Help req Insulating loft

[squigles]

Hi

I am wanting to insulate the loft in our 1930's house, I have been looking at various sites etc. Now apart from my brain having shrunk to the size of a pea, I know that I can't insulate the floor of the loft (not enough room between the floor and celling underneath.

So I want to insulate under the roof tiles, now this is where it gets me. What are the options

The roof is fully tiled (as you'd expect) however the felt isn't directly under the tiles, it's like been put on as an after thought.

Any help or advice would be most welcome

 

[masona]

The velux window should have a double trimmers as well double roof rafters, are you having a loft conversion up there?

 

[squigles]

masona

No just making it a more usable space rather than just a dumping ground. Double Trimmers Those were installed by a roofing company who did some repairs to the roof at the start of the year. Are they installed incorrectly then Not sure if it helps but they are conservation type (as we live in a conservation area).

 

[masona]

Have a read here,

//www.diynot.com/forums//viewtopic.php?t=163825

Use the 50mm insulation slabs between rafters so the air flow is at the back but make sure there's a gap at the top and bottom for circulation air flow, get rid of the roofing felts first.

 

[squigles]

Thanks masona

Looks like a call to the roofing company to get them back out to finish the job

I am in the process of removing all the old felt, how much of a gap should be left

After the slabs are installed, would it be possible to cover with plasterboard or any other kind of board

Cheers

Andy

 

[masona]

I am in the process of removing all the old felt, how much of a gap should be left

Insulation slabs level to the front and back where the tiles is should be 50mm gap

After the slabs are installed, would it be possible to cover with plasterboard or any other kind of board

Best to use plasterboards as it's fire resistance, if you put plasterboards right at the top then you will need to fit top ridge vents tile to allow ventilation