Practical guides for window and door manufacturers.

Written from the problems we solved putting a working window plant onto Extrusia — the arithmetic, the rules and the shop-floor details that decide whether the paperwork agrees with the window.

Mulled window size calculator (free tool)Centerline and frame sizes for every opening of a mulled unit. How to size and price mulled windowsCenterline size vs frame size: which one prices and which one cuts, with a worked example. When must window glass be tempered?Building-code hazardous locations, supplier size limits, and how a configurator should handle each. What goes on an NFRC labelThe five ratings, why glass and grids change them, and printing the right label per window. One glass sticker per sealed unitWhy per-pane and per-window glass labels miscount, and how to pair panes into IG units. Dealer pricing explainedPrice levels and multipliers, stacked discounts, customer terms and the dealer's own markup. Vinyl cut lists: sticks and feetWhy feet ÷ stick length undercounts, saw order, and how precise a cut length should be. Window and door glossaryMulls, lites, IG units, SHGC, U-factor, united inches and more, defined. Switching ERP without pricing errorsThe parity gate, the parallel run and a cutover that keeps the floor moving. How to choose window and door ERPTwelve capabilities that matter and the demo questions to ask.

Practical guides for window and door manufacturers.

The best demo is your own catalog.