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 | Welded multi-chamber vinyl (2-1/4 in mainframe on Builders' tier, 3-1/4 in on Designers' and Premium; 4-5/8 in on sliding patio doors), European white or beige, optional Ultrabond painted exterior in 14 colors |
|---|---|
| Design pressure (DP) rating | Brochure badges show DP50 on Designers', Premium, casement and awning units; 800/850 sliding patio door rated DP-45 — size-dependent, verify per unit |
| Glass options | 3/4 in dual-pane Low-E (all tiers), 1 in triple-pane IG (Premium and Designers'), Cardinal LoE-366, LoE-340, LoE-180, Intercept warm-edge spacer, Tempered, Decorative and obscure glass, Grilles between glass or simulated divided lite |
| Available styles | Builders' Single Hung, Designers' Single Hung, Premium Double Hung, Horizontal Slider (single, double, triple lite), Casement, Awning, Picture and transom, Special shapes, 800/850 Sliding Patio Door |
Wood Windows Inc is not an authorized Sierra Pacific dealer. We service, repair, and replace Sierra Pacific windows and doors throughout the Treasure Valley. This page covers the company's vinyl line, which is a different animal from the clad-wood windows most people picture when they hear the name.
What the 8000 and 8500 Series Actually Are
Sierra Pacific got into vinyl in August 2014 when its parent, Sierra Pacific Industries, bought Hurd Windows and Doors along with Hurd's vinyl subsidiary, Superseal, and moved production into the Merrill, Wisconsin plant. The 8000 Series (new construction, with integral nailing fin) and 8500 Series (replacement, no fin) are that product wearing the Sierra Pacific badge. Older brochures even send you to Superseal's website for the thermal data.
Inside each series there are three tiers, and the tier matters more than the series number:
| Tier | Mainframe | Balances | Glass | Notes |
|---|---|---|---|---|
| Builders' Single Hung | 2-1/4 in multi-chamber | Spiral | 3/4 in dual IG | Interior-glazed top sash, tilt-in bottom, three frame types |
| Designers' Single Hung | 3-1/4 in multi-chamber | Constant force | 3/4 in dual IG | Contoured exterior, sloped sill, integral J-channel |
| Premium Double Hung | 3-1/4 in multi-chamber | Constant force | 3/4 in or 1 in (triple capable) | Both sashes tilt, low-profile auto tilt/lock latch, contoured glazing bead |
Casements and awnings ride the 3-1/4-inch frame with multi-point locks; the 800/850 sliding patio door uses a 4-5/8-inch multi-chamber frame. Frames come in European white or beige vinyl, or painted in 14 Ultrabond colors with a separate 10-year finish warranty. All tiers are welded sash and frame with Fin-Seal weatherstripping and an Intercept warm-edge spacer, which is a metal spacer, unlike the foam TrueWarm spacer on Sierra Pacific's wood products.
The Numbers That Matter
Sierra Pacific certifies the vinyl line to NFRC and WDMA standards but does not print U-factors in its brochures, pointing instead to the online performance data. For a 3-1/4-inch multi-chamber vinyl frame with 3/4-inch Low-E argon glass, the realistic band is the high 0.20s U-factor, meeting the 0.30 threshold Idaho's zone 5B calls for on most styles; the 1-inch triple-glazed Premium units test into the low 0.20s. The Cardinal glass menu is the same one the wood lines use: LoE-366 for solar control, LoE-340 for glare, LoE-180 for passive solar gain on a north-facing wall. Look for the CPD number etched in the spacer and pull your exact unit from the NFRC directory before assuming anything.
Structurally, brochure badges show DP50 on the Designers', Premium, casement, and awning units and DP-45 on the sliding patio door, with the usual caveat that ratings shrink as sizes grow.
Where It Fits in Idaho — and Where It Doesn't
We see 8000 Series vinyl mostly in production and semi-custom homes from about 2015 onward where a lumber yard already carried Sierra Pacific clad-wood for the front elevation and priced vinyl for the sides and back. That mixed-brand-within-a-brand approach is common in the Meridian, Kuna, Star, and Nampa subdivisions of that decade. The 8500 Series shows up in remodels done through Sierra Pacific dealers.
How it ages is how all quality vinyl ages in a high-desert climate. The insulated glass seal is the mortality point, typically 12 to 20 years with west and south exposures first. The metal Intercept spacer means edge-of-glass condensation shows up a few degrees sooner than on foam-spacer windows, which is a comfort issue more than a defect. Balances and sash locks on the Builders' tier wear sooner than the constant-force hardware on the upper tiers. Painted exteriors have held up reasonably; dark paint on an unshaded south wall is where we look for movement.
