We bought this house in 2007 by which time it had blown fibre cavity wall insulation. No idea when, but there might be some paper work hidden somewhere.
Does blown fibre settle with time, and if so does it need topping up?
Cheers
Dave R
Reading the Subject, I thought you were talking about fibre-optic cable that had been blown into ducting, and wondered why that might need topping up.
Oops.
Thank you for shedding some light on the confusing subject line, it was very illuminating!
My understanding is that yes, it does.
That's a thought - I'm close to a main railway that's on an embankment and some trains rattle the house. If the stuff settles down (rockwool in this instance) it might be low after 26 years.
My blown fibre is 41 years old and this thread has got me wondering if there's an insulation company which could Hoover it out and replace it with PU foam, anyone know?
Interesting website here, might be worth a read:
Thanks for that, it is worth reading.
If you can get hold of a thermal camera, you can image the wall and see where the hot/cold spots are. For example on mine I know one small section of wall has been missed.
That might give you some indication of whether there are sections that are better or worse than others - eg if it's settled then you might expect there to be a gradient bottom to top.
Theo
St. Albans DC (Liberal) are offering to loan out thermal cameras!
A tide mark, perhaps. Cool below a certain height on teh wall, hotter above that.
It looks like great fun.
And of course, the entry door is a disaster.
We could have much better IR cameras... but unfortunately, they are valued as munitions in smart weapons, and thus sensors "on the street" cannot be good enough to be re-purposed for making weapons. If it was not for that aspect, we could have much nicer cameras for the work, at a builders merchant.
Paul
It only talks about removal, though.
I was contemplating having more of the same material blown in to add to anything that had settled. First having a check to see if there were cold spots.
An IR camera has been mentioned.
Could an IR thermometer be used to give a first approximation of warm and cold spots?
Cheers
Dave R
It reads the same thing, but only one pixel. You ca scan manually & plot the picture, it's just slow. Or draw isothermal lines on the wall.
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