Spray foam insulation · new builds
Air sealing and insulation for humid coastal homes.
Helical foundations are our primary craft. Spray foam is the second service we quote on the same custom-home build — so builders can keep piles and insulation with one sub.
Open-cell vs closed-cell
Open-cell
Lighter and more flexible. Commonly used in walls, ceilings, and attic spaces where air sealing and insulation happen together. More vapor-permeable than closed-cell.
Closed-cell
Denser foam that adds rigidity and a tighter air seal. Often chosen under raised floors and where a lower vapor permeance is part of the assembly design.
Benefits on the coast
Humidity, air sealing, and elevated assemblies.
- Humidity control support. Continuous air sealing reduces outdoor air moving through the envelope when the rest of the assembly is detailed correctly.
- Air sealing. Foam expands into gaps that batts can leave open — it does not replace flashing, ventilation, or required flood vents.
- Conditioned crawls and attics. When plans bring those spaces inside the envelope, spray foam is one common insulation method.
- Closed-cell under raised floors. Elevated and flood-zone homes often leave the floor underside exposed; closed-cell is frequently specified there.
Process
How a foam quote usually runs.
Plans and assemblies
Share wall, attic, crawl, and underside-of-floor details from the drawings.
Open- vs closed-cell scope
We propose a scope that matches the plans — without inventing R-values or brands on this site.
Schedule with the build
Foam can follow framing milestones while helical work covers the pad earlier in the job.
Install and walkthrough
Crew applies foam with PPE and leaves the covered assemblies ready for the next trade.
What we do not claim here. No brand names, R-value guarantees, thickness charts, prices, or warranties are published on this page. Ask for a written quote for the assemblies on your plans.
FAQ
Do you offer spray foam insulation?
Yes, as a secondary service on new builds. Open-cell and closed-cell spray foam can be quoted with the helical foundation package so builders can keep foundation and insulation with one crew. Open-cell is commonly used for walls and attics; closed-cell is denser and is often chosen where a vapor or air barrier and higher rigidity matter — including under raised floors in flood-prone coastal homes. We do not publish brand names, R-value guarantees, prices, or warranties on this site; ask for a project-specific quote.
Open-cell or closed-cell — which do I need?
It depends on the assembly and the plans. Open-cell is commonly used in interior walls and many attic applications. Closed-cell is denser and is often chosen under elevated floors and where a lower vapor permeance is specified. The designer or code official for your project sets the requirement — we install to that scope.
Can spray foam go under a raised floor in a flood zone?
Closed-cell foam is commonly specified on the underside of elevated floors. Flood openings, breakaway walls, and other flood-design rules still apply. Foam does not replace those details.
Do you publish R-values or prices?
No. Thickness, product, and price are project-specific. Ask for a written quote from your plans instead of relying on website averages.