Aluminum Window Replacement: A Guide for DFW Homes

In a lot of Plano, Richardson, Carrollton, and north Dallas neighborhoods built from the 1970s through the 1990s, you can still spot them from the street: thin silver or bronze-tone frames, horizontal sliders on the bedrooms, a metal single-hung over the kitchen sink. Aluminum was the standard residential window across a big share of North Texas for about three decades. A lot of those windows are still in the wall.

If you own one of those homes, you probably already know the windows are a problem. This guide is about the details: how to tell exactly what kind of aluminum windows you have, what is actually wrong with them, what to replace them with, and what the project involves. That way you can read a quote knowing what it should include.

The Short Answer

Original aluminum windows in a DFW home are almost always worth replacing, and they are almost always worth replacing as complete units. They do not have one problem. They have two that stack: a frame that conducts heat, and glass that was never built for a Texas summer. Repairs can get a sticking slider moving again. They cannot change either of those two things.

The decisions that matter are the new frame material, the glass package, and whether each opening gets a full frame or an insert installation. Those three choices, far more than the brand name on the quote, decide how the new windows perform.

How to Tell What You Have

“Aluminum windows” covers a wider range than most people expect. Before you get quotes, it is worth ten minutes with the windows open to figure out which kind you have.

Single pane or dual pane

Look at the edge of the glass. Dual-pane glass has a metal or dark spacer strip running around the edge between the two panes. Single-pane glass sits directly in a vinyl or rubber glazing channel with nothing between. Many earlier homes have single pane. Some later aluminum windows came with dual-pane glass, which is better, but it is early insulated glass, and those seals have now been aging for decades. If you see fog between the panes that will not wipe off, our guide to condensation between window panes explains what has happened.

Thermal break or no thermal break

A thermal break is an insulating strip that splits an aluminum frame into an inside piece and an outside piece so heat cannot move straight through the metal. Open the sash and look at the frame in cross-section at the sill or jamb. A thermally broken frame shows a plastic or rubber-like band separating the inside metal from the outside metal. If it is metal all the way through, there is no break.

A second test costs nothing and just takes a cold morning: touch the inside face of the frame. If it feels close to outdoor temperature, or it is beaded with water while the middle of the glass is dry, the frame is carrying cold straight into the room.

How it was installed

Most residential aluminum windows from this era were set into the wall with an integral nailing fin, and on a brick home the brick was then laid up around them. You cannot see the fin, but it matters: it means the frame is thinner and the usable pocket shallower than the opening suggests. Our guide on how to measure for replacement windows explains why many aluminum-window projects turn out to be full frame jobs once someone measures carefully.

What Actually Goes Wrong With Aluminum Windows

• The frame conducts heat. NFRC's consumer guide to metal window frames says aluminum “readily conducts heat, greatly raising the overall U-factor of a window unit.” In winter you see it as condensation, or even frost, on the inside of the frame. In summer you feel it as a warm frame on the sunny side of the house.
• The glass is the bigger summer problem. The same NFRC guide makes a point worth taking seriously: in hot climates, improving the frame can matter much less than using a higher-performance glazing system. Single-pane glass, or early dual-pane glass with no low-E coating, lets in far more solar heat than a modern glass package. That is the heat you feel in a west-facing bedroom at five o'clock in July.
• Slider hardware wears out. Horizontal aluminum sliders ride on small rollers in a metal track. After decades of grit, the rollers flatten, the track bends or corrodes, and the sash starts to drag, jump, or refuse to latch.
• Weatherstripping and glazing gaskets shrink. The fuzzy pile weatherstripping on sliders mats down, and the vinyl glazing channel holding the glass shrinks and cracks under years of UV. Both let air and dust move freely around the sash.
• The metal itself degrades. Bare aluminum oxidizes to a white, chalky surface, and finishes wear. Thin sash profiles bend, and a bent sash will not seal however well it is adjusted.

For the full list of warning signs across all window types, see signs you need new windows.

Repair, Film, or Replace?

It is fair to ask whether there is a cheaper fix, and for some problems there is. Rollers, pile weatherstripping, and latches can sometimes be replaced if you can still find parts. That can make sense if you are selling soon and need the windows to open and lock, or if the windows are in a garage or a room you barely heat and cool.

What repair cannot do is change the frame material or turn single pane into insulated glass. Solar control film faces the same limit. It can cut glare and some solar heat through the glass, but it does nothing for a metal frame bridging the wall. Our window repair vs. replacement guide and the comparison of window film vs. replacement windows cover both options honestly. For original aluminum windows, both usually point to replacement.

