Solid Floor Underlay Options - Builders Papers with bitument?

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Hello,

Looking from some free advice (isn't everyone).

Just about to put down a solid wood floor over existing floor boards and decided that I would use a builders papers to act as a barrier followed by secret nailing.

(I had thought about putting down a 2m foam underlay, then secret nailing but from reading various forums it states this isn't any use for heat loss and will only add movement - please correct me if this is wrong and I can use 2m foam followed by secret nailing).

Question I have, the only builders paper I can find at short notice is this one from wicks below (yes - very expensive but at short notice all I can get). It states this is bitument lined (now 100% sure what this is) and worried that it won't be breathable i.e. it acts as a plastic sheet?

http://www.wickes.co.uk/NDC-Bitumen-Backed-Building-Paper-10m-x-1m/p/141075#tab-details_content

Would I be ok with this?

Cheers

Pedro.



Read more: http://www.diynot.com/diy/threads/forum-rules-general-info.19448/
 
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ree

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Dont use the bitumen lined paper. use the cheapest rolls of building paper or roofing felt that you can buy.

check with the wood flooring Mfr's for the installation instructions ref any foam underlay.
 
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Thanks for reply. I'll have a look at roofing felt. I take it tho the bitumen stuff would do the job tho...albeit it's pricey?
 
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barrier followed by secret nailing.

Barrier for what?

Is this a suspended timber floor with no insulation?

If you want a barrier for airtightness purposes, then as ree said, roofing membranes will be breathable but somewhat airtight (you can get specific airtight breathable membranes, waste of money for this situation).

If you have no insulation then you don't want to completely remove droughts or you may have condensation/mould issues around skirtings n such.
 
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Thanks. No insulation.... Have got a breathable membrane sorted.

Makes sense to allow air to floor a little.

God bless the internet for having various bits of advice.... :)

Cheers gents.
 
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If it is not to late, then seriously consider insulating, the payback is typically less than 10 years and the added comfort will be worthwile..
 
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Yes, I know this post is nearly 3 years old...

...Pedro, what did you use under your floor... did you go builders paper or roofing felt?
 

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