Evening all, I've just been to look at a job I'm starting next week and the client has removed all the old tiles from around the bath area revealing a wall that is a straw centre with a skim coat, annoyingly I left my phone at home so didn't get a pic. Basically what I'm asking is, how are these walls constructed? Is there a stud frame inside or is it a solid piece that will need to be overboarded? I don't want to rip it down and find its all one wall and end up in the bedroom next door! It's an internal wall, all the external walls are sand/cement render with skim coat and the house was built mid 1980's. If anyone could shed some light on this construction method and possibly give me some pointers of the best way of tackling it, I'd be most grateful

Can't remember what there called but it has a paper layer on the compacted straw which was a green thing at the time..as far as I can remember it's one wall, so both sides share the same board..

Found a link http://www.stramit.co.uk/content/view/12/26/

Yeah that's right Mark, a paper layer ontop (soaking wet!!!!) then the skim coat. I'm thinking mechanically fix cement boards over the top, what do you reckon?

Think we typing at the same time, found a link, added to my previous post..

Originally Posted by Bri

Yeah that's right Mark, a paper layer ontop (soaking wet!!!!) then the skim coat. I'm thinking mechanically fix cement boards over the top, what do you reckon?

Hi Bri, I remember this stuff, along the same lines of paramount boards, in the link that Mark put up it says you can fix to it, so I would think your Idea of a mechanical fix may be the way to go. I would like to see any other imput from members with more experience with this board.

I felt a bit daft looking at it, never seen it before and the house isn't that old! I hope the customer hasn't lost any faith in me!


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I've only ever seen it once in an 80's house as yourself...

There's a housing estate local to me that's is done with them. They are rock solid provided that the cardboard coating is intact. You will muller every blade that you have if you try to cut sections out of them.

There is absolutely no need to overboard them unless working with stone, Bri as they are stronger than standard plasterboard. Treat them the same as you would plasterboards, i.e. tank wet areas etc..

Regards,

Daz

There's quite a bit damaged from water Daz, I either need to repair or replace (or overboard). The paper layer and skim is heavily damaged around the bath area.


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Bugger, good luck with that Bri .
I'd suggest overboarding mate, you'll run out of swear words, energy and sharp tools if you try cutting out the affected areas (I know I did when I had to do exactly the same as you).

Daz

Cement board screwed and plugged then tanked is going to be my plan of attack! I'll let you know how it goes!


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Why are you tanking cement boards? Just make sure the joints are water tight and fire a splodge of silicone into the plugs before screwing.

Daz

I've done a few and overboarded with marmox. I used the 2.4 x 0.6 sheets of 12.5mm. I fixed them horizontally with SPF addy combed on the walls and fixings into the panels timber surround. It's not easy screwing into them as the timber is normally quite narrow.


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Originally Posted by Stewart

I've done a few and overboarded with marmox. I used the 2.4 x 0.6 sheets of 12.5mm. I fixed them horizontally with SPF addy combed on the walls and fixings into the panels timber surround. It's not easy screwing into them as the timber is normally quite narrow.


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Ahh so there is a frame around the outside, that's one of the things I was trying to find out, I was a little wary of just plugging and screwing into the straw.

Originally Posted by Daz

Why are you tanking cement boards? Just make sure the joints are water tight and fire a splodge of silicone into the plugs before screwing.

Daz

Water can still get through them, its a bit of a belt and braces approach as I don't want the wall to get anymore water damage. Maybe a bit OTT but for the sake of £45 and an hour of my time to tank it, I'll go with it. I do agree with you though, not something I would usually do!

Originally Posted by Daz

Why are you tanking cement boards? Just make sure the joints are water tight and fire a splodge of silicone into the plugs before screwing.

Daz

i have only fixed on cement board once Daz but it wasent waterproof aqua panel couldn't see the point of it over plasterboard other than it can carry more weight