Wood Windows Inc is not an authorized Sierra Pacific dealer. We service, repair, and replace Sierra Pacific windows and doors throughout the Treasure Valley.
Specifications & Testing Data
| Frame material | Fusion Technology hybrid — 0.055 in extruded aluminum exterior cladding over a 0.078 in vinyl base frame with a solid wood interior treated with CoreGuard Plus preservative |
|---|---|
| U-factor (NFRC) | 0.24 – 0.31 |
| Solar heat gain coefficient (NFRC) | 0.2 – 0.35 |
| Design pressure (DP) rating | Varies by unit, size, and configuration — verify per unit in the NFRC directory and manufacturer performance data |
| ENERGY STAR zones | Northern (with qualifying glass packages — verify per unit) |
| Glass options | Dual-pane Low-E, Triple-pane with double or triple Low-E coatings, TrueWarm no-metal edge spacers, Tempered, Obscure/privacy |
| Available styles | Casement, Awning, Double-Hung, Sliding, Picture & Direct Set, Specialty shapes |
Wood Windows Inc is not an authorized Sierra Pacific dealer. We service, repair, and replace Sierra Pacific windows and doors throughout the Treasure Valley. We see these windows regularly in Boise-area custom homes, and this page is the reference we wish existed for their owners.
What the H3 Actually Is
Sierra Pacific Windows is the window division of Sierra Pacific Industries, one of the largest lumber companies in the United States, based in Red Bluff, California. The H3 is its flagship line, built on what the company calls Fusion Technology: three materials in one frame. A 0.055-inch extruded aluminum skin faces the weather — roughly twice the thickness of the roll-form cladding most competitors use. Behind it sits a 0.078-inch vinyl base frame that provides rigidity, rot protection, and a thermal break. Inside is solid wood treated with the CoreGuard Plus preservative, available in eight species from standard pine to black walnut and white oak, with fifty exterior powder-coat finishes meeting the AAMA 2605 coating standard.
It is a well-engineered window, and we say that as a company that does not sell it.
The Numbers That Matter
Sierra Pacific offers dual- and triple-pane glazing with double or triple Low-E coatings, assembled with TrueWarm no-metal foam edge spacers that reduce heat conduction at the glass perimeter. Configured that way, typical units land roughly in the 0.24–0.31 NFRC U-factor range, with triple-pane packages at the better end — but ratings vary meaningfully by style, size, and glass, so verify your exact configuration per unit in the NFRC directory or on the unit's label rather than trusting a range on any website, including this one.
The warranty is genuinely strong: 20 years on insulated glass, 30 years on the AAMA 2605 residential clad finish, 10 years on parts, 2 years on labor, fully transferable.
Where You'll Find Them in Idaho — and What Goes Wrong
Sierra Pacific shows up in Treasure Valley custom and semi-custom homes, particularly foothills and Eagle builds from the last two decades where architects wanted clad-wood at a sharper price than the East Coast brands. What we get called about is what fails on every clad-wood window eventually: fogged insulated glass units, casement operators and hinges wearing out, weatherstripping going flat, and finish touch-ups after hail or construction damage.
The good news for owners: none of that requires the original dealer. Glass units can be matched by dimensions and spec, most hardware is sourceable, and our carpenters have been rebuilding and re-glazing clad-wood windows since 1980.
Repair, Parts, or Replacement — Your Three Paths
Under warranty, start with Sierra Pacific directly and keep your paperwork. Out of warranty, we repair what's economical and tell you when it isn't. And when a unit — or a whole elevation — is done, we quote replacements from the clad-wood lines we carry and service in-house, like the Andersen 400 Series and Marvin, matched carefully to your existing sightlines.
Own Sierra Pacific windows that need attention? Call (208) 376-2200 — 46 years in the valley, our own employee installers on every job.
Frequently Asked Questions
Who services Sierra Pacific windows in the Treasure Valley?
We do. Wood Windows Inc is not an authorized Sierra Pacific dealer, but our crews have serviced clad-wood windows in Boise custom homes for 46 years — Sierra Pacific included. Fogged insulated glass, hardware and lock failures, weatherstrip replacement, sash issues: we repair what's economical and replace what isn't, always with our own employee installers, never subcontractors.
What makes the Sierra Pacific H3 different from a normal clad-wood window?
Most clad-wood windows are two materials: an aluminum skin over a wood frame. The H3 is three — an extruded aluminum exterior, a vinyl base frame in the middle, and a solid wood interior. The vinyl layer acts as a thermal break and rot barrier between the metal and the wood, which is a genuinely clever piece of engineering and part of why Sierra Pacific competes well in the custom-home market.
Can I get parts or warranty service for my Sierra Pacific windows?
Sierra Pacific backs current residential products with 20-year insulated glass coverage, a 30-year AAMA 2605 clad finish warranty, 10-year parts, and 2-year labor — fully transferable — through its Red Bluff, California headquarters (800-824-7744). For units outside warranty, or when you want a local crew to diagnose and handle the work, call us. We source compatible glass and hardware or replace the unit when that is the smarter spend.
My home has Sierra Pacific windows and a few have failed. Should I match the brand when replacing?
Not necessarily. Since we're not a Sierra Pacific dealer, we can't quote new H3 units — but the clad-wood category is competitive, and lines we carry such as the Andersen 400 Series and Marvin's clad lines deliver comparable construction and NFRC numbers with local, in-house warranty service. On a partial replacement we match sightlines and finishes carefully so new units sit beside originals without looking like patchwork.
Sources & Testing Data
Last reviewed 2026-07-05 by Wood Windows Inc — (208) 376-2200