Fontana Window Replacement: Title 24 Windows, Patio Doors & Glass
Expert residential and commercial window and door replacement across the central Inland Empire. Free in-home measure, written per-opening quote, and the code numbers on every line.
Licensed & Insured·Title 24 Paperwork Included·Free In-Home Measure·Se Habla Español
Fontana Window Replacement installs and replaces windows, patio doors, entry doors and sealed glass units across Fontana and the central Inland Empire. We work in welded vinyl, pultruded fiberglass, composite and clad-wood frames, glazed with spectrally selective low-E, argon fill and warm-edge spacers, and we quote the tested U-factor and solar heat gain coefficient for every opening.
The reason we lead with those two numbers is that California decides them, not the showroom. Fontana falls in Building Climate Zone 10, and the prescriptive fenestration package for this zone sets a maximum U-factor of 0.30 and a maximum solar heat gain coefficient of 0.23. A homeowner holding three bids has no way to tell which of them clears both.
So we put the label figures on the estimate, prepare the compliance documentation as part of the job rather than as an extra, and leave the temporary labels on the glass until the inspector has read them. We also handle laminated security and acoustic glazing, egress openings for garage and room conversions, solar screens, residential window film and commercial storefront glass repair across the valley.
Our Window Services in Fontana, CA
Title 24 Compliance & Energy Documentation
Every replacement opening in this city answers to one document before it answers to a salesperson. Fontana sits in California Building Climate Zone 10, and the prescriptive fenestration package for that zone is a maximum U-factor of 0.30 and a maximum solar heat gain coefficient of 0.23.
Energy-Efficient & Low-E Glass Packages
In Climate Zone 10 the two prescriptive numbers are not equally hard. A 0.30 U-factor is routine for any decent dual-pane unit.
Vinyl Windows
Vinyl is the frame that makes the Zone 10 numbers cheapest to reach. A multi-chamber welded vinyl frame with a decent coating clears a 0.30 U-factor without effort and leaves the whole compliance argument resting on the glass, which is where it belongs.
Fiberglass & Composite Windows
Pultruded fiberglass earns its price here for a reason that rarely gets said out loud. It buys label headroom.
Wood & Clad-Wood Windows
The trap with clad wood is not the product. It is the paperwork.
Aluminum Windows
This is the page where the code and the sales pitch disagree. Non-thermally-broken aluminum cannot meet the Zone 10 prescriptive U-factor on a house.
Double-Hung & Single-Hung Windows
Hung windows carry a geometry problem that only becomes obvious in a bedroom. The sash slides inside the frame, so the clear opening you actually get is roughly half the frame, and the emergency escape opening the code wants is measured on the clear opening, not the unit size.
Casement & Awning Windows
Read the air leakage line on a fenestration label sometime. Casements almost always beat hung and sliding units, and the reason is mechanical rather than magical.
Sliding & Gliding Windows
Horizontal sliders are the default frame here, and the ones in your walls are almost certainly the problem. The original single-pane aluminum sliders in Fontana's postwar tracts have no thermal break, a worn wiper seal, and a rating that would fail anything written in forty years.
Bay & Bow Windows
A bay or bow is the one project on this site that reliably changes your compliance category. You are not replacing glass area, you are adding it, and the moment a project adds fenestration the prescriptive ceilings on total and west-facing glass stop being theoretical.
Picture & Architectural Windows
Fixed glazing carries the best numbers in any catalog and the worst answer to one question. No sash, no operator, no weatherstrip to wear out, so the U-factor is lower and the air leakage close to nothing.
Egress Windows & Bedroom Openings
Two codes want opposite things from a bedroom window, and this page is about making them agree. The life safety side wants the opening as large as possible.
Impact-Rated & Security Glazing
We will lead with the part other companies skip. Nothing in the code governing Fontana requires impact-rated glazing on a house.
Window Film & Home Tinting
Film is for the glass you are keeping. That is the whole positioning of this page, and it comes straight from how compliance works.
Patio & Sliding Glass Doors
Here is the rule that catches almost every homeowner comparing bids. A door with twenty-five percent or more glazing area is treated as a fenestration product, not as a door.
French & Swinging Patio Doors
The twenty-five percent glazing rule cuts both ways, and French doors are where it gets interesting. A door at or above it is held to the window line.
Entry Doors & Sidelites
The prescriptive package holds an exterior door to a maximum U-factor of 0.20, in every California climate zone, with no variation by region. That is tighter than the 0.30 the same package asks of your windows, and it is the number most entry door quotes never mention.
