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stevetiler

stevetiler

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Steve
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Hi all,
A mate of mine has a flat that spans two houses (ie you can drive underneath it). The problem is the floor is concrete and gets very cold being exposed to the elements. He wants to insulate the floor from underneath . Any ideas on materials/method?

Many thanks Steve


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You could fix Celotex onto the underside. Two or three inch thick, foil tale over the joints.

It would be better if he could insulate the flooring inside, say one inch polystyrene under laminate of engineered flooring, but it depends on available space. You can get blue styrophene (sp), which is better for a given thickness.
 
Are there any flying freehold issues?
 
Another option is to get an insulated garage door with good sealing - This made a dramatic difference in my house.
 
Diving Pete said:
Another option is to get an insulated garage door with good sealing - This made a dramatic difference in my house.
Click to expand...

It's a flat! No garage!


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Comfortably Numb said:
You could fix Celotex onto the underside. Two or three inch thick, foil tale over the joints.

It would be better if he could insulate the flooring inside, say one inch polystyrene under laminate of engineered flooring, but it depends on available space. You can get blue styrophene (sp), which is better for a given thickness.
Click to expand...

Thanks for that! Not really an option to do it inside-tiled floors,height issues etc.


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Years back father fixed insulated board to top of garage roof to help insulate bedroom above it - can't remember exactly what it was, but was insulation on the underside and a weatherproof board on the outer side.
I'm sure there are even better modern insulating materials about now.
 
You can get plasterboard with foam attached, but I've not seen an external version yet.

It depends how pretty it has to look, underneath. Celotex has he best u value, but is covered in logos!
 
Definitely sounds like a job for external wall insulation (that's the three word search term he needs to use), not sure what grants are currently available for hard-to-treat installations (anything not loft or cavity wall insulation is HTT) but it's worth contacting a few specialists. Whatever he does, he should avoid the Green Deal option as the interest on these loans is very uncompetitive (as well as the general terms and conditions of the Green Deal having the potential to reduce the value of the property) and he should be able to get far better terms on a loan from a high street bank (and credit unions are worth approaching for this type of loan too). The total thickness (insulating panel plus screed) is about two inches.
 
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