Sep 17, 2018 tile backer board may be drywall or cement board. Fibatape cement board tape howto install cement board tape. Unlike sheetrock, the edges of the cement board in this case, hardibacker arent beveled at all. We utilized the same thinset that will be used to attach the tiles. This is a distinct advantage over plywood and drywall. In this video, i show you how to tape cement board joints. If you are going to tile over the cement board, you should tape the seams. Durock, a name brand cement board manufactured by usg corporation and sold throughout the united states, is suitable as a backer board for tile.
Waterproof bathtub walls with redgard easy as painting walls. This article describes repair procedures for cosmetic or functional siding issues that may arise such as loose siding, winddamaged siding, siding paint or coating failures, and siding gaps, especially gaps at fiber cement siding butt joints where lap siding is installed. While it is sometimes necessary to remove an entire fiber cement plank from a wall, for the purposes of this article we will assume that the homeowner wants to patch a relatively small area and not remove and replace. In your case, you can use a diamond saw on a 4 12 grinder, cut a nice square or whatever shape you desire out around the offending area, cut a block to fit it a piece of azek board is a decent choice, drill a hole just over the size of gas pipe, then slice the block in half through the hole then slip the two halves. If you encounter a peakvalley problem between cement boards and drywall use lightweight settingtype joint compound to level the transition. The hardest part of a cement board installation is carrying it to the worksite. Our page top photo shows loose and improperly installed fiber cement siding on. These sheet goods are made with a mixture of portland cement. Usg durock cement board panels should not be used in areas where they are exposed to temperatures that exceed 200f. Most cement board manufacturers will permit you to use nails or screws to attach the material to framing. The lower part will be properly done with cement board and waterproof coating.
Water and vapor can pass right through it, just like with other cement based materials. Mar 07, 2017 in this video, i show you how to tape cement board joints. Cement board is moisture and mold resistant, and it doesnt deteriorate or warp in the presence of water. Cement board comes in 3by5 foot sections and installs similarly to drywall. How to apply joint compounds to durock cement boards ehow. I used a mesh tape for high humiditymoisture areas, which comes as a roll with an adhesive side, and sheet rock joint compound, not thinset, for the gaps, screw holes and seams on the cement boards. In this video i show you how to tape and fill cement board jointsboth cross joints and the beveled joints. Aug 21, 2012 this is especially true at the seams between two cement board panels or a cement board panel and existing drywall. Its a lot easier to work with preformed cement board rather than laying a bed of mortar on the job site, and it still carries the same great qualities.
Cement board often is called waterproof or waterresistant, but neither description is accurate. While even the best caulk will eventually succumb to your beadboard expanding and contracting, using a quality caulk to seal the cracks and seams is a good mediumterm fix. In the past, when ive done this, i had a rough time getting a relatively flat surface. There are some aspects of tile installation that seem small or insignificant but they arent. If you decide to use screws, make sure you keep the screw heads flush with the cement board surface. The acrylic modifiers in truefoam pargeplus makes it very well suited for the thin coatings that are typical of parging applications.
Embed the cement board and screw it to the underlayment with special 114 in. It is a very simple process and i used some fibatape and thinset mortar to seal the. Cement board, available in 4foot by 8foot panels, is standard for use as a tile backer board. I am just advocating taping cement board joints, esentially the way the manufacturer reccomendswith fiberglass mesh tape and thinset or if you want it smooth with a super fine cementitious skim coating and patching product. Allow the patch to thoroughly dry and apply another thin layer of patching material if the first layer shrank during the drying process. Manufacturers caulk and sealant recommendation sheet s100b. Then spread thinset mortar with the flat side of a 14in. The primary benefit of cement board is that it doesnt break down or expand or warp if it gets wet.
Jan 12, 2016 im not crazy about the idea of using kerdi band over cement board seams with redgard. Before you can replace either material, you have to expose it by removing tiles. Cement backer board was developed first to replace the cement mud and metal lath systems installed by real craftsmen. Not the mesh tape in the drywall section of the big orange box.
This tape needs to be applied to every area where the cement board panels butt against each other or other sections of drywallplaster. Taping cement board jointsstep by step tutorial youtube. Adding selfadhesive alkali resistant fiberglass tape to all the cement board seams is a really important step. I always block out for penetrations, for bases for light fixtures, etc. Oct 14, 2019 from small dents to large holes, there are several ways to fix surface defects on your walls. Hardiebacker is a cement board available for use with ceramic tile installations and is a very durable underlayment. In addition to attaching it to the floor, you also need to fix the seams between the boards with tape. Mix vinyl patching compound as directed by the manufacturer and trowel the compound into the area to be repaired. Embed hardiebacker cement board firmly and evenly in the wet mortar. A few years ago we were headed on a little family vacay, it seemed a million things needed to be done before we could get out of town. How to install cement board for tile projects family handyman.
