Rebuilds, additions and ADUs
Rebuild & New Construction Insulation in Santa Rosa, CA
Installed to your plans, inspected before drywall.
- Free on-site estimates
- Itemized written quote: material, thickness or depth, and R-value per area
- Air leaks, wiring and moisture checked before anything gets covered
Insulating New Framing to Your Plans
Rebuild & New Construction Insulation is a large share of the work in Santa Rosa because of how many homes have been rebuilt. The Tubbs Fire destroyed about 2,700 homes in Santa Rosa, according to Los Angeles Times reporting cited by United Policyholders, and more than 1,200 of them were being rebuilt a year later. The 2020 Glass Fire took more homes in the hills east of town. Add new subdivisions, additions and backyard ADUs, and a lot of new framing in the area needs insulation.
Built to Title 24
New homes, additions and ADUs in California are designed to the California Energy Code, Title 24, Part 6. Santa Rosa is the representative city for the code's Climate Zone 2. Your plans and energy compliance documents list the insulation the design assumes for each wall, ceiling and floor. We read those, quote to them and install to them, so what goes in matches what the inspector expects to see.
Spray foam or not
New framing is the easiest time to use foam because every cavity is open. Closed-cell suits shallow vaulted ceilings and floors; open-cell suits deeper walls and rooflines. Batts and blown-in are also common in new work and cost less. If your energy design allows options, we quote more than one.
Wildfire-area rules
Homes in wildland-urban interface areas built since 2008 have to meet stricter fire-resistance standards, including mesh coverings on attic vents and double-paned windows, as reporting on the Coffey Park rebuild noted. Insulation has to work with those vent details, not block them.
Timing
Insulation goes in after the framing, electrical and plumbing rough inspections and before drywall. We schedule with your builder so the insulation inspection is not the thing holding up the job.
Costs and insurance
Rebuilding costs rose sharply after 2017. United Policyholders reported a survey finding two-thirds of North Bay residents who lost homes were underinsured, by an average of $317,000, and a local builders' group said code changes can raise costs by as much as 20% for homes originally built before the early 2000s. Insulation is a small share of a rebuild, but we itemize it clearly so it fits your budget and your insurer's paperwork.
What This Covers
New-construction insulation we install:
Fire rebuilds
Whole-house insulation for homes rebuilt after the 2017, 2019 and 2020 fires.
Additions
Walls, ceilings and floors for new rooms, matched to the energy design.
ADUs and garage conversions
Insulation for detached units and converted garages.
Vaulted ceilings
Closed-cell or open-cell foam where rafter depth is limited.
Air sealing package
Sealing at plates, penetrations and rim areas before insulation.
Sound insulation
Interior walls and floors insulated for privacy between rooms.
Published Costs for New-Construction Insulation
| Job | Range and source |
|---|---|
| Spray foam, new construction | $2.75 to $6.50 per sq ft (Fixr) |
| Open-cell / closed-cell, installed | $1.50 to $3.50 / $3.00 to $5.00 per sq ft (HomeGuide) |
| About 1,000 sq ft of foam | $1,500 to $5,000 (HomeGuide) |
| Whole house, spray foam | $8,000 to $20,000 (HomeGuide); $10,000 to $30,000 (Fixr) |
| Blown-in, per sq ft | $1.00 to $2.80 (HomeGuide); $1.65 to $3.80 (Fixr) |
| Fiberglass / cellulose | $1.65 to $2.60 / $1.75 to $3.80 per sq ft (Fixr) |
National ranges from HomeGuide (2025-2026) and Fixr (2025), not rebuild-specific. The materials your energy design calls for, the size of the house and the schedule set the real cost. Your written estimate is the price we charge.
How It Works
1. Plan review
We read the plans and energy compliance documents and note each assembly's insulation.
2. Site visit
We look at the framing and confirm depths, access and timing with your builder.
3. Written quote
Material and R-value per assembly, with any options the design allows.
4. Install after rough inspections
Sealing, then insulation, after framing, electrical and plumbing pass.
5. Ready for inspection
We leave it ready for the insulation inspection before drywall.
Rebuild & New Construction Insulation Questions
Can you work from my Title 24 documents?
Yes. We quote and install to the insulation your energy compliance documents list for each wall, ceiling and floor.
Is spray foam required for a rebuild?
No. Batts and blown-in are common. Foam helps where depth is limited or air sealing is a priority.
When should I call you?
Once framing is underway. We can quote from plans and confirm on site before the rough inspections.
Do you insulate ADUs?
Yes, both detached units and garage conversions.
Can you insulate an ADU in a backyard or a converted garage?
Yes. Detached ADUs and garage conversions are insulated to their own plans and energy documents, the same way as a full house. Garage conversions often need extra attention at the slab edge, the old garage door opening and the ceiling.
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Get a Rebuild & New Construction Insulation Estimate
Send us your plans and we will quote to them.