Merced Spray Foam Insulation
We install open-cell and closed-cell spray foam in homes, rentals, shops and metal buildings across Merced and Merced County. Most calls start the same way. The house won't cool down in July, the back bedrooms are the worst, and the AC is still running at 10 p.m.
In most Merced homes, the problem is overhead. Your ductwork runs through an attic that bakes all afternoon, and attic spray foam is usually the most direct fix. We inspect first, recommend what the building actually needs, and give you a written price before any work begins.
Built for Merced Summers
July in Merced averages a 96°F high, and the summer of 2024 set an all-time mark when the city hit 111°F. Insulation advice written for cold climates misses the real problem here, which is keeping heat out and protecting the ductwork above your ceiling. Spray foam does both. It insulates the roof and walls, and it seals the gaps that let hot, dusty air into the house. Rooms cool faster and stay cool longer.
The Problem
Most single-family homes in Merced have the air handler and ducts in a vented attic. On a 100°F afternoon, that attic can pass 130°F. Your AC cools the air, then pushes it through ducts sitting in that heat. Every leaky joint pulls attic air into the system. By the time the air reaches the far bedrooms, much of the cooling is gone.
Thin or settled insulation on the attic floor makes it worse. So do unsealed recessed lights, bath fans and plumbing penetrations. In winter, the same gaps let warm air escape on cold tule fog mornings. Warm ceilings, dust along the baseboards and big temperature swings between rooms all mean air is moving where it shouldn't.
Our Services
Three services cover nearly every home, rental, shop and commercial building we see in Merced County.
If your ducts are in the attic, we spray the underside of the roof deck. That keeps the attic close to indoor temperature, so your AC stops losing cooling before it reaches the rooms. For attics without ductwork, we seal the ceiling and add insulation to the attic floor.
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Steel shops, ag buildings and warehouses turn into ovens in summer and drip condensation on foggy winter mornings. Closed-cell foam sprayed directly onto the panels cuts the heat, seals the seams and stops the dripping.
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Closed-cell foam delivers the most R-value per inch and resists moisture. We use it in exterior walls, additions, garage conversions, crawl spaces and anywhere space is tight.
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We don't quote spray foam over the phone, because two attics on the same street can need very different work. Your price comes down to four things. Once we've seen the space, you get a written estimate that shows each one.
Closed-cell costs more per inch but delivers about twice the R-value of open-cell.
Roof-deck jobs are measured along the roof slope, not the floor.
A higher target R-value means more inches of foam.
Old insulation, rodent damage or debris has to come out first.
Price Ranges
Example jobs we see around Merced, priced at current Central Valley installed rates. Use these to budget, then get a written estimate for your building.
| Job | Foam & Thickness | Example Area | Estimated Installed Cost |
|---|---|---|---|
| Attic roof deck (single-story home) | Open-cell, 5.5" | 1,500 sq ft | $4,950–$8,250 |
| Interior or exterior walls (2x4) | Open-cell, 3.5" | 1,000 sq ft | $2,100–$3,500 |
| Garage conversion or addition walls | Closed-cell, 3" | 500 sq ft | $1,725–$2,700 |
| Crawl space rim joists | Closed-cell, 2" | 200 sq ft | $460–$720* |
| Metal shop, roof only (condensation control) | Closed-cell, 1" | 2,500 sq ft | $2,875–$4,500 |
| 40×60 metal shop, walls + roof | Closed-cell, 2" | ~5,300 sq ft | $12,190–$19,080 |
Based on installed rates of $0.60–$1.00 per board foot for open-cell foam and $1.15–$1.80 for closed-cell foam. One board foot is 1 square foot of foam, 1 inch thick.
* Most contractors have a minimum job charge, so small jobs often cost more than the math suggests.
These are budgeting examples, not quotes. Your price depends on prep work, access, required coatings and the R-value your project needs. Request a free estimate for an exact number.
Why Us
You'll know exactly what you're paying for. Every estimate lists the areas we'll spray, the foam type, the thickness and the price. If your building doesn't need spray foam, or another option would cost less for the same result, we'll tell you.
On the day of the job, we cover your floors and belongings, ventilate the work area and follow the manufacturer's application and re-entry guidelines. When we finish, we check the thickness, clean up and walk you through the work. For additions and new construction, we plan around California's Title 24 energy requirements.
What We Insulate
The spaces we insulate most often across Merced and the surrounding farm country.
Call Merced Spray Foam Insulation or request a free estimate. We'll inspect your attic and tell you what it will take to fix it.
How It Works
Four steps, with no surprises along the way.
We check your existing insulation, duct location, ventilation, and any signs of moisture or pest damage.
You get a written plan with the areas, foam type, thickness and price. Take your time deciding.
We protect your home, ventilate the space and spray in even passes to the specified depth.
We measure the finished thickness, clean up and walk you through the job before we leave.
About Us
Merced sits on Highway 99, where Highway 140 heads east toward Yosemite, and the city has long called itself the Gateway to Yosemite. It's the county seat, a college town since UC Merced opened in 2005, and the center of a big farming region. Our customers reflect all of that. We insulate family homes, student rentals, dairy and orchard shops, and backyard steel garages.
Rentals deserve a mention. About half of the homes in Merced are renter-occupied, and a hot rental means tenant complaints, AC service calls and turnover. Landlords call us to fix the attic once instead of answering the same complaint every July. Learn more about us.
Areas We Serve
We work throughout Merced, from the older neighborhoods near downtown to the north side near UC Merced, and on farms and rural properties across Merced County.
FAQs
Straight answers to the questions we hear most.
It depends on the foam type, the square footage, the thickness needed and how much prep work is involved. The price table above shows typical ranges for common jobs. For your exact number, we do a short inspection and give you a written estimate that breaks out each item.
For homes with ductwork in the attic, it's usually the most effective upgrade available. Foam on the roof deck keeps your ducts out of 130°F attic air, so cooled air arrives cool. If your attic has no ductwork, sealing the ceiling and adding floor insulation may be the better value, and we'll tell you which applies.
Open-cell is the right choice for most attic roof decks and interior walls. It costs less per inch and seals air leaks well. Closed-cell delivers about twice the R-value per inch and resists moisture, which makes it the better fit for metal buildings, crawl spaces and shallow walls. Many jobs use both.
For rentals with ducts in the attic, sealing the attic usually cuts summer comfort complaints and the AC service calls that come with them. It's a one-time fix that doesn't depend on tenant habits. We can schedule around move-outs or work with your tenants on timing.
It depends on the product and the manufacturer's guidelines. We'll give you the exact timeline before work begins and let you know when it's safe to return.
Get Started
Call (209) 646-6843 or fill out the quote form. Tell us what kind of building it is, which area you want insulated and what's bothering you about it. We'll schedule an inspection and give you a written estimate after the visit.