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Your windows and doors are a thermal hole in the house.
Why glass leaks so much energy
A single pane of glass has almost no insulating value on its own. Heat crosses a window three ways — conducted through frame and glass, carried by drafts around bad seals, and radiated straight through the pane. The last one dominates.
50%
of a home's heating or cooling load can move through fenestration — the single largest envelope pathway.
76%
of the sunlight hitting a standard double-pane window becomes heat inside during cooling season.
– 2/3
of the heat lost through a window escapes as radiant transfer through the glass itself, not the frame.
Choosing sustainable solutions helps your home pass inspection
Sustainable, high-performance windows and doors are essentially what lets you pass Title 24 in the first place — the products that hit the required U-factor (≤0.30) and SHGC (≤0.23) are the well-built, energy-efficient ones: dual-pane, Low-E, quality frames. So compliance and sustainability aren't two separate goals; choosing the sustainable option is how you clear the code.
Every renovation in Orange County has a recycling threshold it has to clear.
Under the county's Construction & Demolition program, permitted projects aren't signed off until they prove diversion. Your old windows and doors are part of that count — and what replaces them is graded on the NFRC label.
65%
Minimum diversion required by weight for applicable C&D projects countywide.
OC WASTE & RECYCLING
$200k
Alteration valuation that triggers CALGreen waste rules – or 1,000 sq ft addition.
CALGREEN §301.3
27%
Share of California's total waste stream generated by construction & demolition
CALGREEN GUIDE
3.4lb
Per sq ft landfill cap that residential projects may use as the compliance alternative.
CALGREEN §4.408.4
That's why we believe in sustainable design.
Why Us?
not only do we care about our planet, we care about you
Three paths. One standard.
1
THE SOURCE
Premium product, delivered
For clients working with their own contractor or simply sourcing the finest materials. We guide you through selecting the right system for your space, then manage secure storage and coordinated delivery — so your product arrives in perfect condition, exactly when you need it.
Secure storage included Coordinated delivery
COMPETITIVE PRICING
SECURE STORAGE
COORDINATED DELIVERY
2
THE CRAFT
Installed right, guaranteed
Our expert installation team manages every detail to ensure your new doors and windows are installed precisely. To get started, the space should be ready for install — existing units removed and the opening prepared. Professional installation isn't just an added service; it's the guarantee that your product performs as designed and your warranty stays fully valid.
3-year service warranty Manufacturer compliant
Manufacturers and dealers will not honor warranty claims on products that weren't installed to spec. An improper installation — even by a well-meaning contractor — can void the protection you paid for. Our team installs these systems daily. We know exactly what the manufacturer requires.
3
THE FULL-SCOPE
Care that doesn't stop at install
We proactively check in after every project to confirm your satisfaction, address any questions, and provide expert guidance on maintaining your investment. This ongoing care reflects our commitment to lasting relationships — and to ensuring your windows and doors continue to perform beautifully for years to come.
Proactive follow-up
Long-term relationship
PURCHASE
INSTALLATION
DELIVERY
FOLLOW-UP SERVICE
3 year service warranty included
We help your project meet California's Title 24 energy standards
The Brands We Stand Behind
sustainable door and window systems engineered with consciousness
one window. one door. one home at a time.
that1doorguy.com
one window
one door
one home at a time
110 Broadway Ste #B
Costa Mesa, CA 92627
Orange County, CA
the chlorophyll of
© 2025 T1DG Solutions LLC