The questions crews ask at the counter.
Set counts, grades, drum storage, rig settings, gun parts, code barriers. Short answers with the numbers, from the data sheets and from people who spray.
How thick can you spray closed cell in one pass? Lifts, exotherm and shrink-back
Thermoseal HFO will go on well past 2 inches in a single pass without scorching, but about 2 inches a lift is still what we recommend.
Fusion AP gun maintenance: what to replace, when, and the parts that fit
Change the mixing chamber and, with it, the side seals, o-rings and screens.
How spray foam is sold: sets, pallets, truckloads, and how a contractor rate works
Spray foam comes as a set of two 55-gallon drums, bought by the set, by the pallet or by the truckload.
Ignition barrier, thermal barrier and intumescent coating: what the inspector asks about spray foam
Spray foam inside a living space needs a 15-minute thermal barrier, usually half-inch gypsum.
Open cell or closed cell spray foam: which one for the job
Closed cell (Thermoseal HFO, R-7.4 per inch, 2 lb density) where you need strength, a vapor retarder or a high R-value in a thin cavity.
Reading bad spray foam: voids, shrink-back, dark cores, fishy smell, and what caused each
Almost every foam defect traces to one of four things.
Rig settings for Thermoseal HFO and Thermoseal 500: heat, hose and pressure
Start Thermoseal HFO at 110 to 120°F on the primary heater and hose and 1,200 to 1,450 psi, with drums warmed to 77°F.
How to store spray foam drums: temperatures, shelf life and what kills a drum
Keep A-side and B-side drums between 50 and 75°F, use the B-side within 180 days and the A-side within a year, and warm both to about 77°F before spraying.
Summer grade or winter grade spray foam: when to switch
Switch on substrate temperature, not the calendar.