Planned
Metal Buildings & Pole Barns
Adhesion, condensation strategy, temperature and large-area value.
Project-led product research
Best Spray Foam by Project & Purpose
Start with the job, then compare only products that belong in the right category. Our project pages connect exact-product research with the technical limits that matter for that application.
Best by project
What are you insulating?
Nine assemblies, each stating the constraint that decides the product, the 2021 IRC provisions that apply, the tracked products that document the job, and where foam is not the answer.
Built
Best Spray Foam for Walls
Open or closed wall, the thermal barrier, the zone R-value target, and how many inches you actually have.
Read the pageBuilt
Best Spray Foam for Attics
Seal the floor with foam, fill it with blown insulation; foam the deck only for an unvented assembly.
Read the pageBuilt
Best Spray Foam for Garages
The separation wall and the ceiling under a bedroom are the job; an unconditioned garage is not.
Read the pageBuilt
Best Spray Foam for Rim Joists
The one place foam may stay bare, with the three numbers the code puts on it.
Read the pageBuilt
Best Spray Foam for Crawl Spaces
Unvented first, ignition barrier second, closed cell on the wall.
Read the pageBuilt
Best Spray Foam for Basements
Dry wall, canister scale, and the drywall that is also the thermal barrier.
Read the pageBuilt
Best Spray Foam for Sheds
Under 200 sq ft needs no permit; an unheated shed needs no foam; an occupied one needs ventilation while spraying.
Read the pageBuilt
Best Spray Foam for Cathedral Ceilings
Table R806.5 sets the foam layer by zone; the depth pushes the job to canisters.
Read the pageBuilt
Best Spray Foam for Vans & RVs
No code, thin ribs, a steel skin that sweats, and labels that say interior only.
Read the pagePlanned
Sound Control
Air sealing separated from verified acoustic performance; the open cell sheets carry the only sound figures.
Best by product and goal
Compare the right format
A product must pass its category gate before price, ratings or expansion claims can affect its position.
Best Spray Foam Insulation Kits
Our core like-for-like ranking for gun-applied surface insulation kits.
View current rankingBest Wide Spray Foam
Wide-pattern cans for smaller surfaces, repairs and touch-up work.
Compare wide sprayBest Task Sealants
Separate rankings for gaps, frames, pests, fire-block work and visible black foam.
Explore sealant typesBest Coverage
Advertised board feet translated by thickness and separated from usable-yield evidence.
Research queueBest Value
Exact-variant price, accessories, failure risk and cost per usable result.
Research queueBest Two-Component Kits
Portable systems separated by size, usable yield and on-ratio controls.
View the categoryTechnical decision support
Understand the numbers before you buy
These guides support product decisions; they do not replace the category and project rankings.
R-Value EvidenceCompare exact-product claims at the same stated thickness and evidence basis. Board Feet & CoverageTranslate thickness and area into comparable quantities. Insulation Foam vs Gap FillerAvoid buying high-expansion sealant for a surface-insulation job. Fire Claims ExplainedSeparate Class A, fire-block and firestop language.
Continue to product researchSee the provisional order and evidence limits for spray foam insulation kits.
Compare insulation kits