Olican Private Member. One for Runswithscissors or anyone else in the know, viewed a job and client has fitted Knauf Aqua panel and asked for it to be skimmed, I advised that this wasn't suitable for plaster. Client told me Travis Perkins said they were. He called for clarification and was told again yes suitable for plaster. Dansouthcoast84 Private Member. Topspread16 Well-Known Member.
Kasper Active Member. Plaster doesn't stick to it. Its waterproof. Its peeling really badly. Had guy once trying to dot and dab a sheet of it onto block wall and he pvaed the back of it 3 times and it didn't stick at all. Nath80 Well-Known Member. Definitely not without prepping it. I skimmed over it after green gritting it once but I told the customer there was no comebacks on me as I had told him to board it. Turned up and found that on the walls.
Use a hammer drill to pre-drill the holes in the mortar and make sure you use Tapcon anchors that penetrate into the mortar at least 1. Once the furring strips and liquid nails adhesive has set up for 24 hours, then attach the cement board to the furring strips using non-corrosive screws Rock-on fasteners. Should you waterproof cement board? Concrete backer-board, once commonly referred to in the field by the brand name Wonderboard r , is a cement product designed as a sheathing material for walls and floors.
Most concrete backer-boards on the market today are not water-resistant, but all are waterproof. How do you attach cement board to a wall? Do I need to seal cement board before tiling? Although most backerboards currently available won't fall apart when exposed to moisture and are somewhat water-resistant, they aren't waterproof.
To prevent moisture from seeping through to the wood or metal studs beneath the tile, a barrier or sealant must be used on porous materials. Do I need to prime cement board before tiling? Old stone cottage Hi I commissioned a local landscape gardener to lay sand stone paving slab to the side of our house. I can clearly see its not Hi, sorry if this is a bit basic but I need a bit of advice. Post by panlid » Tue Aug 28, pm.
Style by Arty - Update phpBB 3. Privacy Terms. Quick links. Logout Register. I was not sure of the answer and so I contacted Knauf technical, who kindly answered the question for me- The Knauf Aquapanel can only be installed mechanically using a frame system. This board cannot be direct bonded using the bonding compound for two reasons: 1 The board itself is cement based and is not compatible with the bonding compound which is gypsum based.
As they are not compatible, the bonding compound will not adhere the board. If you do try this, you may find that the board comes off the compound within a few days. For this reason, you have to ensure an air gap to the back of the board for the moisture to disperse. This is done by ensuring that the board is fitted onto a frame.
If you are using a metal frame, we would recommend using the Knauf Apertura Lining systems explained in the attached in detail. If using timber studs instead, a minimum depth as recommended by the British Standards is 38mm.
This is also gives you the option of adding insulation between the frame should you need to increase the thermal performance of your wall.
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