Frequently Asked Window Questions

Replacement Windows

Who should I buy windows from?
A consumer should select a window company who sells energy efficient products, has a reputation for service and stability, and provides a warranty on the unit. We recommend that you buy from a company with a commitment to participating in the National Fenestration Rating Council (NFRC) certification and labeling process and in the ENERGY STAR® Windows program.

Many companies will also participate in the American Architectural Manufacturers Association (AAMA) and will have a permanent label on the product indicating their participation. Membership in all of these organizations is an indication that you are dealing with a manufacturer who cares about the quality of their product and the product's energy efficiency.

Why are my windows drafty and will new windows stop the draft?
Drafty windows and air infiltration could have several causes. Improper installation is often the culprit but not always. If the windows were improperly installed, the defects can normally be corrected without removing or replacing the window.

Proper caulking and flashing should prevent perimeter air leakage. However, if the installation twists or racks the window frame causing the sash weatherstrip not to be able to seal the sash to the frame, removal of the window to correct the problem may be necessary. You can determine whether the air is coming in at the joint between the frame and the house or the joint between the sash and the frame. Hold a lighted candle or lighter in front of each joint when the wind is blowing and slowly move it along the joint. If the flame flickers strongly or goes out, the joint is probably leaking.

If the leak is between the frame and the sash and the window has been installed square, plumb, level and is not twisted or racked, the problem may be construction of the window or window design. If your windows are not efficient in your climate and particularly if it does not have insulated glazing, the air may not be leakage but simply cold room air flowing down the surface of the window.

As the window surface becomes colder, it cools the room air next to it. This cooled room air is then heavier than the warmer room air further into the room. Because the cooled room air is heavier it sinks toward the floor and is replaced by warmer room air, which is then cooled. This process can result in noticeable air flow but it is not air leakage from the outside. Replacement of the window by an energy efficient window is the solution here.

Will new windows eliminate condensation?
Condensation is a direct result of interior humidity and the difference between indoor and outside air temperature. If you keep the humidity in your house low, then the likelihood of experiencing condensation is also low. However, the efficiency of your window will also impact the temperature and humidity level at which condensation occurs. Energy efficient windows will help reduce condensation.

Here's why: high performance windows with low U-factors result in inside glass surface temperatures much closer to the room air temperature. Windows with warm edge technologies and non-metal frames are also less likely to have condensation on the frame or at the edge of the glass.

Insulated "superwindows" with three or more layers will virtually eliminate condensation on the interior surface of the glass -- even under extreme cold weather conditions. Note that in certain conditions (humid mornings after a clear night sky), some superwindows may have dew on their outside surface. These windows are such good insulators, the dew is condensing there just like it does on an insulated wall.

What should I look for when selecting a product?
Choose a company with a proven track record and good references. Make sure you are getting a high quality product and certified installers.

What's the best way to evaluate a window's energy performance?
The easiest way to compare energy performance of different windows and doors is to read the National Fenestration Rating Council (NFRC) label. It provides valuable efficiency information about the product including the u-value, solar heat gain and visible light transmittance values. Also check to see if the product is ENERGY STAR® approved.

Cleaners to remove stains from vinyl window and door frames

1. Bubble Gum: Fantastik®, Murphy Oil Soap®, Solution of vinegar(30%), Water(70%), Windex®
2. Crayon: Lestoil® DAP (Oil-Based Caulk) Fantastik®
3. Felt Tip Pen: Fantastik®, water-based cleaners
4. Grass: Fantastik®, Lysol®, Murphy Oil Soap®, Windex®
5. Lipstick: Fantastik®, Murphy Oil Soap®
6. Grease: Fantastik®, Lestoil®, Murphy Oil Soap®, Windex®
7. Mold and Mildew: Fantastik®, Solution of vinegar(30%), Water(70%), Windex®
8. Motor Oil: Fantastik®, Lysol®, Murphy Oil Soap®, Windex® Oil Soft Scrub®
9. Paint: Brillo® Pad,Soft Scrub®
10. Pencil: Soft Scrub®
11. Rust: Fantastik®, Murphy Oil Soap®, Windex®
12. Tar: Soft Scrub®
13. Top Soil: Fantastik®, Lestoil®, Murphy Oil Soap®

*Cleaning Materials are listed in alphabetical Order. Hansons does not endorse proprietary products or processes and makes no warranties for the products referenced herein. References to proprietary names is for illustrative purposes only, and is not intended to imply that there are not equally effective alternatives. All cleaners used must be thoroughly rinsed off and dried after use or discoloration of vinyl frames could occur.

