Best Types of Replacement windows

Best Replacement Windows

Deciding on the best replacement windows for your home

Experts say each type of replacement window has pros and cons, so choosing the best type for your home means juggling a number of considerations. For example, one of the least expensive choices, vinyl replacement windows, provides good insulation and requires no maintenance. However, they can't be painted, so you're stuck with the original color, and they may become less airtight over time as the material weathers.

Wood replacement windows have the most aesthetic appeal, but they also require the most maintenance and are the most expensive. Clad-wood windows have a layer of vinyl or aluminum on the exterior, so they don't need to be painted or stained like wood-framed windows do. Fiberglass windows provide great insulation and need no maintenance, but they are only available in a limited number of sizes and styles. Aluminum replacement windows are inexpensive, lightweight and strong, but aluminum is not a good insulator and is not suited to all climates.

Hybrids and composite replacement windows offer combinations of materials

In addition to the types of replacement windows discussed above, manufacturers also sell hybrid windows - that is, windows that combine different materials. Clad-wood windows are, in fact, hybrids, since they combine wood and either vinyl or aluminum. Another example is vinyl windows with wood veneers on the interior. Yet another combination is fiberglass and wood; fiberglass exteriors are bonded to wood interiors, as in Milgard's WoodClad line of fiberglass windows. The cautions that it may be hard to judge a hybrid's energy efficiency, so you should look for an Energy Star-qualified window or read the NFRC label carefully (the l does standardized testing for the window and door industry).

Windows made of a composite material are also becoming more popular, renovation professionals say. A new generation of composites combines wood and polymers to produce window frames that look like wood and have its thermal and structural properties, but are resistant to damage from moisture or insects. Some composites combine ground-up vinyl and sawdust or wood chips bound together by epoxy, for example. Composite windows cost more than vinyl, but less than wood. In addition, they are greener because they can be made with recycled vinyl and sawdust or wood scraps. Andersen's Renewal windows are a good example of this type of window; it's made of Fibrex, a wood/vinyl composite. According to Andersen's website, its Renewal line of windows has earned Green Seal certification ( is a non-profit organization that develops standards for sustainability and certifies products, services and companies that meet them).

Replacement windows or new-construction windows?

Replacement windows are designed to make use of the existing window frame and sill. A full window replacement is another option; as the name implies, these types of windows, also called new-construction windows, require that the existing framing be replaced. As noted by the Efficient Window Collaborative, new construction windows are a must if the existing window frame is either significantly out of square or has been compromised by insects, rot or other ravages of time. However, new construction windows are more expensive than replacement windows. Installation is more complicated as well - both interior and exterior walls will need to be opened - and hence considerably more costly.

The bottom line is that as long as your window frames are square and in good shape, replacement windows are a viable, logical and more economical solution in most cases. Their chief drawbacks are in the area of aesthetics. As noted by experts, since the whole window sits within the old frame, the glass area will be slightly reduced. Some might find the contrast between the old trim and the new window materials to be jarring as well.

Elsewhere in this Buyer's Guide:

Wood windows look terrific, but do their cons outweigh their pros?

Do clad-wood windows really represent the best of both worlds?

Vinyl windows get a bad rap for aesthetics, but our research reveals they can be the best choice for many homeowners.

Learn more about this increasingly popular replacement window choice.

Great durability, poor efficiency.

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