Technical resources
Reference material for specifiers and contractors, written from the manufacturer’s own technical documents and from published government sources. Where a figure comes from a standard rather than from us, the page says which standard and links it.
Choosing glass coating by climate zone
Which Low-E coating suits each ENERGY STAR climate zone, the EPA threshold table for residential windows, and why the Northern zone has two ways to qualify.
Read →Egress window requirements
Clear width, clear height and clear area for an escape window, which operator types cannot be used for egress at all, and why the manufacturer’s minimums are not the same numbers as the building code.
Read →Joining window combinations for large openings
How multi-unit window combinations are joined in the factory rather than on site, the 1 1/8 inch joining mullion, and the three reinforcement grades selected by window height.
Read →Window installation methods
The mounting options available, which suit new construction versus replacement, and what each one asks of the surrounding wall.
Read →Thermal breaks in aluminum windows
Why bare aluminum conducts heat, what a polyamide strut changes, and how to read a thermal-break spec instead of taking the phrase on trust.
Read →How tilt and turn windows work
The two opening modes, what each is for, the egress consequence most specifiers miss, and where a tilt and turn is the wrong choice.
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