Spray Foam Insulation in Kenmore, WA
Mid-Century Homes With Original Crawl Spaces
Kenmore has the oldest concentration of housing stock among the cities we serve, which makes it the most consistently rewarding place to do this work. The bulk of the city is 1950s to 1970s single-family: original crawl spaces, original attic voids, and insulation specified to a code that predates any serious thinking about air sealing. Homes of that vintage were built with attic depth now considered nominal and crawl spaces with nothing under the floor beyond what a later owner stapled up. The Lake Washington shoreline and the low ground along the Burke-Gilman Trail corridor keep moisture in the picture, particularly on the streets closer to the water in Sheridan Beach and Inglewood, which pushes crawl space specification firmly toward closed-cell. Finn Hill on the western side is the exception, with newer construction on larger lots and a different problem list. Permits run through the City of Kenmore Community Development Department and water is Northshore Utility District.
Lakeside Streets and the Shoreline Moisture Picture
The practical consequence of this city's housing age is that the rebate conditions land favorably here more often than anywhere else we work. Puget Sound Energy weatherization rebates for insulation are aimed at older site-built homes with thin existing insulation, and a mid-century house with original material still in the attic is close to the profile the program was written around. Saint Edward State Park on the western edge and the Kenmore Air Harbor seaplane base at the south end bracket a city that has changed a great deal around its housing without changing the housing very much. That is exactly why the assemblies under these floors and above these ceilings are so consistently worth doing, and why the improvement tends to be larger than homeowners expect going in.
Crawl Space Encapsulation in Inglewood and Sheridan Beach
Crawl spaces under the mid-century housing here are the most common job we take in this city, and they are frequently in worse condition than the homeowner expects. Sixty and seventy year old floor assemblies sitting over damp ground, with batts added at some point in the intervening decades and now sagging, compressed or gone entirely. Closed-cell adhered to the subfloor, the joists and the rim joist is the specification, and on the streets nearer the Lake Washington shoreline in Sheridan Beach it is not a close call. The Burke-Gilman Trail corridor runs through low ground that stays wet, and the houses along it show it first. We deal with the ground vapor barrier before any foam goes up. Sixty-year-old ground vapor barriers are usually torn, displaced or absent entirely. Replacing one is cheap alongside a foam job and expensive as a separate visit later.
Attic Foam Where Original Depth Was Never Adequate
Attic work here usually starts with removal. Original material in a 1950s or 1960s attic void is often compressed, unevenly distributed or affected by decades of intermittent rodent activity, and building over that seals the problem in rather than solving it. Once it is out and the ceiling plane is properly sealed, the real question becomes whether the attic warrants foam at all or whether blown-in reaches the same depth for less money. Around Central Kenmore and Inglewood, where the ceiling planes leak badly at the hatches and old can lights, foam usually earns its cost. Where the plane is already reasonably tight, we will say so and point you at the cheaper product. We document the finished depth and coverage on every attic we complete, so the assembly you paid for is one you can actually verify afterwards rather than take on trust.
Newer Construction on the Finn Hill Side
The Finn Hill side is a different job altogether. Newer construction on larger lots generally has adequate depth in the attic already, so the work there concerns the penetrations and the assemblies nobody thought about at framing — bonus rooms over garages, cantilevered floor sections that overhang cold air, and the attic hatch itself. That work is smaller in scope than a full retrofit and often more noticeable in comfort terms, because it targets the specific room that never holds temperature. Puget Sound Energy serves the whole city, so both the mid-century retrofits and the newer-home sealing work sit in rebate territory subject to the conditions on home age and existing depth. Cantilevered floors over open air are the assembly homeowners here most often do not know they have, and they are frequently the reason one room runs colder than every other.
Spray foam specified for Climate Zone 4C, installed across Redmond and the east side of King County.
Proudly serving Redmond, Woodinville, Bothell, Kenmore, Duvall and Carnation for years.
Comprehensive Spray Foam Insulation Services in Redmond
Tailored to Your Needs
Spray foam comes as two products and a lot of assemblies. Closed-cell is dense, structural and its own vapor retarder, so it belongs in crawl spaces, on rim joists and against anything facing the ground. Open-cell is lighter and cheaper per inch, so it belongs in attic planes and interior walls. Choosing wrong is expensive to undo.
Closed-cell foam applied to the floor assembly and rim joist, sized for damp marine conditions.
Dense two-pound foam for crawl spaces, rim joists, basement walls and metal decks.
Open-cell foam at the attic plane or roof deck, sealed before depth.
Light half-pound foam that expands to fill cavities completely and quiets the house.
Foam into open stud bays during remodels, additions and re-siding work.
