Bigger or unusual job? Compare bids from local pros and you pick who does the work.
The service
What weatherization & air sealing package is, what a visit covers and where the line is.
The short answer
A weatherization and air sealing package finds and closes the gaps that let conditioned air escape and outdoor air in. Weatherization & Air Sealing Package in Los Altos is booked through pros who cover its 2 ZIP codes, in neighborhoods such as Old Los Altos, Downtown Los Altos Village, and Country Club. In Los Altos, the dry season from late spring to fall is the easiest time for outside work, and the fall calendar fills before the first big rain. On NorTech, each pro sets a price and warranty for the sealing work, and you choose the pro.
What a weatherization & air sealing package visit includes
What is included depends on the jobs you pick and on how each pro sets up their visit and timing. You see the exact scope with each pro's price before you book.
- Blower door test or visual air leakage survey
- Sealing of attic penetrations, top plates and chases
- Weatherstripping of doors and windows
- Rim joist and crawlspace sealing
- Duct sealing at accessible joints
- Before-and-after report and savings estimate
Pick what is on your list
Tick what you want done, or add your own. Your list goes under the booking card and to the pro you choose, and you can describe anything else when you book.
Testing and survey
Tick what you want done. One visit can cover several.
Tick jobs above, or add your own. Your list goes under the booking card and to the pro you choose, so they see exactly what you need before they arrive.
What shapes a weatherization & air sealing package job
These are the things that make one job different from another. Mention them in your notes so each pro can scope your job properly.
Choosing air sealing methods
Different leaks need different materials, and your pro will often use several. Tap an option to compare, then add your pick to your job notes.
What the package leaves you with
A good weatherization visit produces proof of what was found and sealed. Each pro sets what they provide.
- A starting leakage reading from a blower door test or a written survey
- Photos of the sealed areas in the attic, rim joist and around doors
- A repeat reading after the work, when a test is included
- A list of the spots that could not be reached or need another trade
- Recommended next steps, such as insulation, ventilation or duct work
What is not part of weatherization & air sealing package
Knowing where the line is keeps the visit on track and keeps you safe. When a job belongs to a specialist, NorTech tells you before you book.
- Any job where labor and materials together reach $1,000 or more is done by a licensed contractor. A large package or one that adds insulation or HVAC work may reach that, and then the licensed trade takes over.
- Installing or replacing attic or wall insulation. That is a separate insulation service.
- Replacing windows, doors or ductwork, and HVAC repair or replacement.
- Mold remediation, rot repair and moisture correction found in crawlspaces or attics.
- Electrical work at recessed lights or wiring, which is licensed electrician work.
- Guarantees of lower bills or a specific leakage reading.
Plan your visit
How booking works, how to get ready, and what to expect where you live.
How booking weatherization & air sealing package works
Say what needs doing
Add your ZIP and a few words about the job.
Compare pros near you
Each pro sets their own price and warranty. NorTech does not pick for you.
Book the pro you pick
Add photos and details on their page. Your card is held and only charged after the work and the photos.
Photos and a warranty
Your pro backs the work with a workmanship warranty — if covered work is not right, your pro makes it right, free.
Before you book weatherization & air sealing package
Quick things that save a trip. Tick them off as you go; none of it is required to book.
Map your drafts before the visit
On a windy day, note rooms with cold spots, drafts at outlets and doors and floors that feel cold. Those notes help the pro start where it matters.
Clear access to attic and crawlspace
Move stored items away from the attic hatch, the rim joist and the crawlspace door. Clear access shortens the visit and lets the pro seal what they find.
Tell the pro about fuel appliances
Gas furnaces, water heaters, wood stoves and fireplaces need a safety check after sealing. Mention what you have so the test is planned.
Photograph problem areas
Pictures of frost, stains, gaps at doors or an old attic hatch show the pro what to prioritize before arriving.
Ask whether an audit comes first
Find out if a blower door test is included, and if a full energy audit is a separate step. An audit can set priorities for sealing, insulation and equipment.
Ask for a before and after reading
A pair of test numbers is the best proof the work did something. Ask the pro how the results will be shown, and what they will tell you if the number barely changes.
Say where in Los Altos you are
Add your neighborhood, for example Old Los Altos, Downtown Los Altos Village, and Country Club, or your ZIP code to your notes. Pros choose the neighborhoods they cover, and it tells them how far they have to travel.
How where you live changes weatherization & air sealing package
Best time to book weatherization & air sealing package
Leaks are easiest to feel on a cold or windy day, and attics are safer to work in outside midsummer heat. Sealing before the heating or cooling season means the work is done when systems run the most. In Los Altos, the dry season from late spring to fall is the easiest time for outside work, and the fall calendar fills before the first big rain.
Often booked together with weatherization & air sealing package
Book several services with one pro. Pros set their own bundle discounts.
An audit ranks the leaks and gaps in your house, so sealing starts where it matters.
Sealing first then adding insulation lets the insulation work as intended.
Exterior caulk and weatherproofing close gaps that sealing from inside does not reach.
Leaky ducts waste conditioned air, and fixing larger problems goes beyond accessible joint sealing.
Around Los Altos
Where in Los Altos the work happens, and the cities close by.
Weatherization & Air Sealing Package across Los Altos
Pick your neighborhood to see what homes there tend to need. Pros choose the neighborhoods they cover, so enter your ZIP code to see who covers yours.
Cities near Los Altos
Pros often cover more than one city. The rings show 5 and 10 miles from the center of town.
Other services in Los Altos
Each one has its own page for this city.
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See pros in Los AltosTrust and answers
What backs the work, who is licensed and insured, what customers say, and your questions.
Backed by your provider’s warranty. If covered work fails, your provider makes it right, free.
Los Altos homeowners
Weatherization & Air Sealing Package reviews in Los Altos
Verified weatherization & air sealing package reviews from Los Altos homeowners will appear here.
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Your pro backs the work with a workmanship warranty — if covered work is not right, your pro makes it right, free. Book with confidence and tell Los Altos how your pro did.
Book Weatherization & Air Sealing Package in Los AltosFrequently asked