Reading the NFRC Label and the Egress Rules Before You Buy Windows

Published July 1, 2026

Most window shopping starts with the frame color and ends at the price. The two things that actually decide whether a window is a good buy in Grand Rapids are printed on a sticker and written in the building code. Here is how to read both before you sign anything.

Start With the NFRC Label

Every rated window carries an NFRC label, and it lists four numbers worth knowing. The U-factor measures how fast heat escapes, and in a Michigan winter you want it low. The Solar Heat Gain Coefficient tells you how much of the sun’s heat comes through. Visible Transmittance is how much daylight you get, and Air Leakage rounds it out. When a salesperson talks about efficiency without pointing at that label, ask to see it.

Match the Numbers to the Climate Zone

A window that is perfect in Georgia can be the wrong pick here. Grand Rapids sits in a cold IECC climate zone, so the U-factor carries more weight than the solar number. An ENERGY STAR unit with low-E glass, argon fill, and warm-edge spacers usually hits the target, but the label is what proves it. That is the whole idea behind our energy-efficient windows service: pick the glass by the rating, not the brochure.

Do Not Skip the Egress Check

If any of the windows are in a basement bedroom, the code is not optional. IRC R310 requires an emergency escape opening of at least 5.7 square feet with a sill no higher than 44 inches off the floor. A window that looks fine can still be too small to legally serve a sleeping room. Enlarging that opening is real work, so it is worth confirming early. Our egress and basement windows service handles the cut, the well, and the drainage together.

Know When Safety Glass Is Required

Code calls for tempered or laminated safety glass in certain spots, such as within 24 inches of a door, close to the floor, or near a tub or stairs. This is easy to overlook on an order, and it is the kind of miss an inspector catches. A good installer flags those openings before the units are ordered, not after.

Ask Who Pulls the Permit

For a like-for-like insert swap, a permit often is not needed. For a new egress well or a structural change, it is. Get a straight answer on which category your project falls into on a street like Plainfield Avenue, and make sure the installer, not you, is handling the inspection.

Planning a window project in Grand Rapids? Contact us or call Ayearofkilling at (616) 230-2945 for a free, code-first assessment.