Soffit & Fascia
About Soffit & Fascia
Soffit and fascia complete the roofline - protecting rafter tails and sheathing edges, closing off the eave, and providing the attic ventilation that keeps Canadian homes healthy through freeze-thaw cycles and humid summers. Pro Materials supplies aluminum and vinyl soffit and fascia from Mitten and Kaycan in vented, solid, and beaded profiles, matched to their siding colour systems so the full exterior reads as one coordinated package. Proper soffit ventilation is among the most cost-effective performance specifications you can make on any project: the right intake-to-exhaust balance prevents moisture buildup, ice dams, and premature sheathing decay that cost far more to remediate than they cost to prevent. Whether you're matching existing siding or specifying a complete new system, we carry the profiles, widths, and colours your job requires - with wholesale supply across Canada.
Soffit & Fascia Buying Guide
Key factors to evaluate when specifying soffit & fascia for your project.
Soffit and Fascia Selection Guide
Soffit type:
Vented soffit allows air to enter the attic cavity, essential for balanced attic ventilation. Match vented soffit area to your ridge vent and attic volume following CMHC and local code guidelines. Solid soffit is used in enclosed eave assemblies or where venting is handled elsewhere. Beaded soffit adds decorative profile detail and is common on heritage and craftsman exteriors.
Material:
Aluminum soffit is the dominant choice in Canada - durable, paintable, won't sag in heat. Vinyl soffit is lighter weight and slightly lower cost; avoid in climates with extreme heat (prolonged +35°C) where vinyl can sag at shallow pitches. Both perform well in cold climates.
Width and profile:
Soffit panels run in 12" single-panel and triple-4" three-channel configurations. Triple-4 installs faster on wider eaves; single 12" is easier to manage on narrow overhangs. Match the J-channel and F-channel accessories to the panel width.
Fascia board width
should cover the rafter tails and any exposed sheathing edge with a minimum 1" overlap beyond the bottom of the rafter. Standard residential fascia runs 6"–8" wide. Wider fascia (10"–12") suits commercial or deep-overhang applications.
Colour coordination
Soffit and fascia typically match each other and contrast with or complement the siding. White and almond are safe neutrals. For a modern look, matching fascia to a dark trim accent or window colour adds sophistication.
Frequently Asked Questions
How much vented soffit do I need?
The standard recommendation is 1 sq ft of net free ventilation area per 150 sq ft of attic floor space, split equally between intake (soffit) and exhaust (ridge or gable). A vented soffit panel typically provides 8–12 sq in of net free area per linear foot - verify the manufacturer's specification for the exact product you're using.
Can I mix vinyl siding with aluminum soffit and fascia?
Yes, this is the most common combination in Canadian construction. Vinyl siding and aluminum soffit/fascia are fully compatible and complement each other well. The key is colour matching - both Mitten and Kaycan offer coordinated colour systems across their siding and soffit/fascia lines.
What is the difference between J-channel and F-channel soffit trim?
J-channel is used where the soffit meets a vertical surface (wall, fascia) and the panel slides into the J receiver. F-channel is used at the inside corner of the soffit and fascia, holding both the soffit panel and the bottom edge of the fascia board. The two work together to create a clean, concealed fastening system.