Closed-cell on metal decks and shell walls for Redmond flex, shop and office space.
Foam for garage walls and ceilings, workshops, gyms and conversions.
Closed-cell against foundation walls and rims, once the water problem is solved.
A licensed Redmond spray foam contractor who documents what was actually installed.
An assessment that tells you what your attic needs before anyone quotes a product.
Frequently Asked Questions
Spray Foam Insulation can be complex, and we’re here to provide answers to common questions. Here are some frequently asked questions from our clients.
Frequently Asked Questions about spray foam insulation Redmond WA
How much does spray foam insulation cost in Redmond, WA?
There is no single Redmond number, and anyone who quotes one over the phone is guessing. Cost follows the square footage of the assembly, the depth the assembly needs, whether it is closed-cell or open-cell, and how hard the space is to get a hose into — a four-foot crawl space with a tight hatch costs more to do than an open attic of the same area. Removing failed insulation first adds to it. We measure the assembly, specify the depth, and price from that.
Do you need a permit for spray foam insulation in Redmond, WA?
It depends on the scope. Insulation upgrades inside an existing home often go ahead without a building permit, while work that touches the building envelope as part of a larger project, or anything in a commercial building, usually needs one through the City of Redmond Development Services Center. Applications run through the Redmond ePermitting Service. If your address sits in the surrounding unincorporated areas rather than inside the city, the permit desk is a different one, so we confirm jurisdiction before we quote rather than after.
What R-value does spray foam insulation need in Redmond, WA?
Redmond sits in Climate Zone 4C under the Washington State Energy Code, which is the marine designation covering the Puget Sound region. The code sets ceiling and attic targets high — R-60 prescriptively, with an R-49 path when full-depth coverage carries over the wall top plate at the eaves — and sets separate figures for walls, floors over crawl spaces and basement walls. Existing homes are grandfathered to the code they were built under, so the practical question is not what you are required to hit but what depth actually pays for itself in your assembly. Closed-cell delivers more R-value per inch than open-cell, which matters when depth is limited.
Is spray foam insulation worth it in Western Washington?
It is worth it where air movement is the problem rather than raw temperature, which describes most of what goes wrong in a marine climate. Damp air moving through a vented crawl space and condensing on cold framing does not care how many inches of batt are stapled up there. Foam stops the air and insulates in the same pass. In an attic with adequate depth and no air leakage, blown-in is often the better value — so we will tell you when foam is not the answer.
What is the difference between closed cell and open cell spray foam?
Closed-cell is dense, rigid, adds structural stiffness, delivers more R-value per inch and acts as its own vapor retarder. Open-cell is light, flexible, cheaper per inch, expands much further and lets vapor through. In Climate Zone 4C that mostly sorts itself: closed-cell for crawl spaces, rim joists, basement walls and anything against the ground or the weather, open-cell for attic planes and interior walls where depth and sound control matter more than moisture resistance.
Are there rebates for spray foam insulation in Redmond?
Puget Sound Energy runs weatherization rebates covering attic, floor and wall insulation, and most of Redmond is a PSE customer. The qualifying conditions are specific: the work has to be done by a PSE Trade Ally contractor, the home has to be a single-family property of four units or fewer heated primarily by PSE electricity or gas, site-built homes generally need to have been permitted before 1990, and existing insulation in the area being upgraded has to be thin. Energy Smart Eastside, which Redmond participates in, is a separate program covering heat pump conversions rather than insulation. We tell you which of these your job qualifies for before the work starts, not after.
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What Our Satisfied Clients Have to Say About
We pride ourselves on delivering great results and experiences for each client. Hear directly from home and business owners who’ve trusted us with their Spray Foam Insulation needs.
Our Education Hill place had cold floors every winter and two companies told us to add more batts under the floor. These guys got in the crawl space, showed us the batts were sagging off the joists and soaking up damp, and specified closed-cell to the underside of the floor and the rim joist instead. Floors are warm now and the crawl space finally smells like nothing. They also filled out the PSE rebate paperwork for us, which I was not expecting.
Priya N.
We bought a 1970s house near Grass Lawn Park with an attic that had maybe four inches of old blown-in left. They open-celled the attic plane, documented the depth and the R-value they hit, and sealed the can lights and the attic hatch while they were up there. The upstairs bedrooms used to be ten degrees off the rest of the house. They are not anymore.
Marcus D.
We run a small shop in a Southeast Redmond flex building and the back bay was unusable in the cold. They spec'd closed-cell on the metal roof deck and the exterior walls, worked around our hours, and got the permit sorted through Development Services without us having to chase it. It is a completely different space now.
Hana S.
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