Wall system / Green Building & Sustainable Home Renovation Information & Advice

...wall system should have one vapor barrier, but can have many air barriers. A vapor barrier can act as a very effective air barrier, but an air barrier does not (and should not) always stop vapor from difusing. A wool sweater for example, is a good choice of natural insulation and will keep you warm when there is no air...

...wall, all the insulation on the walls and floor (or crawl-space ceiling), drainage, exterior damp-proofing membranes and weeping tile, then you need to build a floor over top of it. The comparable stages of slab-on-grade construction would be laying down insulated forms, adding rebar plus mesh and then pouring concrete...