Removing cavity insulation.

[mcmoby69]

Two storey extension, external wall riddled with damp over two floors.
I suspect the Ridge was leaking at some point but the tenant failed to notify. The adjoining neighbour had it fixed off her own back.

My question is how easy would it be to remove the cavity insulation.?
There is a window in the affected wall in the kitchen where I would think the cavity could be accessed and rake it all out. Does this sound feasible?

Thanks for any advice.

Forgot to say it's white fluffy stuff

 

[vinn]

A pic or two might help.

Damp CWI often slumps to the bottom area of the cavity - it also hangs up on cav ties.
CWI is often removed by opening the wall(s) at different places.
Thorough checks must be made to see that all the CWI has been removed - at the same time checks are made on the condition of the cavity ties, and any bridging debris at the base of the cavity.

Remedial work is often subsequently required on the interior plaster and any external render.

There are companies that specialise in removing CWI but how reliable they are is anyone's guess.

 

[mcmoby69]

Thank you for your reply. Am I right in thinking that if a damp clump sits on a wall tie then the damp could track across to the internal wall producing random damp patches upstairs?

 

[vinn]

Yes, quite posible.
But if the walls are Dot & Dabbed then moisture often tracks across the D&D adhesive dabs.

 

[mcmoby69]

Definitely not dot n dabbed. It's an old Victorian terrace with big rear extension.

Thanks for your reply