Metal building spray foam insulation

Why metal buildings sweat here

A steel roof in this climate runs hot in the afternoon and hits the dew point at night. Moisture shows up on the panel, the purlins, and whatever is stored underneath. That is the reason for foam on a metal building, not a thicker batt in a house attic.

Closed-cell foam against the panel is the usual approach. It can be the vapor retarder, and it does not hold water against the steel the way open-cell can. Open-cell on bare metal is a wet panel waiting to happen. We do not use it there.

The code row is a liner system

Table C402.1.3, Climate Zone 1, metal building roof, is R-19 plus R-11 with a liner system. That is the prescriptive path. Spray foam is not that liner. Foam is allowed when the assembly meets the U-factor path for that roof. A one-inch or two-inch coat does not.

The thickness is taken from the product data and the U-factor the plans call for. We do not invent a thickness to match a liner system we did not install. Purlins and girts still bridge heat if the foam stops at the flange. The foam has to be detailed around the steel, not just sprayed until the drum is empty.

Barns, shops, and arenas

The metal buildings we actually see out here are barns, equipment shops, arenas, and small warehouses. Wellington has the barns and arenas. Loxahatchee and Jupiter Farms have the acreage shops. Parkland is mostly houses, with metal buildings on the larger lots.

An occupied office inside a metal building still needs the thermal barrier over the foam. A barn used for storage is a different exposure than a room people sit in. Tell us which one it is.

The other commercial jobs

• Commercial attic insulation
• Commercial batt insulation
• Commercial spray foam insulation

Metal building spray foam insulation by city

• Metal building spray foam insulation in Parkland
• Metal building spray foam insulation in Wellington
• Metal building spray foam insulation in Loxahatchee
• Metal building spray foam insulation in Jupiter Farms
• Metal building spray foam insulation in Jupiter
• Metal building spray foam insulation in Tequesta
• Metal building spray foam insulation in Boca Raton
• Metal building spray foam insulation in West Boca Raton
• Metal building spray foam insulation in Delray Beach
• Metal building spray foam insulation in Boynton Beach
• Metal building spray foam insulation in Royal Palm Beach
• Metal building spray foam insulation in West Palm Beach
• Metal building spray foam insulation in Palm Beach Gardens
• Metal building spray foam insulation in Lake Worth Beach
• Metal building spray foam insulation in Deerfield Beach
• Metal building spray foam insulation in Coral Springs
• Metal building spray foam insulation in Plantation
• Metal building spray foam insulation in Fort Lauderdale