Fiberglass material resists swelling, rotting, and warping making it the perfect choice for long-lasting durability coupled with exceptional beauty. Our Fiberglass frames are as strong as low carbon steel and 8x stronger than vinyl. Due to our unsurpassed engineering capability, Inline has developed the most advanced pultrusion technology. This technical advantage allows us to produce our lineals/frames with a higher glass loading then traditional fiberglass frames. This higher glass loading provides a higher strength and a lower thermal expansion rate. In climates with fluctuating temperatures this benefit keeps the window stable and weather tight, reducing the risk of seal failures and air leakage into your home. Simply put our frames are superior.

In the latest **Life cycle assessment of windows for the North American residential market, the findings stated Fiberglass windows specifically Inline have a 38% longer useful life expectancy than vinyl. The comparison used an Inline fiberglass window.

 

Our glass units are IGMAC certified. Certification provides assurance to customers, whether they are window and door manufacturers, building code officials, architects and specifiers or home buyers confidence that the insulating glass unit (IGU) product they are buying is designed to meet or exceed the applicable code or standard.

Inline has carefully selected only the best glass companies to work with. Therefore we can offer virtually any type of glass with virtually any combination that is required. This flexibility allows Inline’s trained personnel to provide the right solution for your project.

Our fiberglass window frames expand at virtually the same rate as glass, unlike all other framing materials that expand far greater than the glass they surround. They maintain a tight seal, so they’re resistant to leaks and window failures that can compromise energy efficiency and long-term performance. 

** Life cycle assessment of windows for the North American residential market: Case study” by the University of British Columbia. Scandinavian Journal of Forest Research, 2008.