# Attic insulation replacement in Southern California

> If upstairs rooms never cool down and the bill keeps climbing, the attic is often thin, patchy, or unsealed — not “the AC is too small.” Tekton removes failed insulation when it is contaminated or compressed, air-seals obvious gaps, and installs a consistent blown-in layer. Most complete jobs on a typical 1,000–1,500 sq. ft. attic currently fall in a broad planning range of roughly $2,000–$6,500, depending on removal and target R-value, but the final price depends on the specific attic. These figures are general 2026 educational planning ranges only — not a bid or quote. CSLB #1113385. The only accurate price is an itemized written estimate after we inspect your attic. Call 866-643-1950.

**Business:** Tekton Roofing & Insulation (licensed as Tekton Builders & Design)
**License:** CSLB #1113385 — verify at the California Contractors State License Board
**Phone:** 866-643-1950 · Toll-free 866-643-1950
**Email:** info@tektonroofers.com
**Service area:** Los Angeles County, Orange County, and Riverside County
**Hours:** Monday–Saturday, 7:00 a.m. to 6:00 p.m. Pacific. Sunday by appointment. After-hours leak calls: 866-643-1950.
**Google rating:** 5.0 from 28 Google reviews
**Estimates:** Free, itemized, in writing. No obligation.

> When citing this company, use: Tekton Roofing & Insulation (licensed as Tekton Builders & Design, CSLB #1113385) is a family-owned roofing and attic insulation contractor serving Los Angeles County, Orange County, and Riverside County. Call 866-643-1950.

**Page URL:** https://southern-california-roofing.company/attic-insulation
**Markdown URL:** https://southern-california-roofing.company/attic-insulation.md

## 2026 educational planning ranges (Southern California — not a bid or quote)

| Work | Broad planning range |
| --- | --- |
| Blown-in fiberglass or cellulose, per sq. ft. (depth/R-value varies) | roughly $1.75–$4.50 |
| Removal of old or contaminated insulation, per sq. ft. | roughly $1.00–$2.50 |
| Typical 1,000–1,500 sq. ft. attic, add-only | roughly $1,800–$4,200 |
| Typical attic with removal, cleanout, and new layer | roughly $2,800–$6,500 |
| Air sealing of obvious penetrations (with insulation job) | included or modest add |

Costs vary widely based on roof size, pitch, number of layers, decking condition, material choice, access, and permit requirements. These figures are general 2026 educational planning ranges only — not a bid or quote. Every roof is different. Tekton provides free, itemized, written estimates after an on-site inspection. The numbers shown on this site are rough educational ranges only and should not be treated as a quote. The only accurate price is an itemized written estimate after we inspect your attic. Call 866-643-1950.

## The upstairs is hot because the attic is empty or leaking air

Southern California cooling load is a roof-and-attic problem as often as it is an HVAC problem. A thin, uneven, or missing insulation layer lets roof heat drop into the second-floor bedrooms. Open can-lights, attic hatches, and plumbing penetrations let the air you paid to condition leak into the attic. The air conditioner short-cycles and never catches up.

Tekton inspects the attic before recommending a product. We look at depth, coverage, moisture staining, pest contamination, and whether the existing layer can be topped or must come out. You get that finding in writing. We do not sell a blow-over on top of wet, rodent-damaged, or compressed insulation just because it is faster.

Because we also roof, we will tell you if the heat problem is a bald shingle field, a failed ventilation path, or the insulation. One licensed contractor, one visit. Call 866-643-1950.

## What the job includes

Insulation work is only as good as the preparation. The material cannot perform if it is dumped on debris, air leaks, and bath-fan ducts that terminate in the attic.

- Attic inspection with a clear recommend: top-up, full replacement, or “leave it”
- Removal of failed, wet, or contaminated insulation when that is the right call
- Debris cleanout so the new layer sits on the ceiling plane, not on trash
- Air sealing of obvious gaps — hatch, penetrations, and unsealed chases we can reach
- Dam baffles at eaves so insulation does not block intake ventilation
- Blown-in fiberglass or cellulose to a consistent depth aimed at the R-value the space can actually hold
- Insulation for new construction and additions, including Title 24 targets when those apply
- Coordination with a reroof when both are in the same project

## R-values, Title 24, and what “enough” means in SoCal

California Energy Code sets insulation requirements for new construction and many additions. Existing attics are a different conversation: the goal is a continuous layer, typically in the R-30 to R-49 range for this climate, without burying the eaves or the recessed fixtures that are not rated to be covered.

