filling gaps in hardibacker

In terms of a suitable substrate, you should refer to manufacturers instructions. 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 … 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. 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. This is easier to achieve with 1/2" or 3/8" thick marble tile than with eased edge ceramic tile. Step 3 - Caulk Around. gwhitmore 03-22-2014, 12:50 PM Thanks again Richard. If larger you might consider filling the gap with some PL premium caulk,,,,, let that dry and then do the mud and tape. If El Dorado stone says it is okay to install on hardibacker for exterior use, then you are fine. Depending on the thickness of your tile, you should be able to add a layer of Hardiebacker (probably 1/2 inch). 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. Once the glue has dried, typically 24 to 48 hours, you will need to screw or nail in the siding so that it stays. 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 . For wall installation, if leaving 1/8" gap between hardie backer boards, would it be better to 1. fill then gap with thinset 2. To see more DIY videos, visit http://www.ronhazelton.com.Transcript: Patch. 1. PRO 2. 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. You don't need hardibacker in those areas. The boards can be easily scored and snapped and necessary cuts implemented. Floor Installation The gaps are at most 1 inch thick. How to Fix the Gap between the Brick Wall and the Siding Step 1 - Glue. 5. Determine layout of HardieBacker cement board. That wood you added becomes part of the framing. cabinet. So, it depends on what CBU you used on the walls. • Leave a 3mm gap between floor and wall edges and fill the joints with a suitable fire mastic or fire cement. How do you fill gaps in cement board? Using 1/2″ Hardibacker for the shower transitioning into 1/2″ greenboard outside the shower. What is my best option to fill those in before tiling? What is my best option to fill those in before tiling? 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. Screw the HardieBacker into the floor, using 1¼-inch backerboard screws and using one screw every 8 inches. Then start laying the . You can paint it if you'd like. Once the glue has dried, typically 24 to 48 hours, you will need to screw or nail in the siding so that it stays. Gaps of minimum 3mm between the wall edges and the floor should be filled with adequate moisture resistant sealant. The Hardibacker will be fine to tile straight onto. How do you fill the gap between brick and siding? . My problem is that between some of the cement boards are gaps due to the walls not being entirely straight. 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.. Apply a gap filling bed of tile adhesive to the subfloor using a 6mm notched trowel. Spacing Hardi Board. The gaps are at most 1 inch thick. Cement board gaps [ 5 Answers ] I am tiling in my shower and am in the process of putting up the cement board. Do not align with subfloor joints. Thinset likes to shrink when it cures. Pull out a big enough piece of tape to cover the entire gap, then press the tape down on the gap. The thinset will remain bonded to the tile but pull the tile with it and SNAP. The thinset will shrink and you'll lose bond to the tile. Step 1: Level Out the Flooring. . be careful with the mud and grout so it doesnt go past the edge of the tile. How do you fill gaps in cement board? Embed HardieBacker® boards with a sliding motion firmly and evenly in the wet tile adhesive. 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. Mold resistant drywall will suffice. Step 2 - Screw In Siding. • Never allow all four corners of boards to meet at one point. For a gap that large, just add the CBU. The reason for the gap is so that it can be filled with thinset mortar which tends to edge-glue neighboring boards. Before installing the backer board in the shower pan, make sure to level and screed (smooth) out any imperfections in the flooring. Most of the joint above and below the wider section is 32 7/8" from the other shower/tub wall. You could put a piece of that wood in their to match the other wood if there is any. • We recommend an 1/8 in gap between board edges. If you insist, use a strip of wood to cover the gap between such dissimilar materials. 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. Step 1 - Fill the Gaps. 1. Then the gap increases by 1/4 inch for about 12 inches. Begin by applying a glue to the back of the siding and pressing it completely. Step 1 - Glue. Do not align with subfloor joints. 2 coats. Add horizontal backing as well between the studs, assuming the tile is not going all the way to the ceiling plate. Apply red Gard or hydroban on the entire wall. My problem is that between some of the cement boards are gaps due to the walls not being entirely straight. 