What to Replace Aluminum Windows With

Every common residential frame material is a big step up from an aluminum frame with no thermal break. That makes this choice less about performance than about budget, appearance, and how long you plan to stay in the house.

• Vinyl is the most common replacement in DFW. It needs little maintenance and is usually the budget-friendly choice.
• Composite, including Andersen's Fibrex material, and fiberglass cost more, and they are built to move less than vinyl through big temperature swings.
• Clad wood puts a real wood interior behind a protective exterior cladding. It is the right fit when interior millwork is part of the house's character.

Our vinyl vs. fiberglass comparison and the guide to windows for Texas heat go through the frame decision in detail.

Then give the glass at least as much attention. Since the original glass is the bigger summer problem, the new glass package is where your money does the most work. ENERGY STAR says windows must meet U-factor and, where applicable, SHGC requirements based on climate zone, and DFW sits in the South-Central zone. Both ratings appear on the NFRC label. Our ENERGY STAR windows guide explains how to read those numbers, and the double pane vs. triple pane comparison covers whether a third pane is worth it here.

Keeping the Look, or Changing It

Replacement is a chance to rethink how each window opens, not just what it is made of.

• Aluminum sliders can go back in as modern sliding or gliding windows, with current roller systems and weatherstripping that address the dragging and drafts.
• Aluminum single-hungs are commonly replaced with double-hung windows, whose tilt-in sashes make second-story glass cleanable from inside.
• Frame width changes. Aluminum profiles are thin, and most replacement frames are thicker. Ask to see the visible glass dimensions of the proposed window next to your current one, especially on small windows.
• Exterior color. If you like the dark-bronze look of the originals, ask which exterior colors the product line offers in your chosen frame material. Our black frame windows page covers the darker options.

Two cautions. Changing the size or operating style of a bedroom window can bring emergency escape requirements into play, so check with your city's permit office first. And if your neighborhood has an HOA, exterior color and grid changes often need approval; see HOA window replacement rules in Texas.

Full Frame or Insert on an Aluminum Window

This is the most important installation question for aluminum windows, and our full frame vs. insert replacement guide covers it in depth. The short version: an insert sets the new window inside the old frame, so the aluminum frame stays in the wall and keeps conducting heat around a brand-new window. A full frame replacement removes it, exposes the opening so any moisture damage can be found and repaired, and adds new flashing.

An insert into an aluminum frame is not automatically wrong. It still beats a failed single-pane window by a wide margin, and sometimes it is what the budget allows. But the aluminum stays in the wall, and the shallow pocket of a nail-fin frame limits what an insert can be set into. You should hear that tradeoff before you sign, not after install day.

What the Project Looks Like

On a typical aluminum-window home, each opening is handled one at a time: the old unit comes out, the opening is inspected for moisture damage and repaired where needed, the new window is set, the perimeter is insulated and sealed, and the trim is finished inside and out. On brick homes, the exterior detail against the masonry is routine work, but it is part of the scope, so it belongs on the quote. Our guide to replacing windows in a brick home explains why the brick stays in place and what that detail involves.

Our window installation process guide walks through the day-by-day sequence. For a real example, see our Plano whole-home window upgrade, where we replaced 14 original single-pane aluminum windows in a 1990s home near Legacy West with Andersen 400 Series double-hung windows.

Cost and Planning

We are not going to publish a number here that may not match your house. Cost depends on how many openings you have, the frame material and glass package you choose, and whether each opening is an insert or a full frame. Our window replacement cost guide and the DFW cost breakdown explain how those factors add up.

A few planning notes. Financing is available if doing the whole house at once is more than this year's budget allows. Plano homeowners with older homes should check whether they qualify for the City of Plano Great Update Rebate. Timing matters too; see the best time to replace windows in Texas. If you cannot do the whole house at once, start with the west- and south-facing windows. That is where old glass costs you the most.

How Bradley James Windows & Doors Approaches Aluminum Windows

We are a veteran-owned, owner-operated installer, and we do not use subcontractors. The person who assesses your windows is responsible for how they are installed. On the consultation, we look at each opening individually: whether the frame is thermally broken, how much pocket depth there is, what an insert would cost you in glass, and what is likely behind the trim given the age of the house. Sometimes that means full frame throughout, and sometimes it is a mix. Either way, the method goes on the quote in plain language.

We serve 24 cities across the metroplex, including Plano, Richardson, Carrollton, and Dallas, where original aluminum windows come up constantly. See all our service areas. We also offer first responder and military discounts. Browse the rest of our window and door guides, or request a free estimate, and we will start by looking at the windows you have.