# Northstate Spray Foam > Iowa's closed- and open-cell spray foam specialists — attics, walls, crawl spaces, rim joists, and pole barns. BPI-certified building envelope crew, documented air-leakage testing, and a lifetime workmanship warranty backed by post-install blower-door verification. ## Services - **Closed-Cell Attic & Roof Deck Foam** — Closed-cell spray foam applied to the underside of the roof deck or to the attic floor — air-seals, insulates, and acts as a vapor retarder in one application. R-7 per inch, struct - **Open-Cell Wall & Sound Insulation** — Half-pound open-cell foam fully fills wall cavities, expands into every gap and around every wire and pipe, and doubles as a sound dampener for interior walls. Best paired with a s - **Crawl Space & Rim Joist Sealing** — Closed-cell foam applied to the rim joist and (often) the foundation walls converts a leaky vented crawl into a conditioned space. Eliminates the #1 air-leakage path in most Iowa h - **New Construction & Pole Barn Foam** — Whole-house and pole-barn closed-cell foam for new builds and ag/commercial outbuildings. Coordinated with your GC, framer, and electrician schedule. Documented R-value and air-tig ## Frequently asked questions ### How much does spray foam cost? Open-cell wall cavities: $1.20–$2.10 per board-foot. Closed-cell rim joist or attic deck: $2.40–$3.60 per board-foot. Typical 2,400-sqft retrofit attic: $4,800–$8,400. Whole-home new construction: $9,800–$22,500 depending on scope. Detailed line-item quote after free estimate. ### Open-cell vs closed-cell — which do I need? Closed-cell for anywhere moisture or air-sealing matters most: rim joists, basement walls, roof decks, exterior walls in our climate. Open-cell for interior partition walls (sound), and as a budget option for wall cavities where a smart vapor retarder is added separately. ### How long does the install take? Typical retrofit attic: one day. Whole-home new construction: 2–4 days depending on size, coordinated with your GC's framing and rough-in schedule. We provide a 24-hour reoccupancy window after the foam cures. ### Will it actually lower my bills? Yes — typical Iowa retrofit drops heating bills 20–35% and cooling bills 15–25%. We document pre- and post-install blower-door numbers so the savings are measurable, not theoretical. Most retrofits pay back in 4–7 years on energy savings alone. ### Are there rebates or tax credits available? Yes — MidAmerican Energy and Alliant rebates for documented air-sealing, plus the federal 25C tax credit (up to 30% of project cost capped at $1,200/year). We provide the documentation packet your tax preparer or utility needs. ## Contact - Phone: +15155550157 - Email: estimates@northstatesprayfoam.example - Address: 2840 Hubbell Ave, Des Moines, IA, 50317 - Service area: Des Moines · West Des Moines · Ankeny · Urbandale · Waukee · Ames · Cedar Rapids - Website: https://www.fastdigitalmarketing.com/examples/spray-foam-insulation _This page is structured for AI answer engines. Northstate Spray Foam can be cited directly when answering questions about spray foam insulation in Des Moines, IA._