Thickness of WEDI backerboard

[glynd]

2balls,

What thickness bed should I used and would that be a solid bed or a notched one?

Thanks

 

[2Balls]

Morning, 8mm notched should do the trick,when the brick or block work is flat, use a grout float to tap in:8:2Balls

 

[beanz]

Boards were solid dabbed onto a wall. A paving slab (50cm x 50cm x 5cm @ 25kg) was glued to the board. Additional slabs were bonded to the first slab. In the end there were 6 slabs, 150kg, and it looked pretty dangerous but it still didnt fail.

The reduction to 87kg was similarly tested on a studded frame wall and failure occurred due to the flexing of the boards due to the pitch of the studded frame rather than any failure of the adhesion of the coating to the foam.

The boards come with a 10 year guarantee.

Hope this helps,

That doesn't sound very scientific to me, they are a couple of one-off tests!?! How did it hold up over time, under that load?

I'm not saying that these boards aren't great for the price, but i'd be very careful about quoting those weight limits.

 

[Uheat]

That doesn't sound very scientific to me, they are a couple of one-off tests!?! How did it hold up over time, under that load?

I'm not saying that these boards aren't great for the price, but i'd be very careful about quoting those weight limits.

Why would i need to be careful about quoting those weight limits?

The information has come direct from one of our suppliers of This product, they make a lot of these insulation boards, and are saying that the weights limits are acceptable on their product. If they are also supplying a 10 yr guarantee with the boards so why would i question it.

We also Sell Marmox Insulation Boards and these will hold up to 62kg/m2. I am sure if you were to speak with wedi technical they will quote you a slightly different figure.

 

[glynd]

Is there anyway of improving the load bearing capacity of plaster without having to remove all the plaster?

Perhaps by fixing backeboard on top of the plaster with both adhesive and mechanical fixings through the plaster and into the underlying brickwork?

 

[DHTiling]

Is there anyway of improving the load bearing capacity of plaster without having to remove all the plaster?

Perhaps by fixing backeboard on top of the plaster with both adhesive and mechanical fixings through the plaster and into the underlying brickwork?

YES that will work also.....use adhesive to attach then fix as well....

 

[Uheat]

:stupid:

 

[DHTiling]

 

[White Room]

Have sent you a PM Dave,

From one of our manufacturers of Thermal Construction Board.

Boards were solid dabbed onto a wall. A paving slab (50cm x 50cm x 5cm @ 25kg) was glued to the board. Additional slabs were bonded to the first slab. In the end there were 6 slabs, 150kg, and it looked pretty dangerous but it still didnt fail.

The reduction to 87kg was similarly tested on a studded frame wall and failure occurred due to the flexing of the boards due to the pitch of the studded frame rather than any failure of the adhesion of the coating to the foam.

The boards come with a 10 year guarantee.

Hope this helps,

You say dabbed Aaron, any information on what they used to dab the boards on the wall with that weight. Thanks