How do you tape Hardie board joints?
How do you cover seams on cement board? Use special mesh tape on seams
Cut drywall to fill in between the existing wall or ceiling and the cement board. Screw the drywall to the studs. Cover all of the corners, joints and seams, including the joint where drywall and cement board meet, with the fiberglass mesh tape.
Can you use drywall joint tape on cement board? You’ll need to strike a balance and use materials that work for both drywall and cement board. Paper tape designed for drywall is not ideal for use on cement boards. Thinset mortar used to seal seams between two pieces of cement board is not a good material to use on drywall.
Do you leave a gap between cement board? Stagger all HardieBacker cement board joints. Do not align with subfloor joints. Never allow all four corners of boards to meet at one point. We recommend an 1/8 in gap between board edges.
How do you tape Hardie board joints? – Related Questions
How do you fill gap between cement board and drywall?
Fill the gap between the boards with mortar using the 6-inch taping knife. Force it into the gap and apply a thin layer on both sides of the joint for a total width of 3 to 4 inches. Place fiberglass mesh tape over the entire length of the joint and smooth it with the knife.
Which is better durock or Hardibacker?
Durock is too abrasive and can damage vinyl, porcelain, and enamel. HardieBacker does not contain any course materials, so it is the preferable choice. It has a warranty that extends over the use of vinyl tile applications. Durock does not.
Do you need to seal durock?
Durock (USG): If waterproofing is desired, use USG Durock™ Tile Membrane or USG Durock™ Brand Waterproofing Membrane. Hardiebacker (James Hardie): the use of a waterproof membrane, vapor barrier or vapor. retarding membrane is optional unless the local building code requires it.
Do you caulk James Hardie siding?
When James Hardie siding products butt into wood-based materials, a 1/8″ gap will allow for expansion and contraction of the wood-based product. Caulks and Sealants: James Hardie recommends the use of caulks and sealants that remain permanently flexible.
Do I need vapor barrier behind Hardibacker?
Hardibacker doesn’t need a vapor barrier or waterproofing except you do need to tape and thinset the joints.
Does cement board need to be waterproofed?
So, if you’re looking for durability and strength, concrete backer-board will probably be your choice. First, you should provide a waterproof/resistant membrane against the wood studs before installing the concrete backer-board to protect the wood studs from moisture absorbed through the backer-board.
What kind of tape do you use on cement board?
FibaTape Drywall Tape for Cement Board
FibaTape® Cement Board Tape is a patented alkali-resistant fiberglass mesh drywall tape, and the only tape that should be used for cement applications with dry or thin-set mortar.
Does joint compound adhere to concrete?
Yes, it will adhere. There are certain steps you need to take though. First, don’t even attempt it if that concrete is damp on the other side, IE if it’s an exterior foundation wall.
Can I just screw down cement board?
Screw and Joints
Do not use drywall screws as they are not recommended to be used to hold the backer board in place. All of your backer board pieces should be cut before they are placed on the floor. It is important to highlight that screws shall not be installed all the way down to the floor joists.
Can you put screws in Hardie board?
James Hardie Building Products recommends keeping nails or screws at least 3/8 inch from the end of a plank. Drill pilot holes, at each mark, one-quarter to one-half inch deep, to make it easier to insert screws and prevent cracking the siding. Align the bracket holes with the pilot holes in the siding.
What do you do with a gap between tub and cement board?
Caulk the gap
Ideally, you would leave a 1/8 inch gap which would then have the sealant applied to it. Either stopping the cement board above the tub flange or alternately shimming it out and dropping it down near the tub would both be good options.
Can you finish cement board like drywall?
Durock Cement Boards are a type of drywall reinforced with cement for a harder surface. This type of wall material can be finished just like ordinary drywall, using joint tape and joint compound.
What kind of Thinset goes under cement board?
Powered cutting tools are not advisable for cutting cementitious backer board, as they produce fine-particle cement dust. Mix dry, polymer-modified thinset mortar with water in a bucket, using the mixing instructions provided on the thinset bag. Blend the mixture with a paint stir stick.
Is Hardibacker board good for showers?
If you wish to build a conventional shower, it doesn’t really matter which you use, Durock or Hardiebacker. My limited experience is that the Hardie is less prone to crack if you get a screw too close to the edge. It may be a little harder to cut cleanly, though.
Is Hardie board good for showers?
sheets of cement board are sized for efficient use around bathtubs and showers. The core isn’t waterproof, but it can withstand getting wet without falling apart, so even if your waterproofing system leaks, the board will stay intact.
Does durock need a vapor barrier?
I called USG,the maker of Durock cement board Next Gen, and they advised using no vapor barrier so that the wall cavity can breath and allow any moisture to evaporate. Their online instructions/diagrams show no use of a vapor barrier.
Do you have to waterproof Durock cement board?
Water does not affect USG Durock® Brand Cement Board, however, TCNA guidelines recommend the use of a waterproof membrane in wet areas.
Will Thinset stick to RedGard?
From what I have read, the premixed thinset does not dry out to form a good adhesive bond when applied over/under a non-permeable membrane like Redguard or the Kerdi-band products. The dry mix (where you add the water on-site) does.
What size nails do you use for Hardie siding?
Pick out stainless steel or hot-dipped galvanized nails size 6d, 1 1/2-inch-long siding nails and 2-inch long siding nails in the quantity you need for your project.
Can you tile straight onto Hardibacker?
The Hardibacker will be fine to tile straight onto.
What side of Hardibacker faces out?
Which side goes up, smooth or rough? Either is acceptable, but we recommend that the smooth side with the nailing pattern of every 8″ on center go up. What subfloor should HardieBacker® cement board be installed over?