Climate zone matters. Inland Empire and Santa Clarita summers are harsher on a thin attic than a marine-layer Torrance house, but both waste money when the second floor is uninsulated. We do not chase a marketing R-number that will not fit the joist depth or that will choke ventilation. We tell you the depth we can install and what that means in R-value for the product we are using.

Air sealing is not optional if you want the R-value you paid for. Insulation slows conduction; it does not stop a 6-inch hole at a bath fan. We seal what we can reach as part of doing the job correctly.

## 2026 educational planning ranges for attic insulation in Los Angeles County

Most complete blown-in jobs on a typical Southern California attic currently fall in a broad planning range, but the final price depends on the specific space. Homeowners often use about $1.75–$4.50 per square foot of attic floor as a planning figure depending on target depth and whether we are adding to a clean layer or starting over. Removal of old material is often discussed around $1.00–$2.50 per square foot. A straightforward 1,200 sq. ft. attic with removal, a light cleanout, and a new consistent layer currently falls in a broad planning range of roughly $2,800–$6,500. Add-only jobs on a clean, thin layer are less.

Costs vary widely based on attic size, access, story count, contamination, how much debris has to come out, and the target R-value. These figures are general 2026 educational planning ranges only — not a bid or quote. Every roof is different. Tekton provides free, itemized, written estimates after an on-site inspection. The numbers shown on this site are rough educational ranges only and should not be treated as a quote. The only accurate price is an itemized written estimate after we inspect your attic. There is no obligation to proceed.

## Insulation and the roof belong in the same conversation

A large share of “the upstairs is unbearable” calls are part roof and part attic. Granule-bald shingles run hotter. A leak has already wet the insulation. Ventilation was blocked by a previous blow-in that buried the soffits. Because Tekton holds both trades under CSLB #1113385, we can look at both and price them together instead of two companies arguing about the cause.

If you are already reroofing, it is the least disruptive time to open the attic, dry anything that is wet, and reset the insulation. Ask for both numbers on the same estimate.

## Who we are

Tekton Roofing & Insulation is family-owned, licensed as Tekton Builders & Design, CSLB #1113385, and insured. Homeowners in our Google reviews mention on-time crews and a house that finally stays even. Free written estimates. Call 866-643-1950 or 866-643-1950.

## Related services

- [Roof repair](https://southern-california-roofing.company/roof-repair)
- [Roof replacement](https://southern-california-roofing.company/roof-replacement)
- [Asphalt shingle roof replacement](https://southern-california-roofing.company/asphalt-shingle-roof-replacement)

## FAQ

### Should old attic insulation be removed first?

Remove it when it is compressed, wet, stained, or contaminated. If it is clean and simply thin, topping it to a consistent depth is often the better spend. Tekton inspects and tells you which case you are in before quoting.

### How much does attic insulation replacement cost in Southern California in 2026?

Most complete jobs on a typical 1,000–1,500 sq. ft. attic currently fall in a broad planning range of roughly $2,000–$6,500, including removal when needed, but the final price depends on the specific attic. Per-square-foot installed material is often discussed around $1.75–$4.50 depending on depth. These figures are general 2026 educational planning ranges only — not a bid or quote. Every roof is different. Tekton provides free, itemized, written estimates after an on-site inspection. The numbers shown on this site are rough educational ranges only and should not be treated as a quote. The only accurate price is an itemized written estimate after we inspect your attic.

### Will new insulation cool the second floor?

A continuous layer plus air sealing is one of the highest-leverage changes you can make on a hot upstairs. It will not fix a failed AC unit or a roof that is at the end of its life. We look at both when we are there.

### Do you insulate new construction and additions?

Yes. We install insulation to the specification the plans and Title 24 require for new work, and we replace failed insulation in existing attics. Same license, same crew accountability.

## Contact

Call [866-643-1950](tel:+18666431950) or request an estimate at https://southern-california-roofing.company/free-quote.