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Opinion on renders

K

Kennyd163

Member
Location
new addington
Country
England
Hi all.

Bit of a back story to build the picture.
I brought a house a few years again and whilst it has many problems, is a lovely family home in a quiet little village. Electrics where upgraded, plumbing is the next big project as still on oil and there's a list that the wife adds to almost daily of jobs that she would like to be done.
Our big problem is that the chimney is leaking on the surface within the loft, damaged two bedroom ceilings so now have storage boxes up there to collect any ingress. We have a log burner so we can't just get rid of the chimney.
I've had the lead work redone and have had a coat of what I want to say, looked like PVA glue, to the stack but the water has still managed to get in.
It's been suggested that the bricks have become too porous and a render would be the best option. I've been quoted for monocouche render whilst another roofer/ plasterer has said to stay away from monocouche and opt for a full silicone render.

What would you lot recommend (other then selling my house and getting one that doesn't have a chimney). The quote isn't extortionate and includes the contractor arranging scaffolding but don't want to go down a road with this render of it's no good.

Cheers
 
Making sure any ingress is stopped first,...

I would have any brickwork checked to see if it isn't crumbling due to water damage. You don't want to slap render over anything that is already badly damaged. Ive done work to damaged brickwork in a chimney stack and it involves knocking the damaged bricks out and replacing.
Also any rafters/joists checked for water damage.
 
FH is right. You need to stop the water coming in. I don't know the age of your house, but if it it needs work done on flashings etc., I imagine it it pre '50's. My suggestion would be to get your drone out and get a close look at the flaunching on the top of the stack. But you probably don't have a drone, like I don't either 😆 . I've never heard of water collecting through brickwork, however fractured/porous. You may get damp, but not a flow of water.

If the brickwork really is letting water into the roof space, I would suggest you have the chimney stack rebuilt, as that will do more damage to your ceilings if the bricks are that rotten and it collapses. People have been killed when their chimney collapses during high winds and lightning strikes.

Render, of any kind, on an older building is only done to mask a problem, and it will only temporarily address the problem.

If you don't know anyone with a drone, pay for a chimney survey, it's relatively cheap.
 
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