Bigger or unusual job? Compare bids from local pros and you pick who does the work.
The service
What caulking & weatherproofing is, what a visit covers and where the line is.
The short answer
Caulking and weatherproofing means walking the outside of a house, cutting out cracked and failed sealant, and applying new caulk or sealant at windows, doors, trim joints, siding seams and pipe and wire penetrations. Caulking & Weatherproofing 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. The independent pro you choose sets the price and the warranty for this work.
What a caulking & weatherproofing 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.
- Full exterior walk
- Old caulk removal
- New silicone caulk
- Window & door seals
- Your pro’s own workmanship warranty
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.
Windows and doors
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 caulking & weatherproofing 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.
What is not part of caulking & weatherproofing
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.
- A weatherproofing job that reaches $1,000 in labor and materials goes to a licensed contractor, and NorTech flags this before you book.
- Replacing windows, doors, flashing or siding that has failed is a separate service, not part of a caulking visit.
- Roof leaks, chimney repairs and gutter problems are separate services on NorTech.
- Insulation, air-sealing in the attic or crawl space, and whole-house air leakage testing are separate services.
- Removing paint or caulk containing lead or asbestos in older homes without telling your pro first. The pro needs to know the age of the home before starting.
Is my job a caulking & weatherproofing job?
Not sure whether your job fits? Type it and get a straight answer before you book.
Type a job and you get an answer straight away. Nothing is sent or saved.
Plan your visit
How booking works, how to get ready, and what to expect where you live.
How booking caulking & weatherproofing 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 caulking & weatherproofing
Quick things that save a trip. Tick them off as you go; none of it is required to book.
Walk the house and mark problem joints
Check every window, door, corner board, vent and pipe. Mark cracked, gapped or missing caulk with painters tape.
Do the business-card test
Slide a business card into the gap between a frame and the wall. If it goes in, air and water can too.
Check for stains inside
Look at window sills, corners and the ceiling below for stains, soft paint or musty smells. They show water is coming through, and the pro should start with those windows.
Decide if you will repaint
If paint is planned, say so in your notes. The pro will use paintable products and schedule the caulk before the paint.
Know your window and siding types
Note whether windows are wood, vinyl or aluminum and what the house is clad in. Different surfaces take different sealants, and the pro can bring the right ones.
Check the weather and reach
Choose a dry spell, and make sure ladders can reach the upper windows. Tell the pro about tall walls, locked gates and pets so nothing delays the visit.
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 caulking & weatherproofing
Best time to book caulking & weatherproofing
Sealants cure best between about 40 and 80 degrees on dry surfaces. Doing the work in early fall seals the house before wet weather and cold, and in spring it repairs the damage of winter. Avoid rainy days and frozen surfaces. 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.
Together
Book caulking & weatherproofing with your neighbors
Every home on the street gets the pro’s neighbor rate, and each one books and pays on its own.
Start a Street Day- Start one
Pick the job, your street, a day and a pro who offers a neighbor rate.
- Share the link
Send it to neighbors. Only the city is ever shown publicly, never your street.
- Neighbors join
Neighbors on your street book the same pro on the same day.
- Everyone saves
Each home gets the pro’s neighbor rate, a percent off the pro’s own price, and books and pays on its own.
Often booked together with caulking & weatherproofing
Book several services with one pro. Pros set their own bundle discounts.
Failed seals and rotted frames around windows often need repair along with new caulk.
Fresh caulk before a repaint gives the new paint a sealed surface that lasts longer.
Air sealing outside and insulating inside work together to cut drafts and energy loss.
Seams and boards that are failing may need replacing, not just resealing.
Around Los Altos
Where in Los Altos the work happens, and the cities close by.
Caulking & Weatherproofing 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.
Crisp, neutral interior repaints are one of the highest-impact moves for pre-listing prep on Los Altos mid-century ranches and Eichlers.
See pros in Los AltosOriginal 1950s-60s ranches and rebuilds in Old Los Altos often need cracks, nail pops, and patches smoothed before paint or sale.
See pros in Los AltosRefreshing dated flooring is a popular high-end finish upgrade for Eichlers and ranch homes being modernized across North and South Los Altos.
See pros in Los AltosFrom punch-list fixes to mid-century maintenance, an up-front handyman visit keeps Country Club and Highlands homes in top shape.
See pros in Los AltosClean, hidden-wire mounts suit the open walls and flat-roof lines of Los Altos Eichlers and contemporary custom rebuilds.
See pros in Los AltosA new deck built, a tired one repaired, or its framing, boards, railing and finish renewed — footings, framing, decking, staining and sealing in wood or composite.
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
Caulking & Weatherproofing reviews in Los Altos
Verified caulking & weatherproofing reviews from Los Altos homeowners will appear here.
Be the first caulking & weatherproofing review in Los Altos
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 Caulking & Weatherproofing in Los AltosFrequently asked