Insulating a crawl space

http://en.wikipedia.org/wiki/R-value_(insulation)

http://en.wikipedia.org/wiki/Radiant_barrier

http://air.thermofoil.fr/ Website

1. http://www.soprema.fr/ Makes Air T
   
2. hAir Thermofoil /FicheProdRecherche2.do?id=1443398504 Sells for 10 cents per square foot, offers vapour barrier and some insulation (10 mm) 
   
3. http://www.andresudrie.com/dossiers/Soprema_Air_Thermofoil.pdf
   
4. http://www.andresudrie.com/dossiers/Soprema%20Gold%20Thermofoil.pdf
   
5. http://produits-btp.batiproduits.com/Soprema/Air-Thermofoil/fiche/r?id=1443398504  Résistance thermique (R) : 0,20 m².K/W. 
   

http://www.bradfordinsulation.com.au/Products/Commerical/Thermofoil-Foil-Facing/MD-Foil.aspx Range of similar products.

1. http://www.reflectixinc.com/
   
2. http://www.reflectixinc.com/basepage.asp?PageIndex=674 How to apply
   
3. http://www.reflectixinc.com/basepage.asp?pageIndex=541 How to apply in a crawl space.
   
4. http://www.reflectixinc.com/images/uploads/diy%20application%20instruction%20pdf%20files/diy%20crawl%20space%200508.pdf
   
5. http://www.ujr.ca/EN/thermofoil.htm
   

Source used 10 cents per sq. foot.

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