Re: Roof Insulation (Was Re: Halogens for thickies)

["Marcus Warrington" <marcusw@xxxxxxx>]

Its important to leave a gap between the slates and the insulation to
avoid problems.. 2" sounds about right.

The JABSQUEEZE stuff that B&Q sell is squeezable so that it holds
itself between the rafters. This makes fitting a lot easier, not sure
what's its insulation level is though. The other method I seen used is
to fix the panels in place with a small bead on expanding foam.

Each JABSQUEEZE  panel is 610mm x 402mm x 60mm and fits rafter spacing
320mm to 395 mm. A pack of 4 panels costs £9.65 at B&Q (.78m2 x .96m2)

IIRC any cables (lighting circuit) need to be protected in plastic
conduit and not allowed to touch the insulation. I assume that this
is because of potential heat build up in the cable causing the
JABSQUEEZE to melt ? If so I'm very wary of fitting halogen recessed
lights into it. Maybe I need to build small "boxes" into the
ceiling at
each light position ?

Marcus

> Mark,
>
> I believe there ought to be a 2 inch gap for ventilation.
> I've recently had the upstairs of my
> bungalow done. I have roof felt and 6 inch rafters, so I have
> 4 inches of insulation and 2 inches of
> gap. I've used Kingspan TP10 - not *the* best insulator, but
> a good second IIRC. (Problems with
> getting the other, whose name escapes me).
>
> This comes in 8'x4' sheets that you cut into shape. It cuts
> easily but is relatively strong. Fitting
> that stuff between the rafters is a slow, painstaking and
> messy job. But it works a treat.
>
> HTH
> Paul
>
> ----- Original Message -----
> From: "Mark Boyce" <mark@xxxxxxx>
> To: <ukha_d@xxxxxxx>
> Sent: Wednesday, February 26, 2003 9:28 AM
> Subject: [ukha_d] Roof Insulation (Was Re: Halogens for thickies)
>
>
> > Marcus Warrington <marcusw@xxxxxxx> wrote:
> > > Also what about recessed halogens in an attic ceiling. Our
ceiling
> > > has no felt so I was going to use JabbaSqueeze blocks to
insulate
> > > between the rafters.
> >
> > Hi all,
> >
> > I've been looking at doing the same insulation job as Marcus.
> >
> > We have a pitched roof where the tiles are laid direct onto the
> > rafters without any felt.
> >
> > I'd like to insulate the roof void to make it usable space.
>  The insulation
> > blocks that sit between the rafters appears to be the way
> forward but
> > I was concerned about condensation / ventilation.
> >
> > Have anyone done this or know what you're _meant_ to do :-?
> >
> > Mark


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