Frequently Asked Questions

We hope you find these answers to the most frequently asked questions helpful. We invite and encourage you to contact us with any other questions you may have. We look forward to assisting you!

Q: What is Low E?

Low E (low emissivity) coatings control the transfer of heat through windows with insulated glazing. Applied on glazing or glass, Low-E coatings typically cost about 10-15% more than standard windows. However, they reduce energy loss by as much as 30-50%.

Microscopically thin, a Low-E coating is virtually invisible. Composed of a metal or metallic oxide layer, it’s deposited directly on the glass pane surface(s), reducing infrared radiation, therefore lowering the temperature of the glass resulting in a lower U-factor for the window. Different types of Low-E coatings have been developed for varying degrees of solar gain (high, moderate or low). Low-E coatings also reduce a window’s visible transmittance unless a spectrally selective coating is selected.

In hot climates, homes with east and west-facing windows and unshaded south-facing windows, Low-E coating should be applied to the outside pane of glass. However, cold climate homes with windows designed to retain heat energy during winter months should apply Low-E coating to the inside panes. Low-E coatings are applied in either soft or hard coats. Soft Low-E coatings degrade when exposed to air and moisture. They’re easily damaged and don’t last long. Therefore, manufacturers restrict their application to insulated multiple-pane windows. For a more durable solution, Hard Low-E coatings can be used in add-on (retrofit) applications.

Q: What is Argon/Krypton and why is it used?

By filling the space between layers of glass with a less conductive and more viscous slow-moving gas you minimize the convection currents within these spaces, which results in a reduced transfer of heat between the inside and outside.

The introduction of argon and krypton gas fills by manufacturers looking to improve window efficiency resulted in a measurable improvement in thermal performance. Inexpensive, nontoxic, nonreactive, clear and odorless, argon has proven to be a perfect gas fill. The optimal spacing for argon is about the same as for air (1/2 inch or 11-13 mm).
Krypton is also nontoxic, non-reactive, clear and odorless, yet offers even better thermal performance…at a greater cost to produce. Krypton is preferred for glazing spaces that are thinner than normal, such as ¼ inch (6mm). The optimum gap width for krypton is 3/8” (9mm). To maintain a comfortable price point without compromising thermal performance, a mixture of krypton and argon gases is sometimes used.

Q: What is partial or full capping?

Most homes have exterior window trim that is made of wood, which can cause a series of issues, including rotting, peeling and cracking as the elements take their toll. Wood requires maintenance in the form of prepping and painting every few years. Custom Window PLUS can eliminate the need for ongoing maintenance by wrapping the wood with aluminum and sealing it from the elements, creating a long-lasting beautiful trim that’s maintenance free.

Q: What colors (other than white) are available?

There are many optional colors from which to choose. You can click here to see available color options on the windows page of this website. You may also ask our sales representative for available color samples at the time of your FREE estimate consultation.

Q: Do the windows tilt in for easy cleaning?

Absolutely! Our innovative tilt-on-command feature makes cleaning your Custom Window PLUS windows a simple, easy task. The dual cam lock ensures a weather-tight seal as well as added security. Your Custom Window PLUS representative will be happy to provide information on the proper method for tilting your windows for easy cleaning.

Q: Do the windows come with screens?

Yes, our windows come standard with ½” screens that move up and down to accommodate whatever part of the window you’re opening. Full screens are available for a nominal fee.

Q: Are the windows installed from the outside or the inside?

Typically, windows are installed from the inside. They’re installed one at a time. During installation, windows are out for only 3 to 4 minutes, so cold and inclement weather isn’t an issue.

When it comes to replacement windows and doors,
Wisconsin calls Custom Windows Plus. Call today for your free estimate

800-689-6143