Our Exclusive Products

Home Improvement Products

We Have all products supplied by KV Custom Windows and Doors



Below are some of the available options and colors. (click image to view larger scale).


  • fixed
  • casement 
  • awning
  • single & double side sliders (tilt and pull out)
  • single & double hung 
  • endvent sliders 
  • basement
  • bay
  • bow


We carry steel door systems, although we can provide fiberglass doors in sales, we do not install them.  Please contact us for a brochure with many options.

Patio doors

Patio doors

Custom sizes available

Garden Doors

Garden Doors

Garden door system


Installing Windows and Doors in Durham Region

Windows & Doors installation/Sales

You can lower your heating and cooling costs by about 10% with energy-efficient windows and doors. Dowling & Sons Windows & Doors can retrofit windows to existing frames or install new frames for a snug fit and maximum energy efficiency.

Custom Alumnium

We specialize in custom aluminum work including garage doors, windows, enclosures, and much more. We also provide contractors with custom aluminum bent products for their job needs.

Shutters & Store front custom Shutters

We offer a wide variety of shutter styles in vinyl and aluminum options please contact us for further details.

Siliconing Residential & Commercial

We offer siliconing for residential and commercial applications, we are able to color match very closely and use a high quality sealant right for the job.

Installing Windows and Doors in Durham Region

Custom store front aluminum and shutters

We offer custom storefront aluminum work including custom-built shutters