Cascadia Windows & Doors

• ▸Founded: 2000
• ▸HQ: Chilliwack, British Columbia, Canada
• ▸Market position: Premium fibreglass windows - among Canada's highest thermal performance
• ▸Primary material: Pultruded fibreglass profiles
• ▸Thermal coefficient: Fibreglass and glass expand at the same rate - reduced seal stress through temperature cycling
• ▸Climate context: BC - heavy rainfall (Lower Mainland), extreme cold (Interior), coastal humidity
• ▸Certifications: Passive House PHI, ENERGY STAR, CSA
• ▸Website: cascadiawindows.com

• ▸Cascadia Fibreglass Casement Windows
• ▸Fibreglass Awning Windows
• ▸Fixed Lights
• ▸Lift and Slide Doors

Cascadia windows regularly achieve window energy ratings that exceed most other Canadian manufacturers. The fibreglass frame, combined with triple or quad glazing and warm-edge spacer bars, produces a system that loses very little heat through the frame itself. Because fibreglass and glass have the same thermal expansion rate, sill drainage on Cascadia windows experiences less movement-induced cracking than in uPVC systems. However, BC rainfall is heavy - drainage channel clearing is still essential at every visit in the Lower Mainland. The factory finish on Cascadia fibreglass frames is applied as a paint or gel coat. This surface responds differently from powder-coat on aluminium - it is more chemically sensitive to solvents but more resistant to abrasion than uPVC. Passive House airtightness detailing at the frame-to-wall junction uses vapour membranes and specialist tapes that are part of the certified building envelope. No water application at this zone during cleaning.

This is how I clean Cascadia Windows & Doors windows. The tools and technique below come from 25 years of daily professional work on the glass. Every step has been tested on real installations and adapted specifically for Cascadia Windows & Doors systems.

• ✕Do not use solvent-based, acetone, or citrus-oil cleaners on fibreglass gel coat or painted surfaces
• ✕Do not use razor blades on glass without confirming that no inner-face Low-E coatings are present - Passive House glazing almost always has multiple coatings
• ✕Do not pressure-wash Cascadia windows - Passive House airtightness membranes at the frame-to-wall junction must not be disturbed
• ✕Do not use hard brushes on organic staining on north-facing fibreglass frames - soft cloth with dwell time is the correct approach
• ✕Do not skip sill drainage clearing in BC - 1,600mm of annual rainfall makes drainage capacity a maintenance issue, not a seasonal one

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