Does expanding foam have any insulating properties?

Henrik · 4 Jan 2011

Hi,

I've used expanding foam in the past to fill gaps/holes etc., but have always wondered does it have any insulating properties? I've used Kingspan rigid insulation boards - is this made from the same material as expanding foam - in other words is the 'set' expanding foam providing thermal insulation, or is is just blocking drafts?

Appreciate all replies,

Henrik

TicklyT · 4 Jan 2011

It may be the same material, but the manufacturers wouldn't be able to claim insulation properties, or assign 'U' or 'R' values, as they have no control over where or how it is applied.

It's much the same as asking 'Can I replace a structural timber with a piece of wood cut from a tree?

studips · 4 Jan 2011

coulnd't give you a u or r value for it, but yes, it does insulate - obviously not in the same league as kingspan, but insulate it does.

Henrik · 4 Jan 2011

studips,

many thanks!

Henrik

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Does expanding foam have any insulating properties?

Henrik

TicklyT

studips

Henrik

DIYnot Local

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