"Raise the loft floor by 175mm on top of ceiling joists, ensuring
insulation is not squashed and U values are maintained. NOT suitable for
habitable rooms as the product is designed to fit on top of ceiling
joists in boarded lofts used as storage".


http://www.toolstation.com/shop/Cons.../sd2797/p44016


Interesting idea.

--
Dave - The Medway Handyman www.medwayhandyman.co.uk

The Medway Handyman wrote:
"Raise the loft floor by 175mm on top of ceiling joists, ensuring
insulation is not squashed and U values are maintained. NOT suitable
for habitable rooms as the product is designed to fit on top of
ceiling joists in boarded lofts used as storage".


http://www.toolstation.com/shop/Cons.../sd2797/p44016


Interesting idea.

Would you trust it?

--
Adam

ARWadsworth wrote:

The Medway Handyman wrote:
"Raise the loft floor by 175mm on top of ceiling joists, ensuring
insulation is not squashed and U values are maintained. NOT suitable
for habitable rooms as the product is designed to fit on top of
ceiling joists in boarded lofts used as storage".



http://www.toolstation.com/shop/Cons.../sd2797/p44016


Interesting idea.

Would you trust it?


Maybe, on two provisos:

1) It is screwed to the joists below to prevent lateral slippage

2) The false floor on top goes "wall to wall" to prevent shear of the whole
structure.

The reason for that conslusion is it is approximately the same structure as
a computer room false floor and they are OK unless you take out a big square
and leave a small island dangling in the middle

--
Tim Watts

"The Medway Handyman" wrote in message
...

"Raise the loft floor by 175mm on top of ceiling joists, ensuring
insulation is not squashed and U values are maintained. NOT suitable for
habitable rooms as the product is designed to fit on top of ceiling joists
in boarded lofts used as storage".


http://www.toolstation.com/shop/Cons.../sd2797/p44016


Interesting idea.

--
Dave - The Medway Handyman www.medwayhandyman.co.uk

What's the recommended spacing? Not going to be that cheap. Wouldn't a
lightweight fabricated I or rolled U-section be better?

newshound wrote:



"The Medway Handyman" wrote in message
...

"Raise the loft floor by 175mm on top of ceiling joists, ensuring
insulation is not squashed and U values are maintained. NOT suitable for
habitable rooms as the product is designed to fit on top of ceiling
joists in boarded lofts used as storage".



http://www.toolstation.com/shop/Cons.../sd2797/p44016


Interesting idea.

--
Dave - The Medway Handyman www.medwayhandyman.co.uk

What's the recommended spacing? Not going to be that cheap. Wouldn't a
lightweight fabricated I or rolled U-section be better?

As we're "back to basics" here, a cross joist is the usual solution - only
downside is the fact it makes running pipes harder.

--
Tim Watts

On Fri, 3 Jun 2011 23:12:42 +0100, newshound wrote:

What's the recommended spacing?

It doesn't say but I wouldn't be happy at much over a foot. I guess
you actually put them along the joints in the 22mm chipboard loft
boards so that's every 400 odd mm. There will be movement in those
boards...

They would also have to be fixed to the ceiling joists and how do you
fix the loft boards down? Screw into the tops of these things?

Any why 175mm? OK on top of your standard 100mm ceiling joist you get
275mm, just a little less than the recomended 280mm of insulation but
boarded over you don't need 280mm as the boards also provide
insulation...

I did some vague maths on this the other week. 100mm glass fibre
covered with 22mm chip is not that far short of the recomended level,
certainly as good as 200mm glass fibre and not worth the agro of
fitting say 50 or 100mm cross joists IMHO.

--
Cheers
Dave.