Here are the key features and styles you should consider when shopping for new windows.

Over the years the weather will take it’s toll on your windows.

Damaged windows can lead to bigger issues with water gaining access to wall cavities and your foundation.

The first steps to buying new windows is to determine your needs, design, budget and window functions.

Choose Your Window Materials

New windows are available in wood, aluminum, vinyl, and fiberglass.

Wood window sashes can be replaced to update a drafty window, but they require a bit more maintenance.

Clad-frame windows feature an aluminum or vinyl shell.

Fiberglass composite windows are stronger than vinyl, but are slightly more expensive.

Single-pane glass is outdated in most situations and suitable only in very mild climates or in outbuildings.

Double-pane windows have a sealed air space between the layers of glass to reduce heat loss.

As with the double-pane, this gas provides a layer of insulation.

Higher R-values mean better insulating properties.

Triple-pane windows are in the 5-7 R-value range.

Conversely, U-factor is the rate at which a window, door or skylight conducts non-solar heat flow.

The lower the U-factor, the more energy-efficient the window, door, or skylight.

And don’t forget: If you buy an Energy Star rated window, check for available tax credits.

Here are a few types to consider.

They’re usually taller than they are wide, and they provide top to bottom ventilation.

Casement windows offer an unobstructed view, along with a more contemporary and modern look.

Double-Hung Windows

Double-hung windows slide up and down and offer a traditional look.

Modern day double-hung windows have a spring mounted mechanism instead of the old weight and pulley style .

They do offer an unobstructed view like casement windows.

Manufacturers will customize the frame jambs to match whatever wall construction you have.

Find your wall thickness by measuring the jamb width on an existing door or window.

Most good windows must be custom ordered several weeks in advance.

Don’t be overconfident about the delivery schedule.

It’s extremely risky to remove existing windows prior to the delivery of your new windows.

Photos byReuse Warehouse,Scott Lowe,Phil Romans, andMarvin Windows.