General FAQs

What are the major benefits of vinyl windows over windows made from other materials?

Vinyl windows are very efficient when it comes to thermal performance and air infiltration ratings.  Vinyl windows are custom manufactured and also custom designed to perform well in the geographic area where you live.  The PVC profiles are virtually maintenance free and have a long life expectancy.

What is the difference between mechanical and welded products?

Mechanical window frames and sashes are fastened at each corner by the use of screws or other type fasteners.  Welded window corners are heated and fusion welded together. Both mechanical and welded applications are accepted joinery methods for vinyl product fabrication.

How can I choose the right dealer/contractor?

When choosing a contractor, it is important to consider the following: the length of time a contractor has been in business, valid licensing and insurance, references and warranties offered by the contractor regarding work performed and the price. It is always helpful to have multiple quotes when making a major purchase.

Can you make a window to fit unusual shapes?

Lockheed Window Corp. offers many custom sized styles and geometric shapes to accommodate any opening in new homes and existing homes.

What is ENERGY STAR®? How does an ENERGY STAR® window differ from other windows?

ENERGY STAR® is a joint program of the U.S. Environmental Protection Agency and the U.S. department of Energy helping us all save money and protect the environment through energy efficient products and practices. It is a voluntary labeling program designed to identify and promote energy-efficient products to reduce greenhouse gas emissions. Windows labeled with ENERGY STAR® meet a stringent energy efficiency specification set by the Dept. of Energy and have been tested and certified by the National Fenestration Rating Council (NFRC).

I understand that the NFRC label on a window is a comparison between window manufacturers but I was confused when I looked at the label. Can you explain the significance of the NFRC label?

ENERGY STAR® labeled windows are tested and certified by the National Fenestration Rating Council (NFRC). NFRC is an independent third-party certification agency that tests products and assigns specific energy efficiency measures such as the U-factor (U-value) and Solar Heat Gain Coefficient to the complete window system. The NFRC label is designed to show the buyer of windows and doors how that product performs during the testing by NFRC. The U-value shows how much energy (heat or cool air) is lost during testing (extreme weather conditions are applied to window).  The lower the number indicates better performance, or the amount of energy lost under the extreme conditions.  The SHGC stands for “solar heat gain coefficient” which is a value given to how much heat gain comes through the product during testing.  This is particularly important in the southern United States.  The VLT stands for the “visible light transmittance”. This is a concern especially when tinted glass is used to control the SHGC.  Please refer to our “ENERGY STAR®" literature (Form 100) located in the Homeowner links/resource tab for the values associated with our products.

What is the advantage to using LowE glass?

Low emissivity glass provides superior U-values, which rates how energy efficient the unit is. When the glass is manufactured, there is a metallic finish applied to the glass either during or after the molten glass stage.  This metallic finish will actually reflect radiant heat back in the direction that it is coming from. During the winter months, it will reflect heat back into the home. In the summer months, it will reflect heat back outside.  Buying windows with LowE glass is not only a great idea, but is required by code in most areas of the United States today. U-values will vary for different model and style vinyl products.

My windows have been delivered but not installed yet – how should I store them until installation?

Windows and doors must be properly stored to ensure that they are protected until they are installed. Never stack or lean vinyl units against each other in the sun as the insulated glass can generate excessive heat buildup.  Windows and doors should be stored in a clean well ventilated area, elevated off the ground, out of direct sunlight and away from a heavy traffic area to prevent damage. Remove shrink wrap immediately so the individual units are exposed to circulating air. You may loosely cover them to protect the individual units.  Units with nailing fins should have their corners blocked and protected to prevent damage to the nail fin.

What do I use to clean my windows?

Vinyl may be cleaned with mild soap and water. Do not use any solvents, acids, or abrasives on the vinyl. To clean the glass, use a soft, clean, grit-free cloth and mild soap or detergent. Remove liquid by wiping dry or using a clean squeegee. Keep weather-stripping, hardware and window tracks clear of debris and dirt. Keep weep holes (if applicable) open and clear of obstructions.

How do I clean my windows using the tilt-in feature?

Please refer to the Technical Resources area of our website and download the “Operating Instructions” literature. This literature gives detailed instructions on how to tilt-in sashes for cleaning and remove screens.

What is condensation and what can I do to prevent it?

Condensation comes from the moisture in the air, and is caused by too much moisture (humidity) in the air for a certain temperature. To help reduce condensation, you must reduce the humidity in your home. Some of the ways to reduce condensation are: ensure proper ventilation for clothes dryers, bathrooms and kitchens, installing a dehumidifier, and ventilating your attic or basement. Condensation may appear on your new windows if sources of excess moisture, such as those listed above, are not properly ventilated.

How do I get my warranted window fixed?

Depending on the type of window and the year it was manufactured, there may be a charge associated with the replacement parts.  Please contact our Customer Service Department regarding the warranty on your window if you are not sure The specific window information label is located in the inside top of the master frame.  If the window is not installed, the information is on the label attached to the plastic window wrap. The information will be printed on a white or yellow label.  Listed in the homeowner resource tab of our website is the warranty request form.  Print this form and complete the questions using the information from the label.  The form must be mailed to Lockheed Window Corp., P.O. Box 166, Pascoag, RI 02859 with the shipping charge attached (check, money order) or you may pick the warranted parts up at our plant located at Route 100, Pascoag, RI.