filling gaps in hardibacker

So, it depends on what CBU you used on the walls. 2 | Determine layout of HardieBacker cement board Stagger all HardieBacker cement board joints. 5. then just caulk the edge neatly. The 1/4" gap referred to applies to the perimeter of a room and not each board however each board should be gapped slightly then each gap covered with alkali-resistant mesh joint tape and then filled and bedded with thinset mortar. Another thing you should have considered was deflection. can i just fill this little gap with thinset when i cement the hardie board down or do i need to cut a little sliver of This allows the surface of all the boards to move as a single unit when it is stressed. Thinset likes to shrink when it cures. Brian O'Brien, pastor of St. Francis Xavier, said his church didn't hesitate to answer the call for help when the congregation learned Afghan refugees would be resettling in Stillwater. Step 2 - Apply the Tape Once you have filled the gap with thinset, apply fiberglass tape. Do not align with subfloor joints. Spacing Hardi Board. My problem is that between some of the cement boards are gaps due to the walls not being entirely straight. Depending on the thickness of your tile, you should be able to add a layer of Hardiebacker (probably 1/2 inch). How do you fill the gap between brick and siding? What is my best option to fill those in before tiling? 1. Before installing the backer board in the shower pan, make sure to level and screed (smooth) out any imperfections in the flooring. The cement basis of the product dictates the use of thin-set mortar to properly repair cracks or holes. Step 2 - Screw In Siding. For wall installation, if leaving 1/8" gap between hardie backer boards, would it be better to 1. fill then gap with thinset 2. Once the glue has dried, typically 24 to 48 hours, you will need to screw or nail in the siding so that it stays. If the boards are installed with no gap, there is a good chance that cracks will appear immediately above the backer board seam. For an excessive gap a Z type flashing might be appropriate: Be aware that a silicone sealant joint should be deeper than it is tall so it forms an hour glass shape in section allowing the silicone to stretch without losing adhesion. 01-10-2001, 11:48 PM. gwhitmore 03-22-2014, 12:50 PM Thanks again Richard. The first step in installing Hardiebacker to the subfloor is to make sure you have a structurally sound subfloor that is not damaged, loose, warped, uneven, and that it has a clean and flat surface. The boards should be scored with a straight edge and pulled upwards. Add horizontal backing as well between the studs, assuming the tile is not going all the way to the ceiling plate. The thinset will shrink and you'll lose bond to the tile. Step 1 - Fill the Gaps. Never allow all four corners of boards to meet at one point. Space between plywood supports is not to exceed 16" on center. How to Fix the Gap between the Brick Wall and the Siding. How do you fill gaps in cement board? The cement basis of the product dictates the use of thin-set mortar to properly repair cracks or holes. It's hard to say what thickness of Hardiebacker you should use without knowing the size of the gap and the thickness of the tile. Cement board gaps [ 5 Answers ] I am tiling in my shower and am in the process of putting up the cement board. be careful with the mud and grout so it doesnt go past the edge of the tile. Most of the joint above and below the wider section is 32 7/8" from the other shower/tub wall. i left a 1/8" to 1/4" space around the perimeter and between the boards like the instruction said, but in the door frame where i cut the hardwood floor up, there is a gap about 1-1.5" between the hardie board and the hardwood. Step 2 - Screw In Siding. Alkali-Resistant Mesh Tape 2-inch alkali-resistant mesh tape is applied at every backer board seam and corner For tile backer boards such as Durock, Wonderboard, Hardiebacker, Permabase, and others the seams between the board need to be treated with 2-inch alkali-resistant mesh tape. The thinset will remain bonded to the tile but pull the tile with it and SNAP. Once the glue has dried, typically 24 to 48 hours, you will need to screw or nail in the siding so that it stays. Jul 29, 2018 at 23:27. 2 coats. Keep sheet edges 1/8 in back from walls and cabinet bases. The boards can be easily scored and snapped and necessary cuts implemented. The Hardibacker will be fine to tile straight onto. How do you fill gaps in cement board? If larger you might consider filling the gap with some PL premium caulk,,,,, let that dry and then do the mud and tape. HardieBacker should be allowed to aclimatise for 24 hours before using the stove. 2 | Determine layout of HardieBacker cement board Stagger all HardieBacker cement board joints. Determine layout of HardieBacker cement board. Then a coat of thinset gets flat troweled over the seam. Step 1: For holes larger than 1/2-inch in diameter, use a carton knife or carbide-tipped tool to cut a V-shaped groove behind the edges of hole. Ensure cabinets are level and secure. - paul Jul 29, 2018 at 23:27 Add a comment Then a coat of thinset gets flat troweled over the seam. We recommend an 1/8 in gap between board edges. 9 bronze badges. Mold resistant drywall will suffice. In terms of a suitable substrate, you should refer to manufacturers instructions. There are 'true' cement boards that CAN be embedded in the shower pan mudbed, and fiber-cement boards that must NOT be embedded in it. That wood you added becomes part of the framing. 