Attic Insulation in California

Licensed & insured Every company we put you through to holds current licensing and insurance.
Know what to ask You are told what actually decides the price, so you can judge a quote.
Someone local You are put through to a technician who works your area, not a call center three states away.
Calls answered 7 days Someone picks up seven days a week, weekends included.

Is it urgent?

Can wait

Never urgent, and worth doing properly rather than quickly. The one thing to get right is sequence: air sealing and any blocked soffit vents come before new insulation goes down, because burying those problems means paying to do the attic twice.

Two things override everything on this page. If anyone has symptoms of carbon monoxide exposure — headache, nausea or dizziness that improves outdoors — leave the building and call the gas utility or the fire service, not a duct company. And if you can smell burning while the dryer is running, unplug it and leave it.

Signs to look for

Upstairs rooms that run hot in summer however long the system runs
Insulation you can see the tops of the joists through, or that is visibly thin and flattened
A heating or cooling bill that does not match the size and age of the equipment
Uneven snow melt or, in California more usefully, a roof that radiates heat into the evening
Insulation that has been disturbed, tunneled through, or soiled by rodents

How the work is done

Measuring what is there and what the assembly can take, rather than adding a nominal depth on top
Air sealing the ceiling plane first — top plates, can lights, plumbing and wiring penetrations, the attic hatch — because insulation slows conduction and does nothing about air moving through it
Baffling the soffit vents so new material cannot block the intake path
Installing to a measured depth with depth markers left in place, so what was paid for is verifiable afterwards

In California specifically

California's Mediterranean on the coast, hot and dry inland climate and its housing stock — stucco ranch and bungalow, tile or composition roofs, slab in the south and raised crawlspace through the Bay Area and the north — decide what is worth doing first. California is also the one state where duct leakage is routinely tested: Title 24 requires a HERS-verified duct test on most furnace or air-conditioner changeouts, so a duct problem here often surfaces as a failed test rather than as a complaint.

Before the technician arrives

Four things worth doing — and the first one is usually the thing people get wrong.

Insist that air sealing happens before the insulation goes in, and that it is itemized separately. Insulation blown over unsealed penetrations is the most common way this job gets sold badly, and it is invisible once it is covered.
Ask for depth markers and a photograph of the finished depth. It is the only way to check you got the R-value you paid for.
Clear stored items out of the attic, and say if there is any knob-and-tube wiring — it changes what may legally be covered.
Deal with any roof leak first. Wet insulation does not insulate and does not dry out up there.

What the work looks like

Photographs of attic insulation being carried out, so you know what to expect on the day.

How it works

Three steps, and you decide at the end of them.

1
You call and describe the problem

Tell us what you have noticed and where — the room, the smell, the noise, how long it has been going on. Give us your ZIP code and we will match you to a licensed company covering your area. There is no form to fill in.
2
A local company takes it from there

They discuss the problem with you directly, arrange a time to inspect, and agree the work and the price with you before anything starts. That conversation is between you and them.
3
You decide whether to go ahead

You are under no obligation. If the quote or the approach is not what you wanted, you are free to say no and call someone else.

Attic Insulation — FAQs

Do I actually need Attic Insulation done?

Never urgent, and worth doing properly rather than quickly. The one thing to get right is sequence: air sealing and any blocked soffit vents come before new insulation goes down, because burying those problems means paying to do the attic twice.

What does Attic Insulation involve?

The attic is where the largest, cheapest gain in most California houses is, because heat moves up and out and a great deal of older housing here was insulated to a standard far below what the code now asks for.

What makes this different in California?

California's Mediterranean on the coast, hot and dry inland climate and its housing stock — stucco ranch and bungalow, tile or composition roofs, slab in the south and raised crawlspace through the Bay Area and the north — decide what is worth doing first. California is also the one state where duct leakage is routinely tested: Title 24 requires a HERS-verified duct test on most furnace or air-conditioner changeouts, so a duct problem here often surfaces as a failed test rather than as a complaint.

Are the companies licensed and insured?

Yes. We only pass calls to licensed, insured operators working in California, and you are welcome to ask to see a license number on arrival.

What does Attic Insulation cost?

It depends on the property, the size of the system and what the inspection finds, so we do not publish a price — a figure quoted on a web page is not one the attending company has agreed to. You get a price before any work starts.

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What happens when you call

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