They are easily attached with rust resistant roofing nails or galvanized screws. Certainly the board should be flush at its face with any adjacent. Use a 6inch drywall taping knife to spread drywall joint compound across the patch and tape to create a smooth, flat surface. How to install cement board on a floor the family handyman.
Tile backer board now comes in all different types from cement to specialized gypsiumcore products that are faced with fiberglass. But for a tub or shower, you need to begin with a cement backer board base, because the tile will be constantly wet. Truefoam pargeplus is recommended for parging over rigid foam insulation. So i installed the cement board flush with the lip of the tub because thats how the framing wasie i couldnt have overlapped the tub lip. It is a type of cement, similar to mortar, that sets extremely fast and hardens after it has been mixed with water. Drive screws every 68 inches once the backerboard is in position. Next, youll tape the seams of the backer board, and apply a waterproofing sealer to the surface before you begin installing the tile. How to repair beadboard that is separating home guides sf.
Cement board is a type of underlayment that is now standard for most tile installations, but particularly for floor tile. How to repair a damaged hardie board cement fiberboard ehow. Use a plastic putty knife to apply the patching material to the damaged area, filling in the area and shaping the patch to match the original contours of the siding. One brand says to leave 18 inch gaps and another says to lightly butt the sheets together.
Dunno how they were made but is there an easy way to patch them. Durock cement boards are a type of drywall reinforced with cement for a harder surface. If you find out what the proper way to handle it is if be interested to know. Sand the edges of the hardi board smooth by hand and remove all dirt and debris prior to finishing hardi board. Hydraulic cement is a product used to stop water and leaks in concrete and masonry structures. James hardies technical bulletins offer detailed guidance on selecting, installing, finishing, and maintaining fiber cement siding. Choose this highperformance alternative to fiber cement boards or bare plywood surfaces for. I used a mesh tape for high humiditymoisture areas, which comes as a roll with an adhesive side, and sheet rock joint compound, not thinset, for the gaps, screw holes and seams on the cement. If youre installing tile on a wall or a countertop, youll need a base beneath the tile that will hold. Usg durock brand cement board installation guide english.
Joining fill joints with latexfortified mortar or type 1 organic adhesive and immediately embed alkaliresistant, fiberglass mesh joint tape. Thin set can be skimmed into the seams and screw holes. However, accidents can happen and if for some reason your hardie board has suffered damage you need to repair the offending section to ensure the structural stability of the overall tile installation. Superior tile bond prevents tile pops and grout cracks, up to 40% greater tile bond than fiber cement board. Apply 34 layers of paint to ensure color stability and depth. Tile tub or shower surround wall preparation todays. How to fix damaged fiber cement siding united home experts. Tile tub or shower surround wall preparation todays homeowner. To mud the joint in between durock and drywall in the humidity and moisture affected areas you would use a durabond hot mud and an alkali resistant tape. Finishing durock and drywall the home depot community. Oct 14, 2019 mix vinyl patching compound as directed by the manufacturer and trowel the compound into the area to be repaired.
Because cement board fasteners may protrude through the plywood base when 14 cement board is used, 12 or 58 cement board is preferred in this. Hopefully thinset at the top where the new cement board meets the old drywall will keep water from sneaking between the two. Using a paintbrush or paint roller, apply the paint on the surface of the cement board. Greetings bbblueyes, thats an interesting question youve got there.
All seams or other areas that are not level must be sanded flat. The seams between the durock get a special mesh tape designed for cement boarddurock. The thinset is a cement based powder that you mix with water or latex additive to form a thick paste, which is used to seal the seams in the board and can also be used to set the tile. Truefoam pargeplus is a premixed blend of sand, cement, chemical admixtures, polypropylene fibre and acrylic cement modifier. Hydraulic cement is used widely in the construction industry sealing structures below grade and in situations where structures can be. James hardie believes it is good building practice to seal the joints to prevent moisture, such as winddriven rain and snow, from penetrating the wall cavity. The manufacturers of the cement boards really want you to tape the joints in similar fashion to taping drywall. How to repair beadboard that is separating home guides. What i like about mesh tape is that you are following the manufacturers instructions on how to treat the seam. After the durock panels are in place, you must fill the joints before you can install the tile.
I am really concerned about waterthe tub instructions said to silicone the 18. For best results, apply thin layers to the surface of the board, and let each layer dry before applying another one. Do not use usg durock cement board with vinyl flooring. You might try a micrograin cementious floor patching compound designed to be sanded smooth to a feather edge. Let the compound dry overnight, and then sand until smooth. Like when your hardie board gets messed up and you dont fix it until you decide to write a post called how to repair hardie board siding. Drywall to backerboard transition in tiled showers by roger when you tear out and rebuild your shower walls you are left with a transition between the old, existing drywall and the new stuff cement backerboard or drywall if youre using kerdi. How to repair uneven cement boards home guides sf gate. Joint compound is used to help provide a seal between the durock panels and to fill the depressions left by either nails or screws during installation. Dos and donts with jeff paterson of home repair tutor duration. How to repair a damaged hardie board cement fiberboard.
