Guaranteed lowest price in the industry
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* On order of $3000 or more
Windows in Newmarket
If you’re thinking about replacing your windows in Newmarket and do not have all the funds available to you right now, or you simply wish to defer your payment for a while, you can take advantage of our easy deferred or zero interest payment options. Many customers of WELDA Windows and Doors use our fast and friendly financing plans with good reason – they can help make your windows replacement project happen more quickly and with less hassle.
Over 35 Years of Experience
Servicing Homeowners Across the GTA
Energy Star Rated and Designed in Canada
50% of our business is from referrals
Over 40k Satisfied Customers
Peace of Mind with Lifetime Warranty
Satisfaction 100% guaranteed
Experience & Trust Our Quality does Not cost- it Pays!
Certified Professional Installers
Best In Class Glazing Technology
Super Saver Glass with Argon or Krypton Gas Filled.
Super Saver Technology
- Indur IG Insulating Double or Triple Glass for energy saving and solar control
- Industry lowest failure rate! Exceptional longevity and performance
- Lifetime Warranty with the best sound proofing and highest security against forced entry
- Engineered thermal insulation for outstanding thermal efficiency
- Lead free 100% virgin vinyl designed to last a lifetime and poses no health hazards
- Energy star most efficient window, CSA certified & NAFS tested


What people are saying about us
The benefits of working with us
We understand that there are many windows and doors companies in Newmarket to choose from. There are hundreds of them! So why choose us?

High Quality
Searching for high quality windows & doors? WELDA provides only high quality products designed to last for many years to come.

Fair Pricing
What is a fair price? WELDA Windows offers the best combination of price and value. Our prices are incredibly affordable.

Expert Installation
What`s more important than price or quality? Installation! Since 1984 more than 40,000 homeowners have chosen WELDA Windows.

Excellent Warranty
Homeowners should consider WELDA for the long list of warranty benefits assured with every product purchased and installed.
Windows
Everyone wants quality windows, but not everyone wants the same size or style. That’s why WELDA offers a full selection of styles that can accommodate any design need or architectural style. The only factor that won’t differ from style to style, or size to size is the quality.
- Vinyl Windows
- Hybrid Windows
- Casement & Awning Windows
- Bay, Bow & Garden Windows
- Slider Windows
- Hung Windows
- Fixed & Shaped Windows