1. We call the adhesive layer a gap filling bed of adhesive, and it can be flexible or non-flexible. The purpose isn't to make the board stick, it . The cement basis of the product dictates the use of thin-set mortar to properly repair cracks or holes. 3 Finishing Finish with Black Matt Spray • When HardieBacker is only being used to line the hearth before setting the fire in place, spray Beside above, how do you fill gaps in cement board? 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. FWIW, HardieBacker is a fiber-cement board, and is one that cannot be embedded in the shower pan. It's hard to tell from the pics. I'm not comfortable with anything over 1/2" thick. • Use minimum 1/2" exterior grade plywood or equivalent, positioned across the wood. How to Fix the Gap between the Brick Wall and the Siding. - paul. Replace any loose, warped or uneven sections of the floor. It is the material that you use underneath the backer board to . The cement basis of the product dictates the use of thin-set mortar to properly repair cracks or holes. 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. The boards should be scored with a straight edge and pulled upwards. Then a coat of thinset gets flat troweled over the seam. If the boards are installed with no gap, there is a good chance that cracks will appear immediately above the backer board seam. Cement board gaps [ 5 Answers ] I am tiling in my shower and am in the process of putting up the cement board. You need to apply the tape while the thinset is still wet. Step 3 - More Thinset 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. In order to complete the installation effectively, you need to fill this gap and level it off. When you install backer board, you will notice that the edges are tapered, which allows the boards to meet and forms a small gap. 4. Make certain the subfloor has a clean and flat surface. 01-10-2001, 11:48 PM. Step 2 - Screw In Siding. Begin by applying a glue to the back of the siding and pressing it completely. kcox. 1 You don't need hardibacker in those areas. Work thinset onto the mesh tape. If you attempt this, 2 things might happen: 1. Then a coat of thinset gets flat troweled over the seam. Tape the seam with alkaline resistant mesh tape (either right after thinsetting the gap or wait till it dried) 3. You can paint it if you'd like. Can you tile straight onto Hardibacker? • We recommend an 1/8 in gap between board edges. This is an older thread, you may not receive a response, and could be reviving an old thread. Thanks Click to see full answer Similarly, it is asked, how much thinset do you put under Hardibacker? Hardiebacker, Permabase, and others the seams between the board need to be treated with 2-inch alkali resistant mesh tape. If you insist, use a strip of wood to cover the gap between such dissimilar materials. Home improvement Ron Hazelton shows how to patch and repair holes in ceramic tile. By the time you add your thinset and tile, you should makeup the gap. 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. Mold resistant drywall will suffice. • Keep sheet edges 1/8 in back from walls and cabinet bases. Step 2 - Apply the Tape Once you have filled the gap with thinset, apply fiberglass tape. This allows the surface of all the boards to move as a single unit when it is stressed. HardieBacker Boards Installation HardieBacker boards can be easily cut with the carbide tipped scoring knife. 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. It should go directly over the thinset and on to the backer board on the edges. 2 | Determine layout of HardieBacker cement board • Stagger all HardieBacker cement board joints. then just caulk the edge neatly. If you need to make circular cuts, just score the hole, mark the weak point in the centre and tap it with a hammer. 2 | Determine layout of HardieBacker cement board • Stagger all HardieBacker cement board joints. That will give a much sturdier backing for your tile. Space between plywood supports is not to exceed 16" on center. Jul 29, 2018 at 23:27. • Never allow all four corners of boards to meet at one point. 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 . The cement basis of the product dictates the use of thin-set mortar to properly repair cracks or holes. 2. Apply some thinset to the gap. 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. when setting your tiles place them over the gap and about 1/4 inch past the sheetrock edge. • Do not align HardieBacker cement board with plywood joints. Another thing you should have considered was deflection. I'm going to use mesh and mastic for the corner seam […] Skip to content . 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. 9 bronze badges. HardieBacker should be allowed to aclimatise for 24 hours before using the stove. The Rev. Ensure cabinets are level and secure. • Keep sheet edges 1/8 in back from walls and cabinet bases. - paul Jul 29, 2018 at 23:27 Add a comment Thanks 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.

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