How do I clean my window frames?
Keeping your windows and doors clean means more than just the glass. Here are some helpful tips for cleaning your window and door frames effectively without damaging them. Vacuum dirt from sill and track areas before washing.

1. Clean window and door frames with a mixture of mild dish soap and water.
2. Abrasive or caustic cleaners or solvents are never recommended because they might cause permanent damage to the frame finish.
3. Mild, nonabrasive soaps* are usually safest for most dirt and stain removal.
4. Always rinse completely with clear water and wipe dry.
5. Check to make certain that drainage or "weep" holes are always clear of dirt or obstructions - both inside and outside the window or door in the bottom of the frame.
6. Note: If the window is "stacked," there may be weep holes between units. *Ivory® is an example of a mild dish soap. Always test cleaners in an inconspicuous area first.

How do I care for my window glass?
Glass care today is more important than ever. Insulating, low-e or heat reflective glass requires proper maintenance to ensure their complete effectiveness.

1. Never use any petroleum-based cleaners, or caustic chemicals on your glass.
2. Never use a razor blade, putty knife or abrasive pad to clean the glass.
3. Do not use a high-pressure spray nozzle when rinsing your windows after washing.
4. ll of these practices may damage the glass surface, the insulating glass seal, or component parts.
5. Clean glass with a mixture of mild dish soap* and water. Rinse completely with clear water, then wipe dry with a soft cloth to avoid water spots.
6. Avoid washing glass in direct sunlight.
7. Abrasive or caustic cleaners are never recommended because they might cause permanent damage to the finish or the glass.
8. Clean screens by first removing, then washing on a flat, clean surface with mild soap and water and a soft brush. Rinse, wipe dry and reinstall.

What is condensation and mold?
Window condensation can be a natural occurrence. It can be a warning that excessive moisture is present and may cause structural deterioration and the possibility of mold growth.

Condensation on the inside of a window is a result of a higher air moisture content contacting lower temperatures on the glass. The higher the interior humidity and the lower the outside window temperature, the more condensation can occur.

Excessive interior humidity can lead to structural damage and health concerns if high moisture levels are sustained inside wall cavities. Wood rot, mold and mildew can result. To prevent these problems:

1. Check all sash for smooth adequate operation.
2. Add integrated window ventilators and air exchange devices if necessary.
3. Regularly use exhaust fans especially when showering.
4. Install and use a dehumidifier.
5. Use ceiling fans to circulate air.
6. Open windows and doors whenever practical or possible to allow interior moisture to escape.

How long will a window last?
Most of today's windows are made from a frame material and an insulating glass "sandwich"-each component subject to wear, weathering, and potential failure. Weatherstripping in the frame and moving parts can wear out with use. An insulating glass panel may suffer a broken seal after years of expansion and contraction with temperature changes-creating a "fogged" look as moisture accumulates between the glass panels. According to the National Institute of Standards and Technology (NIST), some windows can last up to 50 years. Some of the factors that go into the determination include:

1. Frame material
2. Quality construction practices and building style
3. Product quality
4. Climate and exposure
5. Routine care and maintenance
6. Replacement of parts that wear with use with an AAMA Certified product that's cared for, you can expect to increase the service life.

What is ENERGY STAR®?
ENERGY STAR is an independent U.S. government program establishing a standard set of guidelines to recognize the energy efficiency of various products. ENERGY STAR guidelines are used in conjunction with a variety of building materials, including windows and patio doors. Over the past 10 years, ENERGY STAR guidelines have helped double the efficiency of windows they endorse.

What is Low-Emmisivity (Low-E) glass?
Low-e glass is manufactured by depositing a microscopically thin, transparent metal or metallic oxide layer on the glass. Low-e coatings reduce radiant heat loss, and can reduce the passage of UV rays. Use of heat-resistant (or absorbing) glass began in the 1950s, as did the use of reflective (or mirror) glass.

What is the National Fenestration Rating Council (NFRC)?
The NFRC is an independent, third-party certification organization with industry-accepted standards for evaluating and certifying energy performance. The NFRC Certificate contains U-factor, SHGC (Solar Heat Gain Coefficient) and VT (Visible Transmittance) values. These values form the basis for the ENERGY STAR® Door and Window Program.

What is R-Value?
Refers to a window's resistance to thermal transfer or heat flow. The higher the value, the better the insulation.