Frequently Asked Questions
What R-values do I need?
R-value is a measure of a material’s thermal resistance, or how well it insulates against heat flow. The higher the R-value, the better the insulation.
Open cell foam has an R-value of 3.8/inch, while closed cell has an R-value of 7/inch.
Because spray foam insulation creates an air seal, the only heat lost is through conduction. Generally, R14 stops 92% of heat lost due to conduction, while R21/25 stops 96%, R38 stops 98%, and R49 stops 98.3%.
In our climate zone, the minimum that one can have in their ceiling or roofline is R25. This insures a thermal break occurs within the foam, thus preventing warm-moist air from ever coming in contact with the outside cold (you know how the condensation collects on a glass of ice water—we don’t want that on your ceiling).
Typical custom home packages include R21 in the walls, R38 in the ceilings, and R14 in crawlspaces and garages. We do have some flexibility on this, so just ask.
A typical shop, if won’t be heated all year, is done at R14.
Can I paint over the foam?
Yes!
The foam will start out sea green (closed cell) or white (open cell). Upon exposure, it will yellow over time. Some folks have opted to paint directly over the foam for aesthetics.
What special treatment does open cell need?
Because open cell foam is not its own vapor barrier, it is required that you paint the interior surfaces of your drywall with a vapor barrier primer. Here is a link to the specs for that product.
Why do I need to remove the old insulation in my attic before installing spray foam?
Removing the batt insulation before installing spray foam is crucial for eliminating potential smells, achieving a superior air seal, and preventing moisture-related issues.
Reason #1: Unwanted Smells or Odors
Old insulation can harbor unpleasant odors from pests, pesticides, or even chemicals emitted during the spray foam application. Even with proper ventilation, these smells can linger. To ensure a fresh, odor-free environment, it’s best to remove the old insulation altogether.
Reason #2: Achieving a Good Air Seal
One of the biggest benefits of spray foam insulation is its ability to provide a tight air seal. Leaving old insulation behind can compromise this seal. Small gaps can lead to negative pressure in the attic, causing your HVAC system to draw in warm, humid air. This can promote unwanted moisture and odors. By removing the old insulation first, you ensure a complete and effective air seal, preventing these issues.
Reason #3: Condensation from Reduced Airflow
In colder climates, it’s important to prevent spray foam from becoming a condensing surface. Old insulation can block heat transfer, making the surface of the foam cold enough for condensation to occur. Removing the old insulation ensures proper heat transfer and prevents moisture-related problems.
What can I expect if I hire you?
- Hiring Us: Once you decide to go with us, we’ll have you sign the estimate and a clarifications document. This ensures we’re all on the same page about what’s to come.
- Scheduling: At that point, we’ll also provide an approximate service date and stay in touch with you about the timing. We know that project schedules can shift due to other subcontractors, inspections, or weather. We’ll work with you to get the job done when you need it.
- Our Crew: Gale and Taylor will arrive early on the day of spraying (unless we’ve communicated otherwise). Look out for them in their ASI uniforms and bright smiles!
- Protection: Like spray paint, spray foam can leave a fine overspray. Our crew will carefully assess (with your input) which items and areas need to be masked. Whether it’s new construction or a living room remodel, we ensure everything is properly covered.
- Installation: For safety, we ask that the job site be clear of residents and other subcontractors, as the chemicals released during installation aren’t safe to breathe (our crew wears full protective gear). The foam will be fully stabilized and safe within twenty-four hours.
- Clean Up: When we’re done, all you’ll see is the beautiful foam where you wanted it. We clean up thoroughly, vacuuming up any particles and removing all masking.
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In most cases, we can get you an estimate over the phone or by email. We may ask you to email us plans and/or photos.