Windows for Your House

House windows sell through home centers, window dealers and installers. Measure and check ratings first.

Updated Oct 23, 2026. Edited by: Ilyass Ben Hakim.

Where to buy

Home centers stock standard sizes and order custom ones. Brand dealers and local installers measure, supply and fit windows. Get at least three written quotes.

Professional insight

Window installers say fitting quality matters as much as the window. A poor install leaks air and water.

Ask whether the quote is insert or full frame replacement.
Check the sill and frame for rot before ordering.
Pick U-factor for cold areas and SHGC for hot areas.
Homes built before 1978 may have lead paint.

Check the label

NFRC label with U-factor, SHGC and visible transmittance.
ENERGY STAR label and the climate zones it covers.
Air leakage rating, if listed.
Rough opening or unit size in inches.
Frame material, such as vinyl, wood, fiberglass or aluminum.
Glass type, such as double pane, low-E or tempered.
Warranty terms for glass seal, frame and labor.

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Types

Common house window styles
Style	Opens	Good for
Double hung	Both sashes slide up and down	Most rooms, easy cleaning
Casement	Cranks outward on a side hinge	Tight seal, hard to reach spots
Slider	Sash slides sideways	Wide, short openings
Awning	Hinged at top, opens outward	Ventilation in light rain
Picture	Does not open	Views and maximum light

Specs to match

Lower U-factor means less heat loss.
Lower SHGC blocks more solar heat.
ENERGY STAR groups the US into four climate regions.
Tempered glass is required near doors, floors and bathtubs.
Bedrooms need egress size openings under building codes.

Buying steps

1List each window, its room and its current style.
2Measure width and height at three points each.
3Look up your ENERGY STAR climate zone.
4Get written quotes with the same specs.
5Check permits and installer license and insurance.
6Confirm lead time and who removes old windows.

Common questions

Can I install windows myself?: Insert windows are a skilled DIY job. Full frame work is best left to pros.
Is vinyl or fiberglass better?: Fiberglass is stronger and more stable. Vinyl usually costs less.
Are there rebates for efficient windows?: Some utilities and programs offer them. Check before you buy.