PART 1: RETROFITTING - GETTING TO KNOW THE PROCESS

When you talk about getting new windows, the prevailing idea is that you have to remove all of your old window to make way for a replacement. However, this isn’t always the case, thanks to retrofitting, the process of installing window inserts. Since it doesn’t require that the original window frame be removed or replaced, it’s often a more cost-effective and quicker alternative to total window replacement. Homeowners are always free to choose using either inserts or full-frame window replacements but the former is generally reserved for upgrading older windows while the former are recommended for repairing damage and carrying out major renovations.

REASONS TO RETROFIT

Weather Protection

Older homes typically have windows that have not been reinforced or even rated for wind and impact resistance. Retrofitting your home with the newer, more modern windows in the market today is necessary if you want to protect your home from damage caused not just by severe weather but the usual wear and tear as well associated with day-to-day exposure. Don’t forget to make sure that the replacement windows you choose are rated to meet specific weather requirements in your area.

PART 1: RETROFITTING - GETTING TO KNOW THE PROCESS

Energy Efficiency

Another reason why homeowners should consider retrofitting is to boost energy performance in their homes. Windows affect energy efficiency so the state they are in can influence just how much energy your home will be consuming. To help you make smarter use of energy, energy-efficient windows employ a variety of technologies such as multiple glazing, insulated frames, spacers, and low-e coating that help control indoor temperature in your home. Making the switch from single- to double-pane windows, or from standard window glass to low-emissivity glass can significantly reduce your utility costs by keeping cooling and heating requirements in your stable.

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In the last ten years alone, windows have substantially improved through constant advancements made possible by modern technology. Take advantage of these improvements by choosing the right replcement for your home. Learn more in Part 2!

PART 2: CHOOSING THE RIGHT WINDOW FOR A RETROFIT

The success of your window retrofit largely relies on the window insert you choose. To reap all the benefits your new windows can give you, you have to make sure that you’re picking out the right one for your home, taking into consideration both form and function to address all your needs.

GRADE

The grade of the window is the measure the structural capability of its materials. Basically, it translates to how well your window can stand against wind and impact. Even with the best features and technology, choosing a window of the wrong grade can lead to problems that you ware aiming to avoid in the first place, like physical damage and leaks. As window requirements vary from area to area, make sure that you factor in what would be suitable for your home. Work with a local contractor and check that your window’s design pressure (DP) rating is right. Generally, the higher the DP rating, the better a window can resist wind and impact and window grade should be higher than the average wind load in your area.

MATERIAL

Both retrofitting and total window replacement have their merits, but the one thing that puts them on equal footing is the materials used in the installation. Although retrofitting is said to be less efficient than completely replacing the window, a retrofit with the right materials have been proven to perform just as well. Some of your options include:

PART 2: CHOOSING THE RIGHT WINDOW FOR A RETROFIT

Low-E Glass. Has a microscopically thin, transparent coating of metal or metallic oxide applied either to its interior face or between the panes. This coating acts as a barrier to reflect heat back to its source, whether it’s indoor heating or solar heat gain, keeping indoor heat in and outdoor heat out without impeding how much natural light a window lets through.

Spacer. A piece of material separating the panes of glass and affects how much heat is transmitted between multi-pane windows.

Gas Fills. Typically argon, krypton, or xenon, they are often used between the panes to further stunt heat transfer as they are less conductive than air.

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Sold on getting a retrofit? Make sure your window replacement project is a success by avoiding common mistakes associated with the retrofitting process. Learn more in Part 3!

PART 3: RETROFITTING MISTAKES TO AVOID

Don’t let your good intentions, time, and money go to waste by avoiding these retrofitting mistakes:

Window insert too large for rough opening

There needs to be adequate space between an insert and the rough opening or the old frame to make way for seasonal expansion and contraction. Without enough space, distortion or warping will be unavoidable, causing components to fail which can result in water leaking into your home. The width, height, and depth of the opening must be measured carefully, with the replacement window sized slightly smaller to make sure it can be operated smoothly.

Inadequate frame support

Proper, level support must be provided to the frame, especially across the bottom to avoid sagging and air leakage. Failing to support the retrofit frame properly, particularly across the bottom, can cause the insert to contort and allow the sill to sag. This will result in rough sash operation, incomplete closure, air and water leakage around the sash, and, in the worst cases, perimeter caulk failure and damage to the insulated glass seal. Leveling the bottom and plumbing the sides of the opening should be done to evenly distribute the pressure across the frame.

PART 3: RETROFITTING MISTAKES TO AVOID

Damaged moisture barrier

When removing an existing window, exterior siding might have to be cut to expose the nailing fin, resulting in the moisture barrier being cut as well. The moisture barrier will need to be resealed after a retrofit, with new flashing installed around the rough opening and elastomeric sealant used to keep moisture out.

Overpacked insulation

Packing the insulation too tightly around the window will apply unnecessary pressure on the frame and cause it to distort and disrupt operation of the window. Maintain some room between mineral fiber insulation and the window frame to avoid this.

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Anyone can benefit from from replacing their windows but not all will find a full-frame replacement practical. Fortunately, retrofitting is an option that homeowners can explore. Work with a reputable contractor and you’ll make the most out of your retrofitting project.

Renewal by Andersen of Cape Cod

3 Colonel Drive Bourne, MA 02532

508-936-1171

MyFlawlessWindow.com