Insulation Installation to R-49 Code in King & Snohomish County

The cost depends on the area being insulated, the material, and whether old insulation needs to be removed first. Every home is different, so we provide a free on-site estimate with exact pricing before any work starts. For a quick ballpark, you can try our online insulation cost calculator. It takes less than a minute and does not require an email address.

Washington state energy code requires R-49 for attic insulation in our climate zone. Many older homes in King County and Snohomish County have R-19 or less, which puts them well below the current standard. During our free inspection, we measure your existing insulation depth and show you exactly where you stand relative to code.

Most attic insulation jobs take one day. A typical 1,200-square-foot attic with blown-in insulation can be completed in 4 to 6 hours. If we need to remove old insulation first, or if there is rodent contamination that requires cleanup, the job may take a second day.

Not always. If your existing insulation is clean and in decent shape, we can often blow new insulation right on top of it to reach R-49. But if there is rodent damage, mold, moisture problems, or the old material is heavily compressed and no longer effective, removal is the better option. We assess this during the inspection and give you an honest recommendation.

Blown-in insulation is loose fiberglass or cellulose installed with a blower machine. It fills gaps, irregular spaces, and works well in attics and enclosed wall cavities. Batt insulation comes in pre-cut rolls that fit between standard framing. Batts are commonly used in crawl space floor joists and open-wall framing. Both have their place, and we recommend the best fit based on your project.

Yes. Puget Sound Energy offers rebates for attic and wall insulation upgrades. Snohomish PUD has weatherization incentives for homes in their service area. Seattle City Light offers separate programs. There is also a federal tax credit of up to $1,200 per year for qualifying insulation improvements under the Inflation Reduction Act. We help you understand which programs apply and provide the documentation you need.

We install vapor barriers as part of crawl space insulation projects. In the Pacific Northwest, moisture control is just as important as insulation itself. A 6-mil or 12-mil polyethylene vapor barrier on the crawl space floor prevents ground moisture from reaching your insulation and floor joists. For attic insulation, a vapor barrier is generally not recommended in our climate zone.

Common signs include uneven temperatures between rooms, high energy bills, cold floors in winter, drafts near walls or ceilings, and ice dams forming on the roof. If your home was built before 2000, there is a good chance it is under-insulated by current code. Our free inspection measures your existing insulation depth and identifies any gaps or problem areas.

Yes, and it is often the most cost-effective approach. Many homes need both attic and crawl space work, and doing them together saves on setup time and equipment mobilization. We can also handle insulation removal, vapor barrier installation, and rodent proofing as part of the same project.

We serve King County and Snohomish County, including Kent, Auburn, Covington, Renton, Federal Way, Tukwila, SeaTac, Mountlake Terrace, Edmonds, Lynnwood, Shoreline, Bothell, Kirkland, Woodinville, and surrounding communities. If you are in the greater Puget Sound area, there is a good chance we cover your neighborhood.

Yes. Green Attic LLC is a licensed Washington State contractor (license number GREENAL785CS), fully bonded and insured. We carry general liability and workers compensation coverage on every job.

The easiest way is to schedule a free estimate through our website or call us directly. We will visit your home, inspect your current insulation, explain what we find, and give you a written estimate with clear pricing. There is no obligation and no pressure. You can also try our online insulation cost calculator for a quick ballpark before scheduling.