Many wall/roof systems have more than one air barrier - what exactly defines what is inside the weather/air barrier - the most interior air barrier? a minimum perm rating?

Dear All Our project uses PP-R pipe (Polypropylene Random Copolymer) for chilled water piping. The PP-R pipes is connected together by welding.

I used a duct sealant with VOC = 49 g/l and I am not sure if it complies with IEQ credit 4.1, because I do not know in which category it falls in the table.

Hello, We are going to use epoxy sealant for joints between ceramic walls and floors in the showers, and I was wondering if this is acceptable if COV is less then 250g/l?

We are trying to submit credits IEQ4.1, 4.2, 4.4 and 4.5 under LEED for schools version 2009.

Hello, We are currently experiencing Fire-stopping sealants applied on the interior of the building Envelope on a Project we are working on.

Under what category would a 1-compnent mounting Polyurethane foam fall and consequently what would be the maximum VOC level allowed?

Does Insulating Foam (compressed low expanding type in a 12 oz. can) used for filling gaps around windows fall under IEQc4.1 as a Sealant?

We are going to be installing Vinyl fabric faced tackboards at our current school project, NC v.2009, and are having trouble finding a compliant Low VOC adhesive.

I have a special synthetic resin adhesive developed for flush door construction.