Where to get breathable membrane for insulation under floors?

I want to insulate a floating floor which is currently just joists and floorboards. part of that required putting in a reathable membrane to hold the insulation in place. I cant seem to find breathable membranes in any supplier, any ideas?
Cheers
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
I used garden netting from the garden centre to hold loft insulation in place under my floors.
Cheers Jonathan
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Or weed control fabric.
But netting is going to be cheaper.

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

I like the idea of netting, but doesnt stop the draughts :-/ I guess if I'm packing in the insulation it doesnt matter a whole bunch.
Will check out the tyvek though :)
Thanks guys
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Use a silicon gun to seal the floor gaps. easy.
--
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com ).
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Jimbo wrote:

Tylex?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
How about some gardening sheet to suppress / control weeds - comes in black, looks like fibreglass (but isn't) sheet and is porous... and probably pretty cheap
Nick
wrote:

hold
any
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.