Closed-cell foam insulation in Castle Rock CO - rim joists that stop letting cold air in
Cold floors and a draft along the basement walls? We spray dense foam that stops the draft and keeps that part of the house warmer.
Is closed-cell spray foam right for your basement or crawl space?
Closed-cell foam insulation is a dense, rigid foam we spray onto rim joists and foundation walls in Castle Rock homes. At its usual thickness, one layer stops air leaks, slows heat loss and holds back moisture vapor, the damp air that works its way into framing.
Most people call us about cold floors over the basement, a draft along the baseboards or a room over the garage that never warms up. The leak is often at the rim joist, the band of wood sitting on top of your foundation, or in the foundation walls we foam as part of basement insulation. Your price depends mostly on how many square feet need foam, how thick it goes and how easy those spaces are to reach. Old insulation that has to come out first, or a water problem that has to be fixed, adds to it. Those same things set the schedule, along with any permit the job needs and when your household can plan to be away, and I'll walk you through all of it when I come out to look and write your estimate.
How we install closed-cell foam insulation
Closed-cell is the foam we reach for on rim joists and foundation walls. Before anyone sprays, I look closely at those walls for stains, damp spots and white mineral crust, because foam laid over a leak just hides it. If anyone at home has asthma or allergies, I'd rather talk it over before we book than after, and we settle the re-entry time, meaning when it's safe to come back in, before the day is set. On the day, our installers clear the area, pull out old batts stuffed in the rim joists so the foam bonds to bare wood, and cover anything that shouldn't get foam. Then they spray in passes until the foam reaches the thickness on your estimate, seal around the pipes and wires running through, trim it back and clean up.
Closed-cell isn't the answer everywhere. In an attic roofline or an interior wall, where there's room for a thicker layer and moisture isn't the worry, open-cell foam insulation is lighter and usually costs less. In plenty of attics, sealing the gaps and topping up loose fill beats any foam unless your ductwork runs up there. Property managers call us for commercial insulation too, and we work in the same order on offices and metal buildings.
Why Castle Rock homeowners call us for closed-cell foam
I write your estimate myself
I come out to look at your rim joists and walls and write the estimate myself, and our own installers do the spraying. The person who saw your house decides what goes on it, and I'll explain what I'm seeing as many times as you need.
In business since 2017
I started this business in Castle Rock in 2017 after years of spraying foam on warehouses, offices and metal buildings for a big commercial insulation company. That background is why we always fix a problem before we cover it up.
Licensed and insured for every job
We're licensed and insured, and we're glad to show you the paperwork before you sign anything. Spray foam is chemical work done inside your house, so you should know who's covered if something goes wrong.
Castle Rock permits handled before spraying
The Town of Castle Rock issues building permits, and a permit has to be approved before work starts. We check which office covers your address, and when a permit is needed we apply for it and set up the inspections. If you'd like to ask the Town something yourself, the Building Division takes questions at 720-733-3527.
On closed-cell foam, the most important step is finding the water before the foam goes on. Call (720) 408-0974 or send us your project details with the spaces you want insulated, any damp spots you've noticed and any health concerns at home, and I'll come take a look.
Get an on-site estimate for closed-cell foam
We'll reply within one business day to set a time. I'll come out, look at your rim joists and foundation walls, and write the estimate myself. It's free, and you're under no obligation to book.
What closed-cell foam looks like
Common questions about closed-cell spray foam
How much does closed-cell spray foam insulation cost in Castle Rock?
In Denver, closed-cell spray foam usually costs about $1 to $1.50 per board foot, which is one square foot of foam one inch thick. Thicker foam, more wall to cover, hard-to-reach spots and any prep or removal all raise your number, and the Town also collects its building use tax on construction materials whether or not the job needs a permit. Your own figure comes from the on-site estimate.
How long do you have to stay out of the house after spray foam insulation?
Plan to be out of the house for at least 24 hours, because product-safety guidance for spray foam advises leaving the home during installation and for at least that long afterward. That includes the kids and pets, so line up a place to stay before the day is booked. The same guidance says to talk through safety steps with your contractor, and we do that with you before we set a date.
Is spray foam safe if someone in my family has asthma or allergies?
People with asthma or allergies should check the product information carefully before choosing spray foam, and some choose a different insulation. Product-safety guidance gives that advice to anyone with a history of skin conditions, respiratory allergies, asthma or an earlier reaction to isocyanates, the reactive chemicals in spray foam. We'll go through that information with you and talk about other options for the same spaces.
What license does an insulation contractor need to work in Castle Rock?
Before applying for a building permit, a contractor needs a current registration with the Town and a valid license from a jurisdiction that tests to the national ICC building-code exam or its equal. They also need liability insurance, plus workers compensation insurance if it applies. Ask any contractor you're considering whether they meet all of that before you sign.
What is the best way to prepare basement walls for spray foam?
Inspect the walls first and fix any water coming in, plus any moisture problems in the basement, the crawl space or along the foundation, because building guidance makes that the first step for foaming existing foundation walls. If we find water at the estimate, I'll show you what I'm seeing, and the spraying waits until it's fixed.
Will spray foam make my house too airtight?
It can if a lot of the house gets foamed. Spray foam industry guidance notes that foam can seal a home tighter than the minimum fresh-air rates building codes or design recommendations call for. It suggests asking a design professional whether you need permanent mechanical ventilation, a fan system that brings in outside air. If your plan goes well beyond the rim joists, I'll bring that up at the estimate.
Related insulation work
- Open-cell foam insulation
A softer, lighter foam that suits rooflines and walls with room for a thicker layer and no moisture worries.
- Commercial insulation
For offices, warehouses and metal buildings that need insulation done to commercial standards.