Hi,

Advice needed....

I'm renovating an old office and I'm intending to lay 22mm T&G
chipboard over the existing floorboards as they are very old, a little
uneven, and unsuitable for carpet tiles. I was wondering whether it
would be helpful to put 10mm-25mm of expanded polystyrene under the new
chipboard to take up some of the bumps and lumps of old nails, damaged
boards etc as well as possibly improving the sound insulation between
floors. Is there any possibility that the polystrene and the chipboard
could react over time? Would a wood pulp sheet material be more
suitable.

Best regards,

Andy

wrote:
Hi,

Advice needed....

I'm renovating an old office and I'm intending to lay 22mm T&G
chipboard over the existing floorboards as they are very old, a little
uneven, and unsuitable for carpet tiles. I was wondering whether it
would be helpful to put 10mm-25mm of expanded polystyrene under the
new chipboard to take up some of the bumps and lumps of old nails,
damaged boards etc as well as possibly improving the sound insulation
between floors. Is there any possibility that the polystrene and the
chipboard could react over time? Would a wood pulp sheet material be
more suitable.

Best regards,

Andy

I think you would be better of with sheet material layed down(chipboard)
rather than T&G but you will still have to knock in any protruding
nails/screws.

--
Sir Benjamin Middlethwaite

The3rd Earl Of Derby wrote:
wrote:
Hi,

Advice needed....

I'm renovating an old office and I'm intending to lay 22mm T&G
chipboard over the existing floorboards as they are very old, a little
uneven, and unsuitable for carpet tiles. I was wondering whether it
would be helpful to put 10mm-25mm of expanded polystyrene under the
new chipboard to take up some of the bumps and lumps of old nails,
damaged boards etc as well as possibly improving the sound insulation
between floors. Is there any possibility that the polystrene and the
chipboard could react over time? Would a wood pulp sheet material be
more suitable.
snip
I think you would be better of with sheet material layed down(chipboard)
rather than T&G but you will still have to knock in any protruding
nails/screws.

Actually, as long as they protrude less than the polystyrene is thick,
they'll just punch into it, with no impact on the chipboard.

In article
The3rd Earl Of Derby wrote:
wrote:
Hi,

Advice needed....

I'm renovating an old office and I'm intending to lay 22mm T&G
chipboard over the existing floorboards as they are very old, a little
uneven, and unsuitable for carpet tiles. I was wondering whether it
would be helpful to put 10mm-25mm of expanded polystyrene under the
new chipboard to take up some of the bumps and lumps of old nails,
damaged boards etc as well as possibly improving the sound insulation
between floors. Is there any possibility that the polystrene and the
chipboard could react over time? Would a wood pulp sheet material be
more suitable.

Best regards,

Andy

I think you would be better of with sheet material layed down(chipboard)

That's what he's using

rather than T&G but you will still have to knock in any protruding
nails/screws.

Why? They'll just dig into the EPS.

In article . com,
wrote:
I'm renovating an old office and I'm intending to lay 22mm T&G
chipboard over the existing floorboards as they are very old, a little
uneven, and unsuitable for carpet tiles. I was wondering whether it
would be helpful to put 10mm-25mm of expanded polystyrene under the new
chipboard to take up some of the bumps and lumps of old nails, damaged
boards etc as well as possibly improving the sound insulation between
floors. Is there any possibility that the polystrene and the chipboard
could react over time? Would a wood pulp sheet material be more
suitable.

Knock the nails in. Look at the sort of underboard solutions there are for
laminated floors. Decide what you want the material for - the polystyrene may
make most sense for insulation and be too expensive just to make it more even.

--
John Cartmell john@ followed by finnybank.com 0845 006 8822
Qercus magazine FAX +44 (0)8700-519-527 www.finnybank.com
Qercus - the best guide to RISC OS computing

I'm renovating an old office and I'm intending to lay 22mm T&G
chipboard over the existing floorboards as they are very old, a little
uneven, and unsuitable for carpet tiles.

It may be better to remove the floorboards before laying the chipboard.

Christian.

In article . com,
wrote:
I'm renovating an old office and I'm intending to lay 22mm T&G
chipboard over the existing floorboards as they are very old, a little
uneven, and unsuitable for carpet tiles. I was wondering whether it
would be helpful to put 10mm-25mm of expanded polystyrene under the new
chipboard to take up some of the bumps and lumps of old nails, damaged
boards etc as well as possibly improving the sound insulation between
floors. Is there any possibility that the polystrene and the chipboard
could react over time? Would a wood pulp sheet material be more
suitable.

This is how the ground floor of a mate's house is constructed, but over
concrete rather than floorboards. So there's no reaction between the poly
and chipboard. I doubt it will help much with sound insulation to you, but
might help the transmission of footsteps downwards. It should help with
heat insulation, though.

--
*I wonder how much deeper the ocean would be without sponges.

Dave Plowman London SW
To e-mail, change noise into sound.