Window Screens & Solar Screens
Solar screens are the most misunderstood product we sell, so start with what they are not. They do not change the rating on your window.
Glass Repair & Insulated Glass Units
This is the cheapest page on the site and the likeliest to save you money, because of one distinction in the energy code. Replacing only the glazing or sash while the frame stays put is a repair.
Commercial Storefront & Glass Repair
Commercial glazing answers to a different part of the energy code than anything else on this site. Nonresidential envelope requirements sit in their own prescriptive section with their own tables, and the residential numbers this site talks about elsewhere simply do not apply to a tenant improvement.
Why Fontana Chooses Fontana Window Replacement
- ✓The tested U-factor and solar heat gain coefficient printed on your quote, per opening, before you sign anything
- ✓Climate zone confirmed by address, because Zone 10, Zone 9 and Zone 16 do not ask for the same thing
- ✓Compliance documentation prepared as part of the job rather than billed as an extra at the end
- ✓Reglazing quoted instead of replacement whenever the frames are sound and the glass is the actual problem
- ✓Egress openings measured on net clear opening before any operating type or catalog gets opened
- ✓Glazing that a plans examiner will accept on foothill and mountain addresses, even when it costs us the cheaper sale
About Fontana Window Replacement in Fontana, CA
Fontana Window Replacement is a glazing contractor working across Fontana, Rialto, Bloomington, Colton and the surrounding central Inland Empire. We replace windows and doors, cut and set egress openings, reglaze failed insulated units, fit solar screens and window film, and handle storefront glass for the retail and light-industrial buildings along the freight corridors.
What we do differently is argue the code first. California decides the U-factor and the solar heat gain coefficient your replacement windows have to meet, by climate zone, and most quotes in this market never mention either number. We put them on the estimate per opening, prepare the compliance documentation as part of the job, and let you compare bids on something checkable instead of on brand names and discount theater.
There are jobs we will tell you not to give us. If your frames are structurally sound and the complaint is a fogged or cracked sealed unit, reglazing is a fraction of the cost and skips the alteration paperwork entirely, and we will quote it that way.
If your glass is already decent and two rooms simply get hot in the afternoon, solar screens or film on those elevations beat replacing serviceable windows. And if you are in a foothill address where the fire provisions restrict frame materials, we will send you to a product that costs us margin rather than one a plans examiner will reject.
Service Areas
Fontana Window Replacement serves Fontana, CA and surrounding communities including:
How It Works
Measure and zone check
We measure every opening, note operating type, sill height and net clear opening in each sleeping room, and confirm the building climate zone for the address rather than assuming it. On foothill and mountain addresses we also check whether the wildfire glazing provisions apply, because that decides which frame materials are even available to you.
Per-opening written quote
You get a line for each opening showing frame material, operating type, glass package and the tested U-factor and solar heat gain coefficient for that exact unit and size. If we think an opening should be reglazed rather than replaced, or left alone entirely, that is on the quote too, with the reason and the saving.
Order and compliance paperwork
Ratings are confirmed against the manufacturer's tested configuration before anything is ordered, and the Certificate of Compliance goes in with the permit application. Custom sizes and shapes are templated on site first, because a unit ordered to a plan dimension rather than a measured one is not a returnable item.
Install, document and inspect
Openings are flashed with a sloped sill pan and lapped correctly over the weather-resistive barrier, the gap between unit and rough opening is fully insulated, and the perimeter is sealed with low-expansion foam and a movement-rated sealant. We sign the Certificate of Installation and leave the labels on for the inspector.
Recent Projects Across the central Inland Empire
What Fontana Customers Say
They were the only company out of three that put the U-factor and the SHGC on the quote for each window. Replaced eleven sliders, the back bedrooms are usable in the afternoon again, and the inspection took about ten minutes because the paperwork was already right.
Called them about replacing the whole house and they told me eight of my frames were fine and only needed the glass units swapped. Saved me a large chunk of money and they still came back and did the four that genuinely needed replacing.
We converted the garage into a bedroom and the escape window was the part nobody else would explain. They measured the clear opening, showed me why a casement made the number without cutting the wall wider, and it passed first time.
Old house near downtown, so the clad wood had to be custom sized. They pulled the ratings for the exact units before ordering rather than after, which the inspector clearly appreciated. Sill pans done properly and the stucco patch is invisible.
Storefront glass, entrance doors and tenant-improvement glazing across Fontana's retail and industrial corridors
Commercial glazing runs on a different part of the energy code than residential replacement, with its own envelope section and its own tables, so we keep the two scopes on separate estimates and never let a tenant improvement end up documented as a house.