Where this line is not the right long-term answer is a home where the owner wants dark frames on brutal sun exposure, or a 30-year horizon. That is a fiberglass conversation, and we will have it honestly.
Your Replacement Paths
Glass-only swaps into sound frames. Single-window matched replacements where one unit has failed. And full replacement when the count of failures says so, quoted like-for-like from the quality vinyl we carry and service in-house: the Milgard Tuscany V400 as the direct tier match with Milgard's Lifetime Limited Warranty and an optional Full Lifetime upgrade covering glass breakage, the Milgard Trinsic V300 for a slimmer modern frame, the Prime 9000 Series for new-construction vinyl, or the Prime 9000 Series where a builder needs new-construction fin frames at volume.
Warranty and Service, Locally
Sierra Pacific's vinyl warranty, effective August 1, 2020 for products made after July 1, 2020, is a 20-year warranty, not lifetime: 20 years on the vinyl mainframe and dual insulated glass, 10 years on triple glass, hardware, and painted finish, 2 years on glass stress cracks, and 2 years on labor, transferable to a later owner of the same house. Claims go to Sierra Pacific at 800-824-7744. For out-of-warranty work, or when you want the people who fix it to be twenty minutes away, our employee installers, never subcontractors, have been handling vinyl glass, balances, and replacements from Garden City for 46 years.
Fogged or sticking Sierra Pacific vinyl? Request a quote on this page or call (208) 376-2200.
Warranty, line by line
Dual-pane insulated glass 20 years · Wood deterioration 20 years · AAMA 2605 clad finish 30 / 25 / 20 years · Parts: hardware, weatherstrip, standard screens, wood components 10 years · Labor 2 years from manufacture · Vinyl products (separate document) 20 / 20 / 10 years. Labor: Two years from the date of manufacture, only when Sierra Pacific elects to repair or replace, and excluding repainting or refinishing. After that, all labor is the owner's. Read the full breakdown →
Frequently Asked Questions
Is Sierra Pacific vinyl the same window as the Sierra Pacific clad-wood my neighbor has?
No. The wood and clad-wood lines are built in Red Bluff, California and Merrill, Wisconsin; the vinyl 8000 and 8500 Series descend from Superseal, a vinyl maker Sierra Pacific acquired with Hurd Windows in 2014, and are produced in the Merrill plant. They share the Sierra Pacific name, glass menu, and dealer network, but the frame engineering, spacer, and warranty are different products entirely.
My Sierra Pacific vinyl windows are fogging. Repair or replace?
Fog between the panes is a failed insulated glass seal, not dirt. On frames under about 15 years that are still square and gliding, a glass-unit swap makes sense and we do it regularly. Once several units in a house have gone, or balances and locks are failing alongside the glass, full replacement is usually the better spend. We quote both after seeing the windows.
How much does it cost to replace Sierra Pacific 8000 or 8500 Series vinyl windows?
Like-for-like quality vinyl such as the Milgard Tuscany V400 typically installs in the high hundreds to low four figures per opening in the Treasure Valley, less for small single hungs and more for large sliders and patio doors. A step up to fiberglass adds roughly a third. Those are broad typical ranges only; we measure and quote each opening.
What is the difference between the 8000 Series and 8500 Series?
Same frame families, different installation. The 8000 Series is the new-construction version with an integral nailing fin and optional integral J-channel or brickmould frame; the 8500 Series is the replacement version made to fit an existing opening without a fin. Within each, the Builders' Single Hung is the lighter 2-1/4-inch frame with spiral balances, while Designers' and Premium step up to a 3-1/4-inch multi-chamber frame, constant-force balances, and triple-glazing capability.
Sources & Testing Data
- Sierra Pacific 8000 Series new construction vinyl brochure, 2021 (PDF) ↗
- Sierra Pacific vinyl window lineup (8000 and 8500 Series product listing) ↗
- Sierra Pacific Limited Warranty for Vinyl Products, effective August 1, 2020 (PDF) ↗
- Sierra Pacific Industries completes acquisition of Hurd Windows and Doors (Superseal), 2014 ↗
- NFRC Certified Products Directory ↗
Last reviewed 2026-09-10 by Wood Windows Inc — (208) 376-2200