Hull sits at the far edge of Sioux County, where the continental climate hits hard: cold winters with wind off the Missouri River basin, hot humid summers, and seasonal humidity swings that push moisture through attics and rim joists twice a year. Most homes here are older, built when insulation standards were loose and attic ventilation was thought to solve everything. It did not.
Homeowners in Hull (51239) call Sioux City Spray Foam Insulation because we understand the specific problem: a leaky attic that cannot keep up with that seasonal swing, a cold rim joist bleeding heat all winter, and outbuildings like shops and barndominiums that sweat without closed-cell foam. We have been serving Hull and the surrounding Sioux City area since 2015, and we know which jobs work and which ones do not.
Spray Foam Insulation in Hull (51239)
Hull's housing stock runs to older homes on smaller lots, many with full basements and rim joists that sit cold and damp through the winter. Attics here are typically vented, which sounds right but leaves them hot in summer and cold in winter, with insulation that has settled flat over decades and lost half its R-value. Closed-cell foam on outbuildings and farm structures is less common but absolutely necessary: a metal building or barndominium without closed-cell foam will sweat condensation on the inside when the humidity reverses between seasons, and the insulation will fail.
Our team has been installing closed-cell and open-cell spray foam in attics, crawl spaces, rim and band joists, and metal buildings across Hull and the Sioux City area for over nine years. We measure every job on site, specify R-value and thickness in writing, and use mechanical ventilation during cure so your home is safe to re-enter within twenty-four to forty-eight hours.
Our services in Hull
- Attic Spray Foam Insulation in Hull · Sioux City attics swing between hot humid summers and cold windy winters along…
- Closed Cell Spray Foam Insulation in Hull · Closed cell foam stands up to the damp basements and hillside lots found across…
- Open Cell Spray Foam Insulation in Hull · Open cell foam fills attic rafters and interior walls across Sioux City's…
- Wall & Injection Foam Insulation in Hull · Wall injection foam fills closed cavities in older homes above downtown Sioux…
- Crawl Space Spray Foam Insulation in Hull · Some newer additions toward Sergeant Bluff sit on crawl spaces that trap humid…
- Rim Joist & Band Joist Spray Foam in Hull · Rim joists lose heat fast in Sioux City's full basements…
- Garage Spray Foam Insulation in Hull · Garages across Sioux City take the full swing from hot humid summers to cold…
- Metal Building & Barndominium Spray Foam in Hull · Shops and farm buildings across Woodbury and Plymouth counties sweat without…
- Commercial & New Construction Spray Foam in Hull · Commercial projects across Siouxland face the same hot humid summers and cold…
- Insulation Removal in Hull · Older homes in the hills above downtown and in Morningside often carry…
- Insulation Replacement & Re-Insulation in Hull · After removal, older Sioux City attics need fresh insulation for the next…
- Air Sealing in Hull · Air sealing stops the stack effect that pulls cold winter air through top…
How a Job Works in Hull
We start with a free on-site assessment. You walk us through the problem: a room that will not heat, a cooling bill that has doubled, condensation in the attic or crawl space, or insulation that has gotten wet and has to come out. We measure the space, ask about your current heating and cooling system, and explain what closed-cell foam does versus open-cell, and when blown-in is the right answer instead. We give you a written estimate with R-value and thickness spelled out, so you know exactly what you are paying for.
The work itself depends on the job. For an attic, we typically seal air leaks at the top plates and around penetrations first, then spray foam in passes to build up the specified thickness. For a rim joist or crawl space, we may have to remove old, damp insulation before we spray. For a metal building or barndominium, we spray the underside of the roof deck or the exterior walls. We use our own equipment and crews, not subcontractors, so the work stays consistent.
When we are done, we clean up and walk you through the cured foam. Your attic or crawl space will be dry, sealed, and ready to hold temperature through the winter and summer both.
Attic spray foam in Hull typically runs from $1.50 per square foot for open-cell to $1.20 per board foot for closed-cell, depending on the R-value you need and whether old insulation has to come out first. A 1,200-square-foot attic with removal and closed-cell foam to R-40 will usually land between $3,500 and $5,500. Rim and band joist work starts around $650 for a small section; a full basement perimeter can run $2,000 to $4,000. Crawl spaces start at $2,500. Wall injection foam and metal building work are priced per square foot based on access and thickness. The key cost factors are the area to cover, the R-value and thickness you need, whether you need removal first, and how easy we can reach the space. Call us at (712) 522-2693 for a free estimate. We will measure your home and give you a firm price in writing before we start.
✅ Written Estimates with R-Value & Thickness Specs, fully insured for work in Hull and nearby areas.
