The Topside Attic Insulation Cupertino Guarantee
We stand behind every attic and crawl space job we complete in Cupertino with two things that don’t fit on a truck: a written scope signed before we start, and a 365-Day Done Right Promise that says if it’s not done right, we make it right. Since 2016, we’ve sealed and insulated more than 9,000 homes across the Bay Area, and every single one left with a flat price in writing, a documented photo record of the work, and a warranty that means something if you need it. In Cupertino, where a single unsealed top plate can bleed conditioned air into a vented attic for decades, “done right” isn’t a feeling. It’s a number we measure with a blower-door test before and after, and it’s a crew that doesn’t leave until the photo record is complete and the homeowner has the written warranty in hand.
What’s Covered
- Workmanship on every square foot. We seal first, then insulate, in that order, because blowing fiberglass over an unsealed attic floor is just burying the problem. Our crews air-seal top plates, can lights, wire penetrations, and attic hatches before any insulation goes in, and we publish the before-and-after blower-door numbers so you can see the result in CFM50, not adjectives.
- Parts and materials from brands you can verify. We source Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber. No proprietary lock-in, no mystery products. If we specify R-38 blown-in cellulose, you can look up the bag, the fire rating, and the settling factor yourself.
- Cleanup that leaves no trace. Our crews wear uniforms, pass background checks, and carry vacuums rated for fine particulate. The Documented Photo Record includes shots of the workspace before, during, and after, so if there’s a question about whether we protected your floors or removed every old batt, the answer is timestamped and stored.
- On-time arrival with real communication. Under Haven Standard: Arrive on schedule, you get a named technician and a text when they are on the way. No four-hour windows, no “somewhere between 8 and 5.” If we’re delayed by Cupertino traffic on I-280 or a job in Monta Vista runs long, we call before you have to ask.
- Honest pricing with no variance. Haven Standard Clause 1 is flat price, written scope, written warranty before anyone lifts a tool. The price we write is the price you pay. If we find something unexpected, like active rodent damage in a Sunnyvale attic or compromised ductwork in a Rancho Rinconada crawl space, we stop, photograph it, and write a revised scope with a revised price before proceeding. No open-ended hourly rates, no material markups you can’t audit.
Our Satisfaction Promise

If something isn’t right, call (831) 217-8521. A live person answers 24/7, no voicemail loop, no callback window measured in business days. We’ll schedule a return visit, send the same crew or a senior technician if the issue is technical, and fix it under the 365-Day Done Right Promise. That promise covers workmanship defects, materials that failed to perform as specified, and anything that doesn’t match the written scope you signed. We don’t debate whether a gap around a chimney chase “counts” as a seal failure. We bring the blower door back, we run the test, and if the house is leaking where we said we sealed it, we re-seal it. The make-it-right process is documented with new photos and, on applicable jobs, new blower-door numbers. We’ve had homeowners in Cupertino call us back because they noticed a draft near an attic hatch six months after we left. We returned, found the weatherstripping had compressed more than expected, replaced it with a higher-density gasket, and re-tested. No charge. No argument. That’s what “done right” means when it’s in writing.
Before
AfterLicensed & Insured Backing
The 365-Day Done Right Promise and the Haven Standard paperwork are only as solid as the company behind them. We’re state-licensed and insured & bonded, which means if a technician is injured in your Cupertino home, you’re not exposed. It means if we damage a roof joist during a tight attic access in a Fairgrove condo or a water line during crawl space work in a Garden Gate ranch, our coverage responds, not your homeowner’s policy. Licensing isn’t decorative. It’s the state’s verification that we’ve met the bonding, insurance, and competency requirements to perform building-envelope work in California, and it’s the mechanism that lets you verify our standing with the Contractors State License Board. We carry this coverage because “independently owned and operated” doesn’t mean small or casual. It means Wes Okafor’s name is on the business, and the business is on the hook for every job. The written warranty, the photo record, the blower-door numbers, and the insurance certificate all point to the same thing: when we say we’ll make it right, we have the structure and the backing to do it.
What’s in Your Folder When We Leave

Every Cupertino homeowner receives a physical or digital job folder containing: the original written scope with flat price, the signed warranty document with the 365-Day Done Right Promise, the before-and-after blower-door test results in CFM50, and the full Documented Photo Record. These aren’t available on request. They’re included on every job, automatically, because a guarantee you can’t prove is just a slogan. If you need us in month eleven, you’ll have the paperwork, the photos, and the numbers to show exactly what was promised and what was delivered.
Free Second Opinion on Any Written Estimate
If another Cupertino insulation contractor has given you a written estimate, bring it to us. We’ll read it with you, line by line, and tell you what we see: whether the R-value matches the depth, whether air sealing is included or omitted, whether the price is tied to a scope you can verify. We don’t trash competitors. We explain what’s in the numbers, because Haven Standard Clause 1 applies to every written scope, not just ours. If our price is higher, we’ll show you where the difference lives. If it’s lower, we’ll show you what we’re not cutting. Either way, you’ll leave with information you didn’t have when you walked in.
How to Reach Us

Call (831) 217-8521 any time. A live person answers, 24/7. We serve Cupertino and 14 surrounding communities from our local base, and we’ve been doing this work under The Haven Standard since 2016. If you’re ready to schedule, we’ll set a time, name your technician, and send a text when they’re en route. If you have questions about an existing job or a warranty concern, we’ll pull your file by address and have the photo record and blower-door numbers in front of us before the conversation ends.
Written by Wes Okafor, Owner at Topside Attic Insulation Cupertino, serving Cupertino since 2016.