Inline Fiberglass

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8

What we do

Inline Fiberglass is the world leader in the development, design and application of High Performance Energy Efficient Windows. Inline is the world’s largest all fiberglass window manufacturer with the largest line of products. Inline offers unparalleled value with high quality construction for both the residential and commercial market. The story of Inline is more than a business success story. It is a shining example of a business that operates by integrity, values and forward thinking that remain at the core of the company's very existence.

Inline’s leading product, thin walled fiberglass lineals are used in a myriad of applications. As a fully integrated manufacturing operation, Inline designs and pultrudes in-house standard and custom lineals.

With its headquarters and main production facilities located in Toronto, Canada, Inline profiles, windows, doors and production equipment are sold around the world. Inline Fiberglass conducts rigorous testing at its own state-of-the-art facility to ensure the highest quality, performance, energy efficiency and compliance to various standards and specifications.

Join the Inline Fiberglass Community and have your questions answers by our Windows and Doors experts. Click here to contact us.


Our Commitment to Excellence

Inline Fiberglass is proud to partner with industry-leading organizations to promote energy efficiency and sustainable design.

Lunch and Learn Seminars

Customer Reviews


Inline wins Best of Houzz 2016 Award

5 February, 2016

Starting the year off as a winner. We are proud to say that we've won the Best of Houzz 2016 award in service. Feel free to check out our page at Houzz by clicking on the badge below.

Hardware Changes at Inline

20 August, 2014

Inline has recently changed its casement hardware along with its patio doors. Due to increase demand for larger casement sizes and performance, Inline has changed over to Truth’s 2 bar hinge.
Inline has also introduced new patio door handles in its 5 standard colours along with 3 Euro style handles. The new handles are sleek and contemporary that not only improve the aesthetics but adds an additional locking mechanism to prevent forced entry. Please click here for more information.
Please contact for more information.

Inline remains Top of the Class

10 April, 2014

For the fourth consecutive year, Inline Fiberglass Ltd is proud to announce that it has once again made Window and Doors Magazine Top 100 Manufacturers List. Again, Inline remained the only all fiberglass manufacturer to make this exclusive list of manufacturers. This prestigious designation is awarded to only the biggest and best manufacturers of fenestration products.

Inline Featured in DWM Magazine

3 April, 2014

In the latest release of Door and Window Magazine(DWM), Inline is featured in an in depth article. This article gives readers a sense of who we are, what we do and where we are heading. The article can be found on page 33 & 34. If you are looking for a real insight of Inline, please click here: