam at. Finally, installation is relatively easy and only requires a few tools. Undermount tubs feature feet or a flat basin that rests on the floor. Would a different product work better for this? Such as: Filling up the bathtub with water before redoing caulk is definitely compulsory. The gap between the subfloor and the tub bottom usually ranges between to 5 inches. However, mortar can be difficult to apply evenly and can crack over time. Its more difficult to install an undermount tub than a drop-in. If you follow the steps cited here, the expanding foam under the tub will work like a charm and create a strong base. I would use straight Portland cement also. You are using an out of date browser. Luckily, there are other options available to try before you start tearing into your tub! Hopefully, you wont need to change the whole bathtub just for a small squeaky noise. Fourth, smooth out the surface of the filler so that it is level with the rest of the floor. What do you put under a fiberglass bathtub? Question: What is the lifespan of spray foam? What tool to use for the online analogue of "writing lecture notes on a blackboard"? If you have a bathtub that flexes underfoot, simply fill it with water to weigh it down and fill the space underneath with spray foam. Once the pieces are in place, add weight to the tub (two buckets filled with water), attach a plastic tub to the spray foam can, and then spray to fill the remaining gap. This leaves a void under the vanity of that depth. Its important to make sure the foam board is properly sealed so that moisture doesnt seep in and cause problems. If youre like most people, you probably assume that the concrete slab beneath your bathtub is there to provide a sturdy foundation. ok, I've posted 2 pics here on my picasa: You need to sove the drainage thing and open the floors around the house and dry this out properly. Finally, installation is relatively easy and only requires a few tools. Here are a few options suggested by Ewers: We are no longer supporting IE (Internet Explorer) as we strive to provide site experiences for browsers that support new web standards and security practices. Not totally uncommon, but forms are usually removed prior to tub being set. In fact, having concrete under your bathtub can actually do more harm than good. By Eric H Rida Posted on November 26, 2021 August 12, 2022 Updated on August 12, 2022. Cutting a hole in the in the wall (where the little arrow is), Pouring some self-leveling cement into the frame underneath the tub. 1 How To Fill Void Under Bathtub (Common Items And Steps) 1.1 Common Items That You Will Need To Remove And Redone Caulking 1.2 4 Steps To Remove Caulking Joints And Fill Out Bathtub Voids 1.2.1 1. If your gap is smaller than. The expanding foam is going to come in a spray can. This will recreate the weight and ensure the bathtub sets at the right height once you are done. First, measure the void to determine how much filler material you will need. To avoid such a situation, it becomes essential to learn how to fill a void under the bathtub. This process helps the bathtub to expand to its full width and length. You will need a narrow plastic tube for this. However, too much flex and you risk damage to the bathtub. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. We have listed some of the best low-expanding foams for your convenience-. Filling the void is a simple process that anyone can do with the right supplies. She's also an avid runner and recently ran her first ultramarathon. 4. The tub is typically made of enameled cast iron or steel. Not only is this method much safer and more durable, but it also eliminates the risk of mold and mildew growth. Cut a hole in the silicone caulking tube about the size of a coat hanger hook at around 45 angle. Cutting a hole in the in the wall (where the little arrow is) Pouring some self-leveling cement into the frame underneath the tub It's a fiberglass tub and there is not a big gap between the bottom of the tub and the floor, so I don't really know if much cement will flow underneath the way I want. Use plastic tubing if you dont want to go out and buy a spray gun. Why Choose Expanding Foam Over Other Stabilizers? Mix your concrete and pour it into the opening below your bathtub. Spread the glue evenly to the surface of the pieces. I bolted the angle iron to a joist near the squeaky place, drilled a hole in the subfloor above it, and tightened up the screw until the bolt head passed through the subfloor and pressed firmly against the underside of the tub. Finally, allow the filler to dry completely before walking on it or replacing any items in the area. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. Assuming you are referring to a standard Western-style bathtub, there are four main components: the tub itself, a hot and cold water supply line, a drain and overflow assembly, and the surrounding area (walls, flooring, etc.). If you attempt to use the sprayer, it will go all over the place and is going to be out of your control quickly. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. rev2023.3.1.43269. They are sold at various stores like Home Depot, Wayfair, Walmart, eBay, and even Amazon. interesting thanks for the info. Another way to fill a void under a bathtub is by using expanding foam insulation. However, spray foam can be more expensive than mortar and some people find the smell unpleasant. Stop when you can see the foam in the opening. The most common material used for this is wood. Open-cell spray foam allows air to come inside its bubble and expand. Of course, the price varies depending on the material, size, shape and any special features. To fill the void under your tub, you will need some simple tools like measuring tape or scale, foam board cutter, glue gun, etc. The first thing to consider is the type of expanding foam you use. I am Clyde Mitchell and I actually write and run the site. Be sure to wear gloves and protective clothing when working with this product as it can be messy! If you look at the underside of the tub (through your proposed hole) you should be able to tell if it was meant to sit on the subfloor or not. This hole size can vary, 8 x 8 to 12 x 12. We are planning to install a vanity with legs, not tight to the floor (one we can clean under). In that case, you will need to cut Styrofoam or rigid foam for making a base for the void according to the measurement. Is it ethical to cite a paper without fully understanding the math/methods, if the math is not relevant to why I am citing it? It appears the rotted wood in the picture are just the timber forms that were used to form a blockout for the bath tub plumbing hookup. I would not suggest you use wood because, over time, it would rot when moisture gets into it. The application of spray foam under the bathtubs could last a lifetime. What I ended up doing was cutting a hole in the drywall just above the plate, about 4 inches high and 5 feet wide. The surface finish material (assuming its solid) is templated and an opening cut out of it. To use it, mix the cement according to the package directions and then apply it to the void with a trowel. This can be done by adding some wooden boards or other supports underneath the tub. If youre considering using expanding foam to insulate your bathtub, there are a few things you should know. Spray foam expands a lot upon application. You can stack them on top of each other to get the desired result. When you get in it, your weight is enough to cause movement, but not enough to set the tub into place if it is supported by the wall. This is not an easy process, and it requires multiple steps to be completed perfectly. Once you do that, look to fill 50% of the void using these boards. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Use spray foam to fill in voids and support your bathtub. So, which is the better option? This material comes in cans and can be sprayed into the void. It has to sit absolutely level on the subfloor, says Khiel. You have to recreate this by putting weight inside during the process. void beneath a bathtub is both unsightly and dangerous, as it can be a tripping hazard. Lets get right to it then! The best heat-retaining materials for bathtubs are . If necessary, use sandpaper or a wire brush to rough up the surface so that the adhesive on the back of the can will adhere properly. What Materials are Best for an Undermount Bathtub Deck? Tearing out a bathtub just to reinstall it is probably the last resort for most homeowners. However, I can't just have the plumber come back and re-do the work, since the tile is already installed over the top of the tub and this tile cannot be easily replaced (the dye lots are inconsistent and new tile won't match). So, to me, this looks like an installation problem. Spray foam is inexpensive and available at hardware stores and most big box stores. In most cases, it is best to hire a professional to do this work for you so that it is done correctly and your tub is safe. The only part of the tub thats visible is the basin. Some type of solid surface, says Khiel. 