What are the blue boards I see going up in building construction?

Answer by  JohnHolmes (2660)

This is a type of insulation that is used below the fiberglass which is also weather resistant. It is useful especially in very hot or cold climates to lower heating and cooling costs.

Answer by  ttownbeast (341)

The blue or purple drywall is a new popular alternative because it is a mold and pest resistant treated gypsum which is expected to last longer in moist weather environments than conventional untreated drywall ever could. You will notice some wood studs coated with a blue treatment now as well.

Answer by  builderboy (18)

If it is on the exterior of the building, it is 1" rigid insulation. Normally, a masonry veneer is installed over this insulation. The blue board gives additional "r"-value to the exterior wall.

Answer by  acespaid1 (29)

The blue boards that i see going up on construction sites are usually dry wall. I see those boards very ofter when traveling and i have made many assumtions.