Kehl Windows and Doors
Kehl Windows and Doors
When you buy from Kehl, you buy directly from the factory.

Frequently Asked Questions (with Answers!)

How do I measure my windows for a replacement?

When you're ready for a window replacement start by taking down your initial measurements. Use a tape measure to determine the width of the window from the inside of the window sill. Measure the opening at the top, the middle, and the bottom, and write down the smallest measurement you get. Remember, if your window is too large, it won’t fit in the opening. Do the same with the height, measuring the middle and along each side, then write down the smallest number.

How do I know when I need new windows?
There are many reasons why people choose to replace their windows. Here are some simple examples of why now might be the right time to replace your windows:

  • You spend time in the fall sealing your windows with plastic and tape to keep drafts out.
  • There is noticeable mold on your wooden window frames and sashes.
  • Your windows are hard to open and close, or permanently painted shut making it difficult for you and your family to get out of your house in an emergency.
  • You have windows with broken hardware that you can’t operate.
  • You feel drafts around your windows even when they are closed.
  • You’re cold in the winter or hot in the summer when you’re sitting near your windows.
  • Your windows have only one pane of glass.
  • Your windows have two panes of glass, but there is moisture or dirt between the panes.
  • You have water leaking into your home or into the wall cavity, creating a mess when there is rain or snow.
  • You’re losing heat in the winter and cool air in the summer because of inefficient windows.
  • Your heating and cooling bills are too high.
  • You hear excessive outside noise when your windows are closed.
Can I install my own windows instead of hiring a professional?

We urge homeowners to know that window installments are not always simple and fast “do-it-yourself” type of projects. The precision and expertise required in installing a window is crucial in the care for the materials purchased. Window parts may suffer damage or become modified, which can lead to repairs or replacements from being installed imprecisely. Also, the measuring tools involved in the window installation process are not common to household tool boxes and must be operated by a trained professional for best results.

What causes condensation on my windows?
Common situations that cause temporary window condensation:

  • Construction or remodeling.
  • Building materials such as wood, plaster, concrete and paint produce a great deal of moisture. As these materials “stabilize,” they release less moisture into the air.
  • Changing seasons. Your house absorbs moisture throughout each humid summer. The first few weeks of heating your home at the beginning of a cold season may cause temporary window condensation. This moisture will dry out after a few weeks, and you should have less condensation.
  • Quick changes in temperature. Sharp drops in temperature can create temporary condensation during the cold seasons when inside heating is used.
What is Low E?
Low-emission glass (Low-E) is a clear glass, it has a microscopically-thin coating of metal oxide. This allows the sun's heat and light to pass through the glass into the building, while blocking heat from leaving the room. This reduces heat loss considerably.
What is Argon?

Argon is an inert, non-toxic gas used in insulating glass units to reduce heat transfer.

What are the benefits of an energy efficient window?
Take comfort in the reduction of cold drafts and a warmer feeling house in the winter and cooler interior in the summer.
  • Interior surfaces of energy-efficient windows stay warmer reducing the potential for condensation on your windows.
  • You save money! An older home can lose up to 50 percent of its energy heat through leaky, drafty windows and doors. Reducing heat loss can translate to noticeable savings on your heating bills.
Can I renovate my windows and doors in the winter?

Certainly. You can enjoy the immediate benefits of improving your home’s appearance and efficiency any time of the year. If you are experiencing heat loss through your windows and doors, do not wait to increase your home’s comfort level and improve its thermal performance.

How do vinyl windows compare with windows made from other materials, such as wood and aluminum?

Vinyl is today’s most popular choice for window material. The maintenance-free and energy efficient benefits of vinyl are second to none. Since the mid 90s, however,the popularity of vinyl has skyrocketed due to the cosmetic and design enhancements that have been added to vinyl products to distance them from the other composite choices.

What is the difference between a “right hand door” and a “left hand door”?
Determining which type of door you need is part of the consultation and installation service we offer at Kehl Window and Door. To determine which type of door you have, stand outside and look at the closed door.


If door swings out:
Handle on Right = Left Hand Door
Handle on Left = Right Hand Door


If door swings in:
Handle on Right = Left Hand Door

Handle on Left = Right Hand Door
Do you charge for estimates?
An estimate from us does not cost a thing!


We understand what it can be like getting "cold feet" when thinking of a window or door replacement. Our job is to provide you with all that you need to know, in order to equip you with all the necessary knowledge in helping you make a sound decision. Regardless of whether or not you choose to engage renovations with us, we see it as our duty to inform you as best we can with the matters in which we specialize: windows and doors – so ask away!
Click Here To Schedule A Free Estimate!
What kind of warranty do you have?
Kehl Window Systems warrants to the original purchaser of its vinyl window(s) that our installed products will be free from defects in material and workmanship for as long as you own your home.


Our lifetime warranty will transfer to the next owner of this home provided Kehl is notified in writing within 30 days of the property transfer date.

At Kehl, we are the manufacturer and certified installer. Everything in your project is covered by our warranty, even glass breakage! HOW can Kehl offer this in their warranty? Because we make it here, locally, in Harrow, Ontario.