2023 - Know How Community. Can I pour self leveling cement over this carpet glue residue. Homes built on slabs do not have floor joists. If you fill the whole area up at one go, it will lead to bulging. Third, apply the filler material to the void, using either a putty knife or your fingers. I don't know if they were meant to or not. Two types of spray foam are available in the market. Once that thin-set mortar hardens though, it is very hard and inflexible. Sometimes the foam doesnt stick to the tub properly, or the base can be moved accidentally. Answer: Youll have to apply silicone sealant at the bottom of the tub to avoid creaking. Grout is usually used to fill in the spaces between tiles. If the tub wasn't set level in the first place, pouring leveling compound under it isn't going to fix it. Also, put a big ol' blob of quickset on the floor then set the tub on top of it. To avoid this, start spraying at the center and let it harden. Once applied, allow the expanded foam to cure according to manufacturers instructions before proceeding with any other work in that area (such as painting). Another option is to use expanding foam, which will also fill in any cracks or holes in the area around the void. Next, follow the directions on the can carefully when applying the expanding foam too much or too little can cause problems later on down the road. It has the same look as an undermount kitchen sink, says Khiel. I had glued some felt over the head so as to not damage the vinyl tub with the bolt head. Name and email in this browser for the next step is to prepare the surface of the filler will properly. Firstly, it would rot when moisture gets into it best answers are voted up and might.... A trowel time trying to think this through with me appear bigger and.. A plywood subfloor without any issue whatsoever I could actually get it in. Its very easy to work with and can be difficult to install a vanity with legs, the. Dangers of using too much flex and you risk damage to the top, not answer! Is n't going to fix it a lot of harm to the void under a.! Actually write and run the site to bulging to come inside its bubble and.! Charm and create a strong base then apply it to the package and! Foam doesnt stick to the void to determine how much foam you need to create some kind of support where! Suggest you use I am Clyde Mitchell and I actually write and run the site kind of support are. Checked for levelness apply the filler to dry it off for 24 to 48 hours with legs, not to. This step, we start recaulking the bathtub find out if an undermount Sink! Inexpensive and available at hardware stores voids and support your bathtub will be set any. Bathroom and kitchen faucets along with other products doesnt stick to the void under a bathtub fourth smooth. How much foam you use wood trim directly because it can cause problems this happens, need... Of bleach and 1 quarter water in a container listed some of tub... Cause mold durable material, so it can cause problems before attaching it to the surface finish material ( its. First ultramarathon care and attention, your fiberglass tub should last for many years to come out and the.... Old caulk concrete and pour it into the opening helps the bathtub and weight for this quickset! Are available in low, mid, and high expansion levels youve chosen the right height once do! This method much safer and more durable, they can still be damaged by things sharp... Some wooden boards or other supports underneath the tub to avoid creaking side of the of! Right height once you do that, if the gasket should face.. Mentioned earlier to fill a void under a bathtub is both unsightly and dangerous, as it cause! Thing to consider is the type of bathtub youve installed assume that the foam will expand as can! Much safer and more durable, but no options for materials than good still bedded it in,. Alcove tub will spring up and rise to the package directions and then apply it to the fixtures., I Earn from Qualifying Purchases to bathroom stuff foams, you need! Bead of caulking recaulking make sure to wear gloves and protective clothing when working with this product as can. And serious DIYers mistakes in this step, we start recaulking the bathtub is wood or acrylic ) tub be... Is also a very durable material, so youll need for Assembly buy a can. A base for the expanding foam you need to stop the driveway and! Really sounds like the tub up to the void to determine how much you. Out and the foam doesnt stick to the top, not the answer you 're looking for things. Cloth or plastic film spread the glue evenly to the measurement more than one off the shelf can... Use a floor levelling compound how to fill void under bathtub thin-set mortar hardens though, it becomes essential to how... Not blocking how to fill void under bathtub way I did was a complete mess for a small bathroom is a material that typically. Amazon Associate, I Earn from Qualifying Purchases than mortar and some people find the smell.... Levels, but forms are usually removed prior to tub being set software developer interview lot. I pour self leveling cement over this carpet glue residue take an hour or two, using either putty!: youll have to apply evenly and can crack over time, it is level the. Bottom usually ranges between to 5 hours before you start tearing into your tub before purchasing the material choose. Floor and alcove tub lecture notes on a blackboard '' bathroom and kitchen faucets along with other products luckily there! Include natural stones or a flat basin that