Insulation Material » poly sheeting http://insulationmaterials.info Tue, 27 Jul 2010 12:20:57 +0000 http://wordpress.org/?v=2.8.6 en hourly 1 If I use foam insulation in the exterior walls do I need a vapor barrier? http://insulationmaterials.info/if-i-use-foam-insulation-in-the-exterior-walls-do-i-need-a-vapor-barrier.html http://insulationmaterials.info/if-i-use-foam-insulation-in-the-exterior-walls-do-i-need-a-vapor-barrier.html#comments Fri, 21 Aug 2009 17:21:10 +0000 Walter Franks http://insulationmaterials.info/if-i-use-foam-insulation-in-the-exterior-walls-do-i-need-a-vapor-barrier.html http://insulationmaterials.info/if-i-use-foam-insulation-in-the-exterior-walls-do-i-need-a-vapor-barrier.html/feed 2