Insulation that Lasts a Lifetime Spray Foam Insulation
Looking for an insulation option that actually does what it’s supposed to? Our closed-cell spray foam insulation doesn’t just fill the gap—it seals it, strengthens it, and keeps energy bills down for the long haul. We’re here to help builders and property owners in Idaho and Washington get it done right the first time.
Why Choose Spray Foam?
Spray foam insulation isn’t just another way to fill a wall. There are many reasons it's the smarter choice for insulation in any project.
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Seal Tight and Stop Air Leaks
No gaps, no drafts — just a tight building envelope that keeps energy where you want it.
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Strengthen Your Structure
Closed-cell foam adds real rigidity to walls and roofs, up to 300x the strength of plywood.
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Block Moisture and Mold
Built-in vapor barrier that keeps out water and pests.
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Boost Energy Efficiency
Up to 30% more efficient than traditional insulation. Save money on heating and cooling.
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Lasts for Life
Doesn’t sag, settle, or break down over time — just long-term performance you can count on.
Applications for Spray Foam Insulation
Residential
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Walls and ceilings in new builds or remodels
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Attics to keep heat and cold out
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Crawl spaces and basements for moisture and mold control
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Roofs for added insulation and structural support
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Commercial
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Offices and storefronts to meet energy codes
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Warehouses and storage areas for better climate control
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Retrofits to tighten up existing buildings
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Industrial
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Metal buildings and shops to cut drafts and improve comfort
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Exposed foam applications that need fireproof coatings
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High-traffic workspaces needing tough, long-lasting insulation
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Agricultural
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Barns and outbuildings for year-round protection
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Workshops to keep tools and equipment safe
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Storage areas that need pest and moisture control
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Is spray foam right for every job?
At 509 Spray Foam, we’re all about finding the best fit for your build — even if it’s not spray foam. Let’s talk through your project and figure out what will work best for you.
Frequently Asked Questions
How long does spray foam insulation last?
When it’s done right and stays dry, closed-cell spray foam can last for the lifetime of your building — no sagging, no settling.
Will it help keep my crawl space or basement dry?
Yes! Closed-cell foam is a moisture and vapor barrier, so it helps block out water and keep mold at bay.
What’s the difference between open-cell and closed-cell foam?
Open-cell is softer and cheaper, but doesn’t seal or strengthen as well. We use closed-cell because it seals better, adds structural support, and lasts longer.
Can it help with noise too?
Definitely — spray foam can help reduce sound transfer between rooms or from outside.
Is spray foam really worth the investment?
For most projects, absolutely. It’s more expensive up front, but it’s one of the few upgrades that pays for itself over time with energy savings and lower maintenance.
How soon can I get back in after install?
Most jobs are good to go within a day or so. We’ll talk you through any safety or ventilation needs before we start.
Roof Coatings
Protect your roof and extend its lifespan by 20+ years. Our silicone and elastomeric coatings flex, seal, and keep the elements out.
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Add a layer of defense against fire. Our intumescent and flame-retardant coatings help meet code and provide critical peace of mind for exposed foam in commercial or industrial spaces.
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Let’s Make Your Build Even Better
We’re here to help you get it done right—with insulation that works harder than any other material on the market. Let’s talk about how spray foam insulation can work for your next project.
