Foil for attic

aFlabbyPanda

Hi,

We moved into a house which has an attic conversion done years ago. It insulated somewhat but its freezing at night.

I was tempted to either get foil or bubble foil to cover the vertical & horizontal joists pictured below. I was going to leave of the pitched joists for now.





Would either of the following products be OK for this or should I get something else?

* Roof Vapour Barrier Insulation Foil Membrane 90gsm Metallized Aluminium 1.5m X 50 meters - Polyrope
https://polyrope.ie/home/17-roof-vapour-barrier-insulation-foil-membrane-90gsm-metallized-aluminium.html

* Double Layer Bubble Foil Insulation 1.2m x 12.5meters - Polyrope
https://polyrope.ie/home/94-roof-vapour-barrier-insulation-foil-membrane-90gsm-metallized-aluminium.html

I'm no expert but I'd guess your problem is in the areas you can't see.
Behind the ceiling of the conversion.

Calahonda52

The photos, while they are not great, don't point to a massive insulation deficit so you need to look at airtightness, what insulation if any is in the sloped and flat part of the attic, as well as any gable wall.
It looks as if the the eaves are fully stuffed, are the soffits ventilated?

what is the insulation on the ceiling?

aFlabbyPanda

I'll took at look in the crawl space between the ceiling and the roof, there is the same insulation there but unsure about the sloped part. I couldnt see into it. I'll try to get some more pics and get further down along the wall later to see.