New windows can make a home quieter, more comfortable and easier to heat and cool. With so many options, it helps to know what to compare.
Read the label
Most windows sold in the U.S. carry a label from the National Fenestration Rating Council (NFRC). It lists performance ratings, including:
- U-factor: how well the window keeps heat from escaping. Lower numbers insulate better, which matters in Michigan winters.
- Solar heat gain coefficient (SHGC): how much heat from sunlight passes through. The right number depends on the window's direction and how much winter sun you want.
- Air leakage: how much air passes through the window's joints. Lower is better.
ENERGY STAR also lists recommended ratings by climate zone. Michigan falls in the Northern zone.
Compare frame materials
- Vinyl: common, low maintenance and usually budget-friendly.
- Wood: classic look and good insulation, but needs more upkeep on the outside unless it's clad.
- Fiberglass: strong and stable through temperature swings.
- Composite: blends materials for durability with a wood-like look.
Your choice depends on the look of your home, how much maintenance you want and your budget.
Pick the right style
Double-hung, casement, slider, awning and picture windows each open differently. Casement windows seal tightly when closed. Double-hung windows suit many traditional homes. Think about how each room is used, where you need airflow and what's easy to reach and clean.
Insert or full-frame replacement?
An insert replacement fits a new window into the existing frame. It's less invasive and keeps interior trim in place. A full-frame replacement removes the old window down to the rough opening. It lets the installer inspect for rot, add insulation and flash the opening fully. It's often the better choice if the frame is damaged or water has gotten in.
Installation matters as much as the window
Even a high-performing window can leak air or water if it isn't installed well. Proper flashing, shimming, insulation around the frame and sealing keep the window working as rated.
Older homes and lead
If your home was built before 1978, the old window frames may have lead-based paint. Replacing them should follow lead-safe work practices to protect your family.
Learn more about our window replacement process.
