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Windows in Oshawa
If you are considering replacement vinyl windows in Oshawa, it’s costing you money to wait. With rising energy costs, Energy Star vinyl windows and fiberglass doors from WELDA Windows and Doors actually pay for themselves.
We have many homeowners in Oshawa that have saved hundreds of dollars for first class work and service. WELDA Windows and Doors home improvement company that provides high quality, energy efficient windows & doors that will look good, increase your home`s security, and cut down on heat loss… saving you money.
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 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