Fiberglass vs Vinyl Windows: Which Is Right for Your Home?
Fiberglass and vinyl can both suit your replacement, and the right choice depends on priorities such as larger openings, finish choices and how long you plan to stay.
| Consideration | Fiberglass | Vinyl |
|---|---|---|
| Frame stability | Moves less with temperature | Review the selected profile |
| Strength and sightlines | Narrow profiles in suitable designs | Compare the available glass area |
| Heat transfer | Low conductivity | Assess complete window performance |
| Maintenance and finishes | Factory finish options | Check product care and colour options |
Our vinyl replacement windows also offer options for your project. Ask us to compare specific configurations and written estimates so your decision reflects your priorities and budget.
Fiberglass Window Styles, Colours and Glass Options
Inline’s range includes standard and custom colours, with different interior and exterior finishes on applicable products. We review Low E glass and grille options, and confirm the available glazing packages for your selected windows before ordering.

Casement and awning windows

Hung and sliding windows

Tilt-and-turn windows

Fixed and contemporary windows

Bay, bow, and custom configurations
What Affects the Cost of Fiberglass Windows?
These factors shape your fiberglass window estimate:
- Window count and dimensionsmore windows and larger openings mean more glass, framing and labour.
- Style and operationfixed windows have no moving parts, while operable windows add hardware.
- Colour and finishcustom colours or different interior and exterior colours can add cost.
- Glass and grillestriple glazing and grille patterns can raise the price.
- Existing opening and trimrot, water damage or damaged trim may need repair before installation.
- Accessupper-storey or hard-to-reach windows need extra equipment.
A written estimate follows your free in-home assessment. Our pricing guide covers standard-window ranges, and Inline fiberglass windows are quoted separately.
Fiberglass Windows FAQs
Neither is better for every home. Fiberglass frames move less with temperature and can allow slimmer sightlines, while vinyl needs no painting. We compare both options against your priorities and budget.
We quote your fiberglass windows after measuring your openings. Window count, size, style, finish, glass and installation requirements affect the total, and a written estimate follows your free in-home consultation.
Inline Fiberglass manufactures the windows. We help you choose the configuration for your home, then handle the replacement and installation with our own crew.
Your fiberglass frame expands and contracts very little through Ontario’s temperature swings, and it conducts very little heat. How your windows perform through winter also depends on the complete window, including the glazing, weatherseals and installation.
Compare written estimates first. If fiberglass costs more for your selected configuration, weigh that difference against the frame stability, sightlines and finishes you want. Material alone does not determine value.
No. We supply and install our own windows. We don’t install windows purchased elsewhere, so every project goes through one company from product to finished installation.







