Insulation contractor in Rohnert Park, CA - attics sealed before they're filled
D&R Santa Rosa Spray Foam Insulation is an insulation contractor working in Rohnert Park, CA. We seal attic gaps, top up or replace insulation, and insulate crawl spaces, walls and the room over the garage for homes and businesses.
- Licensed and insured.
- Free on-site estimates.
- We respond within 1 business day.
Houses and commercial buildings across Rohnert Park
We're an insulation contractor based in Santa Rosa, and Rohnert Park is a short drive south, so we work here the same way we do next door in Cotati or farther north in Healdsburg. The calls are much the same across these cities: drafty rooms, a hot upstairs, cold floors, a high power bill and the odd office or shop a property manager wants looked at.
A lot of Rohnert Park is neighborhoods of houses built around the same time, so we often see the same attic layout from one house to the next. The price turns on what's in yours now: how many inches are left, whether old material has to come out first and how many gaps need sealing. The schedule turns on the same things, plus a permit and inspection when the job needs one, and you'll get your own figure from the estimate. Similar houses still age differently, so I look at each attic myself before I put a number on it.
Our services in Rohnert Park, CA
- Attic insulation
Many Rohnert Park attics we open have only a few settled inches left, so upstairs runs hot. We measure what's there and top it up with blown-in fill.
- Air sealing services
Drafty rooms here usually trace to gaps around can lights, pipes and the attic hatch. Our air sealing services close those gaps first, so new insulation isn't fighting a draft.
- Insulation removal
Some attics here hold insulation that's soaked, flattened or full of droppings, and laying more on top keeps the problem. We bag it out and start clean.
- Crawl space insulation
Cold floors in crawl space houses here usually mean the insulation underneath has sagged or fallen. We check for moisture first, then insulate between the floor joists.
- Spray foam insulation
In two-story homes here, the room over the garage is often the hottest and coldest in the house. Spray foam fills that tight framing and seals air as it insulates.
- Commercial insulation
Property managers here call us about offices and shops with hot and cold spots. We look over the roof, walls and ducts first, then insulate in order.
What Rohnert Park houses need above and below
Rohnert Park is built on highly expansive soil, ground that swells when it's wet and shrinks as it dries, and that movement can damage foundations and concrete slabs. That's true of the city as a whole rather than a reading of your lot, but it's why the city points to gutters, downspouts and splash blocks that carry rain away from the house. Under a house here, I check for water near the foundation and for cracks or gaps where things have moved before any insulation goes in, because insulation against damp wood or over an open gap only hides the problem.
Up top, a hot upstairs or a stuffy room over the garage usually means the attic is leaking air and short on insulation. We close those leaks before adding anything, keep the eave vents clear so the attic can still breathe, and carry the insulation full depth out to the edges, where it's usually thinnest.
Get a free insulation estimate at your Rohnert Park home
Call (707) 508-4085 or send the form, and we'll reply within one business day to set a time to come out. I look at your Rohnert Park home myself, attic and crawl space included, and the estimate is free with no obligation. If you go ahead, our install crew does the work with me running it on site.
Insulation work up close
Rohnert Park insulation questions answered
Do I need a permit for insulation work in Rohnert Park?
It may, since the city's Building Division requires a building permit when a building is altered, repaired or improved, apart from some exceptions it lists. The division is the office to ask about your job. When a job needs a permit, we apply for it, set up the inspections and give you a copy of the paperwork for your records.
Does an insulation contractor need a license to work in Rohnert Park?
Yes, for most jobs a contractor needs both a state contractor's license and a city business certificate. The state contractors board requires a current license from anyone who contracts for work on a project that needs a building permit, uses employees, or takes on work worth $1,000 or more in labor and materials combined. Rohnert Park also requires a Business Tax Certificate from any business working inside city limits, including crews that come in from other cities, so ask whoever you hire about both. We're licensed and insured.
How much does attic insulation cost in Rohnert Park?
There's no flat price, because what you pay is set by what we find in your attic. Old insulation that has to be bagged out, a lot of sealing, a tight attic or a switch to spray foam each raise it, and a clean attic that just needs a top-up keeps it lower. I'll explain what each part of the price is for, so you know what you're paying for before you decide.
How long does attic insulation take, and when can we go back in the house?
A top-up of loose fill is the quick end of the job, and removal, a lot of sealing or spray foam each add time, so I'll tell you what to expect for your house before we start. With blown-in work most people stay home, but spray foam has a re-entry time, a wait before people and pets come back inside, set by the foam's maker, and we'll tell you when that is. If the job needs a permit, the city reviews applications in the order they come in, so that can set the start date too.
Should I use spray foam or blown-in insulation in my Rohnert Park attic?
For most attics here, sealing the gaps and topping up blown-in insulation is the better value, and I'd only steer you to spray foam if your ductwork runs through the attic. Foam costs more, but it seals air while it insulates, which matters when the ducts are up there with it. Closed-cell foam, a dense foam that also blocks moisture, earns its keep in tight spots like the room over the garage.
What is the best way to insulate a crawl space in Rohnert Park?
Deal with the water first, then insulate the floor above it. With the soil here moving as it wets and dries, we look for damp dirt and standing water, and when the ground stays damp we lay a vapor barrier, a heavy plastic sheet over the dirt, before insulating between the floor joists. A downspout emptying against the foundation is often part of that conversation.