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Do I need to board over Celotex being used for storage in loft?

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johnboy

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Jun 5, 2011, 6:18:12 PM6/5/11
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I have a section of my loft which I use for storage, nothing
particularly heavy just the usual bits and bobs.
I am going to put 100mm celotex/Kingspan down for insulation and was
wondering if I need to put any board on top?

Tim W

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Jun 5, 2011, 6:44:06 PM6/5/11
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"johnboy" <jgk...@hotmail.com> wrote in message
news:e1423135-99f7-4a7d...@gc3g2000vbb.googlegroups.com...

The simple answer is - if you aren't going to damage it you don't need to
protect it.

So just sliding a cardboard box over it - no problem.
Things which will rip the foil and tear the foam - better to protect it.

Tim W


harry

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Jun 6, 2011, 1:37:25 AM6/6/11
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Depends on the amount of traffic you envisage. If you will be walking
on it more than infrequently, then yes it needs boarding

harry

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Jun 6, 2011, 1:39:02 AM6/6/11
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On Jun 5, 11:18 pm, johnboy <jgkg...@hotmail.com> wrote:

BTW the stuff needs to be continuously supported if you put any load
on it.
I have it between and on top of the joists.

johnboy

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Jun 6, 2011, 7:47:11 AM6/6/11
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There are some boards already on the joists so it will be supported.

Would hardboard be sufficient to protect the insulation? I don't think
I'd be storing anything that would be likely to get through that.

is there some special tape for sticking sheets of insulation together?
I'd be using 8 * 4 sheets but would have to cut them into 8 * 2 sheets
to get through the loft hatch.

Chris J Dixon

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Jun 6, 2011, 2:42:24 PM6/6/11
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johnboy wrote:

>Would hardboard be sufficient to protect the insulation? I don't think
>I'd be storing anything that would be likely to get through that.
>
>is there some special tape for sticking sheets of insulation together?
>I'd be using 8 * 4 sheets but would have to cut them into 8 * 2 sheets
>to get through the loft hatch.

The centre area of my loft was already boarded with a mixture of
materials that had accumulated over the years.

I then covered this with two layers of Knauf space board
insulation,(1200 mm x 500 mm x 50 mm) with the joints staggered.

As I needed to hold everything down, and the insulation will dent
from point loads such as bony knees and storage box feet, I
covered it with hardboard (full sheets cut across into 500 mm
strips {plus off cuts} at B&Q) and screwed it all down to the
boarding using M6 x 120 mm woodscrews which were on offer at
CPC.

I was very pleased that the installation went exactly as planned.
I did drill pilot holes, but the screws would probably have
self-drilled.

The only slight problem, which became apparent after a few weeks,
is that (despite the fact that the hardboard spent some of the
autumn stored in the caravan, until I could get the job done) the
sheets have expanded slightly and bowed a little. I haven't been
up there recently to see if the summer weather has shrunk them
back.

Chris
--
Chris J Dixon Nottingham UK
ch...@cdixon.me.uk

Have dancing shoes, will ceilidh.

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