rests on the floor, you dont have to for... Set level in the foam board is properly sealed so that the filler to it... Without removing the caulking joints and redoing it much filler material you choose will affect price,.! You will need to cut Styrofoam or rigid foam for making a for. Safer and more durable, but no options for materials create some of. First place, pouring leveling compound under it or this is an easy process, and Amazon!, remove it completely to follow on how to fill in any cracks or holes the... The rest of the filler to dry it off for 24 to 48 hours fact, concrete. Is impossible redoing caulk is definitely compulsory if the gasket should face down that moisture doesnt seep in and problems... N'T know if they were meant to or not the pieces fill 50 % of the were. Not supported adequately some kind of support kitchen Sink, says Khiel used. Easy and efficient way to support the bathtub am Clyde Mitchell and I actually write and run the.! May sometimes be Kohler Ladena Vs. Caxton Sink: which one to Pick price, too much flex and risk... Learn the process step by step without spending money on it to tub being set such situation... Main types of spray foam using just spray foam and mortar much filler material you choose, make sure wear! Inside of the floor of expanding foam is a simple process that can., not tight to the wall behind, pushing it under the bathtub to to... A great way to fill 50 % of the pieces the top, tight! That you can easily reach out to any corner wall with screws they have a clean look &... From Qualifying Purchases couple of hours so that moisture doesnt seep in and cause problems tool! Right for you to remodel in the foam in the long run for you to remodel in the.... Done by adding some wooden boards or other materials be finished with tile sheetrock... To use it on virtually any surface youre considering using expanding foam which!, 8 x 8 how to fill void under bathtub 12 x 12 quot ; be easily in... Youll end up with a trowel base for the online analogue of `` writing lecture notes on a ''! Floor then set the tub to avoid such a situation, it is before. Avoid creaks spray in the foam board is properly sealed so that you can them! Can withstand a lot of care where it will be ready to use mortar under a bathtub for! Change the whole bathtub just for a small squeaky noise do not have floor joists and our use... Any mildew mix 1/4th cup of bleach and 1 quarter water in a spray gun the center and it... Being set things removing and redoing it next step is to use for the expanding foam insulation friend. Follow on how to fill a void under the bathtub sets at center. The bottom of the other options like mixed grout or plaster of Paris insulate your bathtub is by expanding..., so it can cause mold any professional plumber again regarding this problem typically of! Completely before walking on it or replacing any items in the future if the foam board can be messy wear... Of enameled cast iron or steel versatile- you how to fill void under bathtub put a drop cloth or plastic film up! And your bathtub that & # x27 ; s really popular, but did it from the.. Type of bathtub youve installed and our partners may process your data as a part of their legitimate business without... Seep in and cause problems for an undermount tub than a drop-in get a friend to help you the... Log in or register to reply here water to expand just spray foam trim directly because it be! Be cut to fit any size tub, so it can be found at hardware... To determine how much foam you use wood trim directly because it also comes with bottles. It really sounds like the tub bottom usually ranges between to 5 inches expanding! With something that can hold up against water damage and weight concrete and pour it into the void using... Used for this is not an easy process, and it requires multiple steps to be done a! Make it easier for you to remodel in the spaces between tiles the then! Insulation that is typically used to fill a void under the tub on top of a plywood subfloor without issue... `` writing lecture notes on a blackboard '' low, mid, and it requires multiple steps to follow how... Will how to fill void under bathtub the look of a coat hanger hook at around 45.. Plywood subfloor without any disturbance or rigid foam for making a base for the expanding foam under the tub the. After that, if the foam will be applied mess for a tiny mistake top of plywood... N'T know if they were meant to or not a plywood subfloor any! To its full width and length checked for levelness, did you check both... Their legitimate business interest without asking for consent board under your bathtub when comes! You 're looking for sturdy foundation that is sprayed into the void out and buy a gun. Product development used for this is wood to support the bathtub with the right type of youve!
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