Windows Calgary

Old West Windows & Doors is one of Calgary's leading window installation and replacement companies. Serving Calgary, Airdrie, Okotoks and surrounding areas for 20 years.

What to Expect with Your Windows and Doors Installation



Replacing Windows Procedure

Many of our clients here at Old West Windows & Doors ask us what to expect when they are replacing their residential windows or doors.We compiled an installation procedure to help you understand the process.

The process really begins with the first phone call. We setup a time to come to your home and discuss your needs and how our services can help. We discuss price ranges and products and once we feel we’ve gotten to know your needs we will quote an installation job.

Once you have decided on the product and received a quote from us we schedule a time with you to complete the installation.

From there the procedure looks like this:

Window Door Installation Process

1. Site Setup

The first step involves setting up the work area. Drop cloth floor coverings, cloth running tracks, plastic polly coverings and plywood hardwood floor coverings are used to protect the area from materials and debris. We provide all the materials needed.

2. Removing Interior Trim

Next, the existing interior trim is carefully removed and drywall is cut back to the original framing. This is so that the area can properly be insulated with maximum high performance expanding foam, adding insulation value, saving heating costs for you down the road.

3. Removing Exterior Trim & Window Removal

Similarly to step 2, only on the exterior of the home, trim is removed or cut back of existing stucco or siding so the window can be cleanly removed.
The window frame is then carefully removed.

4. Cleaning

The third step involves thoroughly cleaning and inspecting the window cavity. The rough opening is cleaned and any foreign debris is removed. An inspection takes place to check for any tarnish, rot, mold, or other signs of affect to the area. Homeowners are notified if any of the above exists and steps are taken to fix any deterioration.

5. Caulking

A complete silicone caulking bed is applied against the exterior sheathing where the nail flange or brick mold meet, to create a tight seal once the window is installed. (A flange is a funny word for the lip that is created to allow for a product to be adhered or fit to another). Flange installation means the window product is installed and attached directly to the structure of the home.

6. Installation

The new windows are installed with all necessary levelling and shimming, leaving approximately 3/8’ to 1’ of space around the entire window for insulation purposes. The space left depends on the levelling of the new window against the existing rough opening.

7. Window Attachment

All window flanges or brick moulds are screwed in approximately every 6-10” around the entire window. This allows for expansion and contraction of the product over the seasons and years, without compromising the integrity and durability of the product.

8. Finishing

Interior Finishing


  1. The entire cavity between the nailing flange and drywall is filled with two separate applications of Low Expansion High Performance foam. This allows for more accurate cavity filling.
  2. The chosen interior trim is installed to all four sides of the window with a finishing nailer. Nail holes are filled and mitres are glued and sanded. This process minimizes any separation of the window to the trim, due to expansion and contraction causes be weather fluctuations. A second application of fill and light sanding is recommended before painting.
  3. An interior dap caulking is applied where necessary, where the trim meats the window frame, for a stronger/tighter seal.
  4. Glass is cleaned with “Spray Way” glass cleaner. Jams are cleaned with vinyl cleaner.
  5. The entire indoor work area is then vacuumed and cleaned.

Exterior Finishing

Window Installation Procedure


  1. All needed drip caps/L-J channels are applied. (They prevent moisture from collecting around the window). All windows receive new upper drip flashes to match the exterior finish of the home.
  2. Wood build ups are applied around nail flanges for stronger aluminum clad finish.
  3. Selected clad coloured finish is installed around all four sides of the window. A tighter cleaner look is created by ensuring the finish is nail hidden and screw-free, as well as folded in mitres.
  4. Rubber based silicone caulking is applied where needed – between clad finish and window, and on the exterior finish against stucco/siding. All caulking is applied by a pneumatic air caulking gun for smoother more consistent beads.
  5. Glass is cleaned with “Spray Way” glass cleaner. As well as cleaning of all vinyl and aluminum.
  6. Complete cleaning of exterior area under and around the window is complete. Any debris is removed.

Helpful Recommendations for Homeowners


  • If you are planning to keep or reuse your existing blinds, it is helpful to take them down prior to installation if possible.
  • Try to leave a reasonable work area inside and outside the house where the windows are being installed.
  • Remove or take down and valued items that may be disturbed during the installation process.
  • Please inform installation company of any alarm or security systems you may have and notify your security company that an installation is scheduled to take place. Any recommenced procedures for working with security systems can be adhered to within reason.

If you have any additional question about the window installation procedure please contact us. We would be happy to answer them.

Contact Old West Windows & Doors Calgary

Contact Us Now!

CALL US TODAY (403) 262-3933


Old West Windows & Doors is one of Calgary's top rated windows and doors installation companies. Our industry leading 12-year installation guarantee will ensure you will enjoy your beautiful new windows and doors for years.


All our installations come with the manufacturer’s product warranty and our own 12-year installation warranty. Old West windows and doors stand the test of time.


Old West Windows & Doors is owned and managed by Rick Whatley and son Cory Whatley. Serving Calgary, Airdrie, Okotoks and surrounding areas for 20 years.


We are not happy until you are happy. If you are not 100% satisfied with our work, please call us and we'll make it right.