1 You don't need hardibacker in those areas. How to Fix the Gap between the Brick Wall and the Siding Step 1 - Glue. 2. Begin by applying a glue to the back of the siding and pressing it completely. You don't need hardibacker in those areas. Home improvement Ron Hazelton shows how to patch and repair holes in ceramic tile. 2. Tape the seam with alkaline resistant mesh tape (either right after thinsetting the gap or wait till it dried) 3. Cement board gaps [ 5 Answers ] I am tiling in my shower and am in the process of putting up the cement board. Beside above, how do you fill gaps in cement board? Then start laying the . Apply red Gard or hydroban on the entire wall. What is my best option to fill those in before tiling? Do not align HardieBacker cement board with plywood joints. I have a question for the forum that I have mulled over for some time and not been able to resolve: What good does spacing Hardi-Board edges from one-another do if you then follow up the installation by filling the gapped edges with thinset and overlay with fiberglass tape, assuming the required . FWIW, HardieBacker is a fiber-cement board, and is one that cannot be embedded in the shower pan. The gaps are at most 1 inch thick. If you insist, use a strip of wood to cover the gap between such dissimilar materials. Screw the HardieBacker into the floor, using 1-inch backerboard screws and using one screw every 8 inches. Keep sheet edges 1/8 in back from walls and cabinet bases. Can you tile straight onto Hardibacker? By the time you add your thinset and tile, you should makeup the gap. The cement basis of the product dictates the use of thin-set mortar to properly repair cracks or holes. Then attach your cement board: it should have a wooden lip all the way around to attach to, with that wood secured to the studs. when setting your tiles place them over the gap and about 1/4 inch past the sheetrock edge. Make certain the subfloor has a clean and flat surface. Pull out a big enough piece of tape to cover the entire gap, then press the tape down on the gap. For a gap that large, just add the CBU. Apply a gap filling bed of tile adhesive to the subfloor using a 6mm notched trowel. The gaps are at most 1 inch thick. It should go directly over the thinset and on to the backer board on the edges. cabinet. 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'm not comfortable with anything over 1/2" thick. If El Dorado stone says it is okay to install on hardibacker for exterior use, then you are fine. Apply some thinset to the gap. If you attempt this, 2 things might happen: 1. 3 Finishing Finish with Black Matt Spray When HardieBacker is only being used to line the hearth before setting the fire in place, spray This is probably because at one time the installation instructions for Hardibacker called for 3/32" inch of thinset underneath.Currently, Hardibacker calls for either 1/4" thinset, or 5/32" mastic underneath.I always use 1/4" trowel for all my underlayment and 3/8" for almost all my tile. Do not align with subfloor joints. If you insist, use a strip of wood to cover the gap between such dissimilar materials. Step 3 - Caulk Around. The chosen non-flexible tile adhesive should be applied to the subfloor when the 6mm HardieBacker floor board should be slowly embed into the wet adhesive . You can paint it if you'd like. . This is an older thread, you may not receive a response, and could be reviving an old thread. If there is a good size gap, any thing larger then 3/16 between the two, I fill it the night before with a drier mortar mix first then tape it putting barely any mortar over the tape almost just embedding the tape in the fill mortar running over it with a dry knife.. In order to complete the installation effectively, you need to fill this gap and level it off. Floor Installation It is the material that you use underneath the backer board to . Use minimum 1/2" exterior grade plywood or equivalent, positioned across the wood. The purpose isn't to make the board stick, it . We recommend an 1/8 in gap between board edges. The reason for the gap is so that it can be filled with thinset mortar which tends to edge-glue neighboring boards. To see more DIY videos, visit http://www.ronhazelton.com.Transcript: Patch. Replace any loose, warped or uneven sections of the floor. Click to see full answer Similarly, it is asked, how much thinset do you put under Hardibacker? Begin by applying a glue to the back of the siding and pressing it completely. Work thinset onto the mesh tape. Step 3 - More Thinset Mold resistant drywall will suffice. The Rev. It's hard to tell from the pics. This is easier to achieve with 1/2" or 3/8" thick marble tile than with eased edge ceramic tile. Never allow all four corners of boards to meet at one point. My problem is that between some of the cement boards are gaps due to the walls not being entirely straight. 4. - paul. . Embed HardieBacker boards with a sliding motion firmly and evenly in the wet tile adhesive. Step 1 - Glue. Step 1: For holes larger than 1/2-inch in diameter, use a carton knife or carbide-tipped tool to cut a V-shaped groove behind the edges of hole. Then the gap increases by 1/4 inch for about 12 inches. Using 1/2 Hardibacker for the shower transitioning into 1/2 greenboard outside the shower. If you need to make circular cuts, just score the hole, mark the weak point in the centre and tap it with a hammer. I'm going to use mesh and mastic for the corner seam [] Skip to content . Thanks If there are any large cracks at all, you should fill these in with cement backer board adhesive or equivalent before laying down any boards. Offset the interior screws so they are staggered with the outer screws, and make sure no screws are closer than two inches from the edge. kcox. You need to apply the tape while the thinset is still wet. Step 1: Level Out the Flooring. Next I mortar the corner seam of the side I am working for about 18'-24" from the bottom making sure it is filling any gap between the two boards. You could put a piece of that wood in their to match the other wood if there is any. Hardiebacker, Permabase, and others the seams between the board need to be treated with 2-inch alkali resistant mesh tape. Thanks You can paint it if you'd like. 1. That will give a much sturdier backing for your tile. HardieBacker Boards Installation HardieBacker boards can be easily cut with the carbide tipped scoring knife. 1. Gaps of minimum 3mm between the wall edges and the floor should be filled with adequate moisture resistant sealant. PRO Leave a 3mm gap between floor and wall edges and fill the joints with a suitable fire mastic or fire cement. We call the adhesive layer a gap filling bed of adhesive, and it can be flexible or non-flexible.

filling gaps in hardibacker