Open-cell foam insulation in Alhambra CA - an attic sealed against drafts and heat
A hot upstairs room or a drafty attic usually means air is slipping through, and open-cell foam seals those gaps while it insulates.
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Is open-cell spray foam the right fit for your attic?
Open-cell foam insulation is a soft spray foam that expands to fill the gaps in an attic or wall, so it stops drafts and slows heat in one pass. In Alhambra we most often put it under the roof deck of older houses where the ductwork runs through the attic. The spraying is usually the quick part, and the time your family spends away while it cures is what you plan around.
Most people call me about a hot upstairs room, a drafty room over the garage or a power bill that climbs every summer. The price turns on how much area we cover and how deep, how easy the space is to reach, whether old material that's soaked or full of droppings needs insulation removal first, and whether the foam needs a covering afterward. The schedule depends on those same things, plus your time away from the house and a permit if the city says one is needed. I'll give you your own figure once I've looked at the space.
How we install open-cell foam insulation
I start by going up and looking at what's there now, how many inches are already down, what shape they're in and where air is getting through around lights, pipes and the hatch. Open cell can be a sensible choice, and I weigh it against closed cell for the exact spot it's going, because a roof deck, a wall and a damp corner don't call for the same foam. If old material is wet or dirty, it comes out before anything new goes in, since foam over a problem only hides it. On spray day our crew covers floors and anything nearby, sprays in even passes so the edges get the same depth as the middle, trims the foam back where it needs to be and cleans up before we leave. If the foam will stay in view, we talk through a covering as part of the plan, not as an afterthought.
Foam in the attic does nothing about damp coming up from the ground, so if your crawl space smells musty or the soil under the house stays wet, a crawl space vapor barrier is the job that handles it. Property managers planning a reroof or remodel on a shop, office or rental building can read about our commercial insulation work, which follows the same order of sealing first and insulating second.
Permits and houses for open-cell foam insulation in Alhambra
The Alhambra Building Division requires permits for most residential construction work, including remodels and alterations, and the city is the one who decides whether your foam job falls under that. So I check with them before work begins, and when a permit is needed we pull it and keep you informed through the inspections. If you'd like to ask them yourself, the office takes calls at 626-570-5032.
Many houses here are older, with low attics, ducts running through them and thin or settled insulation, which is why the rooms upstairs and over the garage get so hot. We see the same attics on jobs in Monterey Park and San Gabriel, and since we're based in Alhambra and work in many cities around it, please ask if yours isn't listed.
Open-cell foam, sprayed and trimmed
Request your open-cell foam estimate
We reply to every request within one business day. I'll then set a time to come out, look at the space and give you a free estimate on site, with no obligation.
(626) 525-0036Open-cell foam questions from Alhambra homeowners
How much does open-cell spray foam cost in the Los Angeles area?
Open-cell spray foam in the Los Angeles area usually costs about $0.60 to $0.90 per board foot, which is one square foot of foam an inch thick. Where your job lands depends on the area, the depth, how hard the space is to reach and whether old insulation or a covering is part of it. Your own figure comes from the estimate at your house, and the work is backed by our satisfaction guarantee.
Is open-cell or closed-cell foam better for my attic?
Open-cell usually suits an attic roof deck, because it blocks air well at typical installed thickness, while closed-cell earns its place where moisture is the worry. Closed-cell foam is rigid and rates about R-6 per inch, a measure of how well it slows heat, against roughly R-3.6 for the softer open-cell, and it blocks moisture vapor where open-cell doesn't. You can read more on our closed-cell foam page.
How long do I need to stay out of my house after spray foam?
Plan to be out while the foam is sprayed and until it has cured and the house has been aired out and cleaned, as federal safety guidance advises. A federal consumer safety fact sheet says to stay out during and after the work for at least 24 hours, so arrange somewhere for the kids and pets for at least that long. I'll let you know when it's time to come back.
How do I get my house ready for a spray foam job?
Start by talking through the safety plan with us, which the same federal fact sheet recommends. Then clear the path to the work area and plan your time away. In some cases installers also close off the area with plastic sheeting and taped seams.
Does exposed spray foam in an Alhambra attic need to be covered?
It may, because the spray foam trade group says foam left in view without a thermal barrier such as drywall may need an added fire-protective covering or coating. That's why I ask on the first visit whether your foam will stay in view, and we plan the covering along with the rest of the job.
Does a spray foam contractor need a license in California?
Yes, for any job of real size. California lets unlicensed workers take only minor jobs up to $1,000, and only when no permit is needed and they hire no one, so a foam job over that amount or one needing a permit calls for a licensed contractor. Ask to see the license before anyone starts work.
Book your open-cell foam visit in Alhambra
Call A&S Alhambra Spray Foam Insulation at (626) 525-0036, seven days a week and into the evening, or send the form with the size of the space, where it sits in your house and when you'd like the work done.