What Is a Window Wrap? Cost, Materials, and When Your Home Needs One

Updated July 2026. A window wrap is custom bent aluminum trim that covers the exterior wood frame around a window, sealing it against water and ending the repaint cycle forever. Window wrapping typically costs $100 to $300 per window in the Pittsburgh area and is one of the smartest low cost exterior upgrades, especially paired with replacement windows. Here is how it works.

A window wrap, also called window capping, is a piece of aluminum trim coil custom bent to fit over the exterior wood trim around a window, sealing that wood away from rain, snow, and sun for good. Professionally installed aluminum window wrap typically costs $100 to $300 per window in our area, depending on trim size, window height, and how much prep the old wood needs. Once it’s on, you can expect 20 to 30 years without ever picking up a paint scraper again.

We’ve wrapped thousands of windows around Irwin, North Huntingdon, Greensburg, and the eastern Pittsburgh suburbs since 1995, and it remains one of the highest value exterior upgrades we install. Here’s everything you need to know before you get a quote.

What Exactly Is a Window Wrap?

Every window with wood trim, brickmould, or a wood sill has exposed lumber facing the weather. A window wrap covers that lumber with metal. The installer measures each piece of trim, then uses a tool called a brake to bend flat aluminum coil stock, usually .019 inch thick with a factory baked enamel finish, into a precise profile that matches your trim. Each piece is fitted, fastened, and sealed so water sheds off the face instead of soaking into the wood behind it.

You’ll hear a few names for the same thing. Window capping, window cladding, trim wrap, and aluminum coil wrap all describe this process. Some installers use PVC coated aluminum for extra durability. Whatever the label, the idea is identical: put a permanent, weatherproof, paint free skin over wood that would otherwise need scraping and repainting every three to five years.

Why Wood Trim Fails So Fast in Western Pennsylvania

Our weather is a wood trim assassin. We cycle above and below freezing dozens of times each winter, so any moisture that soaks into the trim expands as it freezes and pries the wood fibers apart. Lake effect snow piles against sills, spring rains hammer the west faces, and summer sun cooks the paint until it cracks and lets the next round of water in deeper. On the 1950s ranches and 1970s colonials all over our area, we routinely find sills and brickmould that look fine from the driveway but crumble under a screwdriver.

Once trim rots, water has a path toward the window frame and the wall itself. That’s when a cosmetic problem becomes a structural one.

The Four Big Benefits of Wrapping Your Windows

1. Real weather protection. Aluminum doesn’t rot, warp, or peel. A properly wrapped and sealed window sheds water at every joint, which protects the trim, the frame, and the wall behind them through every freeze and thaw cycle we can throw at it.

2. The end of painting. The average homeowner pays several hundred dollars per round to have exterior trim scraped, primed, and painted, and it needs doing every few years. Wrap once and that chore disappears from your list permanently.

3. A cleaner, sharper look. Crisp metal lines frame each window like a picture. Modern coil colors go far beyond builder white. Deep, rich grays like Deep Granite have become the favorite on our jobs lately, pairing beautifully with everything from white siding to bold shades like Newport Bay. Matching your wraps to your soffit, fascia, and gutters ties the whole exterior together.

4. More value at resale. Buyers and home inspectors both love the phrase “maintenance free exterior.” Wrapped windows signal a cared for house, and unlike a lot of upgrades, they show from the curb.

What Does Window Trim Wrap Cost?

For most homes we work on, aluminum window wrap runs $100 to $300 per window installed. A whole house with 10 to 15 windows typically lands between $1,500 and $4,000. A few things move the number:

• Trim size and style. Wide colonial casing or a deep sill takes more coil and more bending time than simple flat trim.
• Height and access. Second story and dormer windows need ladders or staging, which adds labor.
• Wood condition. Wrap goes over sound wood only. If the trim is rotted, we replace it first, because sealing metal over mush just hides a problem that keeps growing.
• Doing it with other work. Wrapping during a siding or window project costs noticeably less per opening, since the crew and equipment are already on site.

What a Quality Installation Looks Like

Not all wraps are equal, and a bad one can trap water instead of shedding it. When you’re comparing quotes, ask about these details:

• Hemmed edges. Exposed cut aluminum looks sharp for a year and wavy after ten. Quality installers fold the edges for stiffness and a finished line.
• Water always sheds downhill. Upper pieces overlap lower pieces, the sill piece slopes away from the glass, and nothing creates a shelf where water can sit.
• Sealant in the right places only. Joints get high grade sealant, but weep paths stay open so any moisture that does get behind can escape.
• Tight, flat bends. Wavy, oil canned metal is the signature of rushed work. Good wrap looks like it grew there.

When a Wrap Isn’t the Answer

We’ll always tell you straight when wrapping is the wrong money. If the window itself is failing, with fogged glass, rotted sashes, or sticking frames, wrap the trim and you’ve put a nice frame on a bad picture. In that case you’re better served by new construction or replacement units, and our guide to window replacement in Pittsburgh lays out what that costs locally. Every replacement window we install through our window services gets wrapped or trimmed as part of the job, so you get the sealed, finished exterior automatically.

The same capping technique protects door frames, too. We wrap brickmould and jambs on most projects covered in our post on entry door installation, because a rotted door frame fails the same way a window sill does.

Frequently Asked Questions

Does window wrap cause rot underneath the aluminum?
Only when it’s installed badly over wood that was already wet or rotten. Done right, with sound wood, proper overlaps, and open weep paths, wrap prevents rot rather than causing it.

How long does aluminum window wrap last?
Plan on 20 to 30 years. The baked enamel finish resists fading and chalking for decades, and the aluminum itself essentially never wears out.

Can I wrap my own windows?
Honestly, this is one of the tougher DIY exterior jobs. The brake work takes practice, and a piece bent wrong channels water into the wall instead of away from it. Most homeowners who try end up with wavy metal and a call to a pro anyway.

Is window capping the same thing as a window wrap?
Yes. Capping, cladding, and wrapping are regional names for the same process: custom bent aluminum installed over exterior window trim.

Get a Free Wrap Assessment

If your trim is peeling again, or you’re planning siding or window work and want the whole exterior done right at once, we’d love to take a look. We’ll check the wood underneath, show you color options in person, and give you an honest number. Schedule your free inspection at mybellaroof.com, and let’s make repainting a thing of your past.