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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

Three paths. One standard.
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Competitive Pricing
We work together to get you the best prices for your sustainable goals.
White-Glove Service
We offer the full package for clients who want product, delivery, framing and install all the way up to the stucco.
Installation & Delivery Options
We have coordinated delivery, storage and install options that suit your project's needs.

THE SOURCE
You have the crew. We have the product.
You have the crew. We have the product.
For homeowners and contractors who need the doors and windows themselves — nothing more. We help you choose, price it competitively, store it safely, and deliver on your schedule.

THE OPENING
Your wall is ready. We supply and install.
Your wall is ready. We supply and install.
Your framing is done and the opening is waiting. Same product, same pricing, same delivery — with our installers setting the system to spec.

THE CRAFT
White glove. Bare wall to ready to paint.
White glove. Bare wall to ready to paint.
We cut and frame the opening, install the system, then carry the work through flashing, waterproofing, and finished to stucco, ready for paint. Same competitive pricing on product, plus a 3-year service warranty layered on top of the manufacturer's coverage.

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
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