Insulating a Roof Gap

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awemawson:
Bertie, I've been thinking of slit pipe insulation with one bit entering the slit of the other to form a sort of figure of eight - the installation issue though I think is the real issue. If it is just a sausage in (say) 1 metre lengths I can temporarily pin it to a long pole and poke one end in place, then work along shoving the rest into the gap (there are light fittings and things to work round stopping me using one long length. It needs to be a good 'shove fit' (engineering term !) so it doesn't all fall out in a high wind :)

If I could find some 6" thick durable foam (polyethylene maybe?) sheet and cut 6 x 6 bars that would probably do

awemawson:

--- Quote from: Stuart on May 21, 2015, 12:30:24 PM ---Andrew

Look here

http://www.irrigationonline.co.uk/black-armaflex-rubber-pipe-insulation-lagging-13mm-wall-thickness/

They have it up to 4 inches on the drop down list to bulk it up one inside the other

Stuart

--- End quote ---

Now that's pretty close in the 4" size with the 1/2" walls giving 5" :thumbup:

But £17 metre :bugeye: I only need about 18 metres or so so there £300 gone bang :( Now how much heat am I loosing and how much does £300 buy :scratch:

DavidA:
Using polythene sheet, roll up some glass fibre loft insulation into sausages and stuff it into place. Then foam fill the gaps.

You can make the sausages any diameter you want.

Dave.

DMIOM:
Andrew,

Do you clip your own flock? if so, do you have any of the hessian wool sheets we use to pack the fleeces in? - if so, a few of them split & cut could produce the material for a non-slippery sausage skin - just stuff them & tack with a sack needle & binder twine. Filling - could be fibre glass or straw or hay? but what do you get for wool....?

Dave (IOM)

awemawson:
Dave and Dave,

All good suggestions,but this all needs stuffing in on the end of a 15 foot long pole - can't get close enough to squirt squirty foam in there :(

Yes the wool goes for peanuts - in fact I give it away to a friend who has many more sheep than I, as it costs more to get it to Ashford (the local collection point) than I get for it. 'Wool sheets' (sewn into bags) are man made like jumbo bag material these days. Though I do have some Hessian sand bags thinking about it. (used to patch up bridge revetments - fill with dry mix concrete - it sets when it gets damp, and the bag rots away leaving a not unattractive finish.

(Sheering is set for 1st June if anyone wants a laugh - extra hands always welcome)

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