Anyone knowledgeable about cavity wall insulation?
I’m weighing up having central heating system installed in a property as part of government green deal, part of condition is that cavity wall installation is installed.
I am sceptical as heard of the potential problems with damp, cracking etc which some reports say are connected.
Anyone had much experience?
you will need to do a lot of research on this subject as some blown in insulation can cause damp to bridge across. Now ther are firms that go around taking OUT faulty insulation Retro fitting is much harder than building it in during construction . Walls can be insulated on the outside but this is less effective. I sell loads of. PIR insulation but it all has to be built into a job
The firm is on about using bonded bead insulation which is mixed with a liquid, pumped in and then solidifies.
I know that if there are issues then getting it removed is a brick off job.
I’ve read if mixed wrong can over expand and cause cracking, along with bridging issue you mentioned depending if wall gets a lot of rain etc, also missing areas where material doesn’t reach.
My gut is saying stay clear.
i can think of a couple of jobs I did years ago I was cutting windows into . 2 properties >Both had insulated polystyrene beads in the cavities One had bonded poly There was no damp penetration the other one had unbonded poly . It was like snow wafting down the street … But none had damp penetration as poly is waterproof. I am sure everyone will have a different view of this.
Like a burst bean bag?!
I had a property for a short while which was filled with the fluffy stuff and this was permanently leaking out through the electric meter box, like a cotton wool dispenser! (No damp mind).
I wonder how does the operator know there are no gaps or voids in their work?
I dont see how they can while they are doing it, it’s bound to miss areas or get blocked somehow. They could use a thermal camera afterwards but it’s a bit late then?
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