Quaker Windows & Doors Manchester: Specs, Testing Data & Idaho Fit

Wood Windows Inc is not an authorized Quaker Windows & Doors dealer. We service, repair, and replace Quaker windows and doors throughout the Treasure Valley.

Specifications & Testing Data

Wood Windows Inc is not an authorized Quaker Windows & Doors dealer. We service, repair, and replace Quaker windows throughout the Treasure Valley. This page is for the homeowner who already has Manchester windows — usually because a builder or lumber yard supplied them — and wants to know what they own, what the warranty says, and what to do when one fails.

What the Manchester Actually Is

The Manchester is the entry point to Quaker's residential vinyl lineup, and "entry" is doing less work here than it usually does. Quaker Windows & Doors is a family-owned manufacturer in Freeburg, Missouri that has spent most of its 75-plus years building commercial and architectural windows, and the Manchester borrows from that side of the plant: extrusions in 100% virgin vinyl rather than reground scrap, framing Quaker says is 20% thicker than many leading brands, metal reinforcement in the meeting rails and lock zones, and fusion welds at every corner of frame and sash.

Inside the Quaker family it sits below VuPoint (the 3-1/4" metal-reinforced deluxe vinyl frame) and beside AdvantEdge (the same general recipe tuned for pocket replacement). Above all three sit the clad-wood Brighton and TimberVu and the aluminum CityVu. In the market at large, Manchester's peers are mid-tier vinyl like Milgard Tuscany and Prime 9000 — the tier we carry and the tier we compare it to below.

Styles cover the whole residential deck: tilt-in double hung and single hung, casement and awning with fold-down handles and the removable FlexScreen, horizontal slider on tandem brass rollers, three picture-window models, and a long list of geometric shapes (arch head, half round, octagon, trapezoid). Screens use BetterVue mesh. Colors are white, sandstone and beige in solid vinyl, a textured black laminate, and a painted-exterior palette from dark bronze to holly green. If you are trying to identify what you have, the solid-vinyl frame with a visible nail fin under the siding and an "i89"-etched interior glass surface is the usual tell.

The Numbers That Matter

Quaker publishes per-style ratings on its product pages, and they hold up well for a value vinyl line:

The spread inside each row is the glass package. Every Manchester ships with a dual-sealed 3/4" insulating unit on a warm-edge spacer, and the room-side LoĒ-i89 coating is standard, which is why the U-factors sit a couple of hundredths below what you'd expect from a single-coat Low-E vinyl window. EnergyBasic (LoĒ²-272 with argon) is the baseline. EnergyPlus adds the i89 layer for the best U-factor at moderate solar gain. Energy 3S and EnergyMax swap to triple-silver LoĒ³-366 to pull SHGC down to the 0.18–0.22 range. EnergyNorth goes the other way — high gain for passive-solar designs. EnergyTG triple pane, where offered, reaches about 0.21–0.24 on a casement.

Structurally, the operating styles carry an R-40 Performance Grade, which corresponds to a 40 psf structural test load and roughly 6 psf water resistance. That is a residential rating, appropriate to its price. Quaker also cites an STC number more than 10% better than ordinary dual-pane vinyl, thanks to glass it says is 33% thicker than many competitors'.

Your specific unit's numbers are on its NFRC label (often still on the glass in a closet or garage window) and in the NFRC directory; that beats any brochure range.

How It Ages in Idaho — and What Usually Fails

Quaker's residential vinyl is a relatively recent arrival in Treasure Valley housing, so most Manchester units here are young. The field notes below are about vinyl windows of this construction generally — fusion-welded, multi-chamber, dual-pane on a warm-edge spacer — and about what zone 5B does to them over 10 to 25 years.

• Insulated glass seal failure. The first thing to go on almost any dual-pane vinyl window. Fog, haze or a water line between the panes means the spacer seal has let argon out and moisture in. West- and south-facing units fail first because daily thermal cycling works the seal hardest. On a healthy frame this is a glass-unit swap, not a window replacement.
• Dark exteriors on hard exposure. Painted and laminated dark finishes over vinyl run hot in July sun. Windows of this construction commonly show finish chalking, and occasionally sash bow, on unshaded south and west walls after 10–15 years. Quaker's 10-year finish warranty is written with that in mind.
• Balances, rollers and locks. Tilt-hung balances lose tension, slider rollers flatten, and cam locks stop pulling the sash tight. All are routine, inexpensive repairs.
• Weatherstrip compression. Drafts that appear at year 12 or 15 are usually pile or bulb weatherstrip that has taken a set, not a failed frame.
• Screens and FlexScreen frames. Consumables; they replace easily.

None of that is specific to Quaker. Manchester's virgin vinyl and metal reinforcement should, if anything, hold the frame squarer than lighter builder vinyl. The R-40 rating is worth remembering on exposed lots, where a CW-rated frame would have been the stronger original specification.

Warranty and Service, Locally

Quaker's residential limited warranty (June 2024 edition) covers the original homeowner for as long as they own and occupy the home. Insulated glass is covered for 20 years, the vinyl frame and sash for 20 years against peeling, rot, flaking, blistering or corrosion, and hardware — locks, balances, rollers, screens, weatherstrip — for 10 years. Painted vinyl exteriors carry a 10-year finish warranty. Labor is included for the first year only, and the warranty does not transfer to a subsequent owner. Above 3,500 feet Quaker requires factory capillary tubes and limits the glass warranty to 10 years — not a Boise or Nampa concern, but real for a cabin near Idaho City.

Warranty claims on Quaker units go through Quaker and the dealer or lumber yard that originally sold them; if you are the original owner with a fogged unit inside 20 years, start there and keep your paperwork. If you bought the house from someone else, the warranty ended at the sale, and the fix is out of pocket — which is where we come in.

Wood Windows Inc has worked on windows in the Treasure Valley for 46 years with our own employee crews out of Garden City, never subcontractors. On Manchester units we replace fogged glass units, swap balances, rollers and locks, renew weatherstrip, and re-square sticking sashes. When a window is past economical repair, the like-for-like replacements we carry are the Milgard Tuscany (same tier, Milgard's Lifetime Limited Warranty, with the paid Full Lifetime upgrade adding glass breakage and lifetime labor), the slimmer Milgard Style Line, and the Prime 9000 Series for a value full-frame job. We match sightlines and color as closely as the market allows.

Have Quaker Manchester windows that are fogging, sticking, or due for replacement? Use the form on this page or call (208) 376-2200.

Last reviewed 2026-09-10 by Wood Windows Inc — (208) 376-2200