PVC cladding replacement

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luke105

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Our house has pvc cladding under the 2 front windows. (Upstairs and downstairs)
I had a look underneath and it’s a timber frame with insulation in-between.
I am a plasterer but haven’t ever done a job like this before.
my idea is to remove pvc cladding, replace insulation for new, board the frame out with external cement board then render as normal on top of these boards. (Sand and cement)
Now....is this the way? Or am I wrong?
hoping someone has done a job like this before. Thanks
 
luke105 said:
Our house has pvc cladding under the 2 front windows. (Upstairs and downstairs)
I had a look underneath and it’s a timber frame with insulation in-between.
I am a plasterer but haven’t ever done a job like this before.
my idea is to remove pvc cladding, replace insulation for new, board the frame out with external cement board then render as normal on top of these boards. (Sand and cement)
Now....is this the way? Or am I wrong?
hoping someone has done a job like this before. Thanks
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Are you sure you're a plasterer?
 
I’ll expand on my reply for you. The upstairs window is supported by the timber frame so there’s no way of putting heavyweight materials in between the 2 windows as there is no lintel to support this. So the only viable way is to use an external cement board fixed to the timber frame as something for the top coat render to fix on.
So all I’m asking is would this be the method.
 
luke105 said:
yes. I take it you don’t know the process?
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Well I'm an old git with very limited knowledge of modern renders/methods, but I do know that you can't put s&c onto boards, that's very basic stuff. I believe that in the Weber system you'd put Lac on to boards as your adhesive coat.
There are some lads that are well up to speed on these modern renders and I'm sure that you'll get a much more comprehensive answer from them.
 
I wasn’t sure if a eml would assist in adhering. Although I’m sure a modem render k-rend etc would be better I just want to know about sand and cement as it’s a lot cheaper.
 
Groove37 said:
As a total novice couldn’t you use plasterboard?? And possibly use universal one coat to get the texture/pattern you desire
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wouldn't want to be using that on the outside lol.
I believe it would have to be external cementboard with a render on top. I’d just like to see if anyone on here has done this
 
luke105 said:
Our house has pvc cladding under the 2 front windows. (Upstairs and downstairs)
I had a look underneath and it’s a timber frame with insulation in-between.
I am a plasterer but haven’t ever done a job like this before.
my idea is to remove pvc cladding, replace insulation for new, board the frame out with external cement board then render as normal on top of these boards. (Sand and cement)
Now....is this the way? Or am I wrong?
hoping someone has done a job like this before. Thanks
Click to expand...
Insulate between studs,Render carrier board instead of cp board, mesh reinforced base coat, finish with a silicone textured render instead of s&c.
Thanks you your welcome put the grand cheque in the post
 
Plenty of ideas. I really did want to use sand and cement especially as there’s so many primers and admixes out there now and I do like the look of sand and cement render. Seeing that silicone render on a lot of council house stock really puts me off that stuff.
 
luke105 said:
Plenty of ideas. I really did want to use sand and cement especially as there’s so many primers and admixes out there now and I do like the look of sand and cement render. Seeing that silicone render on a lot of council house stock really puts me off that stuff.
Click to expand...
If you really want to use s&c then just put ply or sterling board over the insulation/timbers. Cover that with breathable membrane. Fix battens and cover with another layer of breathable membrane, followed by EML or Riblath. The EML or Riblath should be stainless steel. Then a simple three coat s&c render and you're done.
Maybe bite the bullet and use one of the modern renders?
 
wouldn’t 2 coat be enough?
essexandy said:
If you really want to use s&c then just put ply or sterling board over the insulation/timbers. Cover that with breathable membrane. Fix battens and cover with another layer of breathable membrane, followed by EML or Riblath. The EML or Riblath should be stainless steel. Then a simple three coat s&c render and you're done.
Maybe bite the bullet and use one of the modern renders?
Click to expand...

Wouldn’t 2 coat be enough
 
I’m obviously aware wood and plaster don’t mix....but I’m just asking about the rend aid. You wouldn’t think you’d be able to skim onto tiles but you can if you green grit first. So it seems like a legit question to me!
 
exterior cement board - rend-aid - 2 coat sand and cement.
I know it sounds simple but what would the issue with this be?
 
luke105 said:
I’m obviously aware wood and plaster don’t mix....but I’m just asking about the rend aid. You wouldn’t think you’d be able to skim onto tiles but you can if you green grit first. So it seems like a legit question to me!
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Tiles dont contract and expand.
 
essexandy said:
Good thinking. Ply, ceramic tiles, blue grit and s&c. I just knew we'd work through this together.
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no, exterior cement board - rend aid - 2 coat sand and cement. Seem to me like those 3 materials would go together.
I’ve been in houses where someone has plyed over old door ways...skimmed over it. Then reskimmed the room and somehow it hasn’t cracked.
you can say ideas seem stupid fine...but things do work with a little experimenting
 
Fatarm said:
It's one of those threads where the op isn't liking the advice so is just going to keep on until someone tells him what he wants to hear :rolleyes:
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Really, I’ve had 2 answers which seem legit and they aren’t even the same process. Sometimes I think a lot of people on here are actually chancers and when they don’t know the answer to a question they try and jump on the person posting the thread like they are the best plasterer in the world.
move been on the trade a long time and seen plenty of dodgy methods that have actually worked.
ive never had a situation like this that I’m Posting my question on so it would be nice just for a simple answer.
 
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