Do you have to tape and fill seams on cement board when. Keep sheet edges 18 in back from walls and cabinet bases. Joint compound, not thinset on cement board in shower. Ive been adding a bedroom and bath to the basement. Product costs, availability and item numbers may vary online or by market. However, accidents can happen and if for some reason your hardie board has suffered damage you need to repair the offending section to ensure the structural stability of. The thinset and mesh tape are to strengthen the seams. Run strips of selfadhesive fiberglass drywall tape around the patch, centering the tape on the seams. Do you need to tape and mud cement board corners in dry settings. Tape the seams lay cement board fiberglass mesh tape over all the seams its sticky on one side. Cover all of the corners, joints and seams, including the joint where drywall and cement board meet, with the fiberglass mesh tape.
Sep 22, 2007 with no offense meant to answer 1, tape need not be applied to concrete backer board. The way you treat your backer board seams is one of them. Drive the fasteners, whether screws or nails, so the heads are flush with the surface of the cement board but not below it. It is used in areas of the house with high moisture and helps protect the sheathing from water damage. Maximum installed weight of the finish system should not exceed 15 psf. Installing cement board underlayment for tile flooring. The best way to get the performance you expect from your james hardie products is to work with a professional contractor. Caulking around windows, doors, eaves and trim edges gives added insurance that. Also, mesh tape is completely encased in thinset making the cement board sort of monolithic. From small dents to large holes, there are several ways to fix surface defects on your walls. It is a very simple process and i used some fibatape and thinset mortar to seal the cement board joints. Fortunately the drywall was only damaged and crumbling near the bottom. The walls and ceiling for the tubshower are cement board. A backsplash is primarily decorative and can be installed directly over drywall.
Because it is waterproof and resists movement, cement board is the preferred backing material for ceramic tiles. In your case, you can use a diamond saw on a 4 12 grinder, cut a nice square or whatever shape you desire out around the offending area, cut a block to fit it a piece of azek board is a decent choice, drill a hole just over the size of gas pipe, then slice the block in half through the hole then slip the two halves into your siding cut. Cement board replaces the old plaster and lathe underlayment for tile. How to install a cement backerboard the home depot. Usg durock cement board is not designed for use as a structural panel. The procedures for patching cement board and patching drywall are similar, but you need different tools to cut the two materials. Watch out for any bubbles and cracks on the surface of the board. Here are the basics of taping backer board joints effectively.
How to install cement board cbu for floor tile one. Mix up enough mortar to fill in all seams and joints and cover the nail holes in the backer board. Durabond and joint compound might occasionally compomise an installation maybe 1 in 100, i dont really know. Run strips of selfadhesive fiberglass drywall tape around the patch, centering the tape on the seams use a 6inch drywall taping knife to spread drywall joint compound across the patch and tape to create a smooth, flat surface. Position the sheets so you dont have four corners that meet.
Consider these points and plan your purchases accordingly. How to install cement board for tile projects family. This type of wall material can be finished just like ordinary drywall, using joint tape and joint compound. When you install backer board, you will notice that the edges are tapered, which allows the boards to meet and forms a small gap. I usually put a small gap in when i install cement board on walls. With no offense meant to answer 1, tape need not be applied to concrete backer board. Cement board is a type of backer board that is installed under ceramic tile. Use thinset to embed cement board tape into cement board joints. Pack in thinset, lay on the tape, and flatknife to get it set in. Pargeplus foam insulation atlantic canada, nova scotia. Use the cement based, rapidsetting patching compound recommended by the floor covering manufacturer. What do you do with the seams in between durock, permabase.
Decide whether you want to repaint the whole wall or just touch up patched areas. We recommend 14 in hardiebacker ensure subfloor is not. Mar 22, 2014 you can contact the office of united home experts at 5088818555. Backer board is a term used to describe a drywalllike product that goes behind ceramic tile. A cabin lm fixing up has some cement sheeting lining on 3 or 4 walls. Now the cheap, temporary solution to fixing the siding. If you use patching mortar instead of vinyl patching compound, either mix it with bonding agent instead of water, or coat the edges of the surface to be repaired with bonding agent. Hardie board, wonderboard and durock are all classified as cement boards. Download our technical bulletins for indepth advice and information. Hey, just installed cement board plastic barrier underneath and applied mesh tape and thin set to seams. For this reason, cement board should be installed over a moisture barrier, such as heavy plastic sheeting, in wet areas like showers and bathtub alcoves. Ive used it to tape cement board joints because you can get very smooth, flat joints, which helps get better tiling results than with less smooth thinset on theses joints i know you wont be tiling and would need more stuffit relatively expensive. Cement board also provides an additional layer over a plywood or particleboard subfloor, adding stiffness to the tile.
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