Garage door types compared on the specs that decide the order: mechanism, Kopffreiheit, insulation R-value, wind-rating path, and which type sells in which market.

Tilt and turn window sizes are capped by hardware load ratings, not size charts. Get the published sash envelope, the weight math, and the quote fields.

Slab door vs prehung for importers: what each form includes, published US price ranges, the freight envelope per unit, and when aluminum overrides the rule.

Fixed windows seal better and quote cheaper than any operable, but they never ventilate or serve as an exit. Real size caps, code limits, and pairing rules.

Egress window requirements are three numbers that must pass together: 5.7 Quadratfuß, 24 In, 20 In. Sizing by operating style, well rules, and install steps.

Transom windows add light, Luft, and a taller entry elevation, but only where the wall can take them. Check sizes, header loads, code triggers, and spec traps.