Most of our commercial work is repair and replacement rather than new construction: a broken lite in an occupied storefront, an entrance door that has stopped closing properly, an office front going into a distribution shell.
Storefront is a stick-built aluminum system, typically the two-inch by four-and-a-half-inch profile, glazed with one-inch insulated units and assembled on site, and matching an existing system matters because a mismatched profile will not take the same glazing gasket.
Nearly every lite in a storefront occupies a hazardous location, so it goes back tempered or laminated and it is made to order rather than pulled from stock. For property managers the thing that actually matters is response time, since a plywood panel across a lease line costs a tenant traffic every day it is up.
We measure on the first visit, secure the opening, order the same day where the size allows, and put board-up, glass and cleanup on one invoice.
- ✓Emergency board-up and same-visit measurement on broken storefront lites
- ✓Stick-built aluminum storefront repair, replacement and profile matching
- ✓Tempered and laminated made-to-order units for hazardous locations
- ✓Entrance door closers, pivots, thresholds and hardware adjustment
- ✓Office-front glazing, interior partitions and vision panels in industrial shells
- ✓Thermally broken and non-broken systems serviced to match what is in the opening
- ✓Nonresidential envelope requirements kept separate from residential paperwork
- ✓Single-invoice board-up, glazing and cleanup for multi-property managers
Frequently Asked Questions
What climate zone is Fontana in for Title 24?
Fontana is in California Building Climate Zone 10. The Energy Commission assigns climate zones by ZIP code, and the 92335, 92336 and 92337 ZIPs all fall in Zone 10, so the whole city takes the same prescriptive requirement. That matters because the requirement is not the same statewide.
Some of the cities we serve in Los Angeles County sit in Zone 9, and the mountain communities above the valley sit in Zone 16, where the U-factor requirement is tighter and there is no solar heat gain limit at all. We confirm the zone by address before quoting rather than assuming the city name settles it.
What U-factor and SHGC do my new windows need to meet?
For Climate Zone 10 the prescriptive package sets a maximum U-factor of 0.30 and a maximum solar heat gain coefficient of 0.23. In practice the second number is the harder one.
Almost any competent dual-pane unit clears 0.30 on the U-factor, while getting under 0.23 on solar heat gain takes a spectrally selective coating rather than a basic one, and that is usually where a cheap bid quietly falls short. Ask any contractor for both figures on the exact unit they are proposing, per opening, in writing.
If they cannot produce them, they have not priced your job.
Do I need a permit to replace windows in Fontana?
Replacing windows is an alteration and it is permitted work, with the energy compliance documented on a Certificate of Compliance at application and a Certificate of Installation signed by the installer afterward. Where it gets interesting is the boundary.
If only the glazing or the sash is being replaced and the existing frame stays in the wall, the code treats that as a repair rather than an alteration. Change the frame and you are in alteration territory. That distinction is worth several thousand dollars on a house with sound frames and failed glass.
Why do you tell me to leave the stickers on the glass?
Because those temporary labels are the evidence. At final inspection the building inspector reads the National Fenestration Rating Council label on each unit and checks it against what the compliance paperwork promised. Peel the labels off early, however much you want the windows to look finished, and there is nothing on site for the inspector to verify.
The values used on the compliance documents have to come from an NFRC label or from the code's own default tables, and the defaults are deliberately unflattering. Leave the stickers on. We will remove them once the job has passed.
Is triple glazing worth it in Fontana?
Usually not, and we will say so before you ask. A third lite mainly improves the U-factor, and in Climate Zone 10 the U-factor is the easy number to make. What actually drives your August electricity bill here is solar heat gain, and that is bought with the coating rather than with an extra pane of glass.
Triple glazing also adds weight, which means sash sag on wide sliders and heavier hardware everywhere. On a house with a lot of west-facing glass, the same money spent on a triple-silver spectrally selective coating will do considerably more for comfort.
I am converting a garage to a bedroom. What changes?
The room becomes a sleeping room, and every sleeping room needs an emergency escape and rescue opening. That means a net clear opening of at least 5.7 square feet, a clear height of at least twenty-four inches, a clear width of at least twenty inches, and the bottom of the opening no more than forty-four inches above the floor.
Net clear opening is the hole a person passes through with the sash fully open, so operating type matters. A casement delivers nearly its full opening where a slider gives you about half, which often means the escape numbers can be made without enlarging the hole at all.