Exterior Siding 101: A Guide from Castle Building Supplies
Siding does a lot of quiet, unglamorous work — it’s your home’s first line of defense against wind, rain, snow, and sun, all while doing most of the heavy lifting for curb appeal. With so many materials and brands out there, it helps to understand the main categories before deciding what’s right for your project. Here’s a breakdown, along with a look at the siding brands we carry.
The Main Siding Materials
Vinyl Siding
Vinyl is the most common siding choice in Canada, and for good reason: it’s low-maintenance, resists rot and insects, never needs painting, and comes in a huge range of colours and profiles. It’s generally one of the more affordable options up front, though quality varies a lot between product lines — thicker, better-engineered vinyl resists fading, cracking, and impact damage far better than bargain-bin panels.
Wood Siding
Wood siding offers a natural look that vinyl and composite products try to imitate, with warmth and texture that’s hard to replicate artificially. It requires more upkeep — periodic staining or painting, and attention to moisture — but for homeowners who want an authentic finish, nothing quite matches it.
Steel Siding
Steel siding is exceptionally durable, resistant to impact, fire, and warping, and holds up well in harsh climates. It’s a strong option for homeowners who want long-term durability and are willing to pay a bit more upfront for it.
Composite & Engineered Products
These blend wood fibers or polymers with resins to create products that mimic the look of natural wood while resisting the moisture and insect issues that come with the real thing — a middle ground between traditional wood and lower-maintenance synthetic options.
Some Brands We Carry
Gentek
Gentek is one of the most established names in vinyl siding in Canada, offering a wide range of profiles from board-and-batten styles to more traditional lap siding, along with matching soffit, fascia, and trim so your whole exterior can coordinate in one colour system. Gentek also manufactures aluminum and steel siding options for homeowners who want more impact resistance than vinyl offers.
Cape Cod
Cape Cod is a specialist in finished wood siding, offering pre-primed and pre-finished wood products that cut down on on-site prep work without sacrificing that natural wood look. It’s a strong choice for homeowners who want the authenticity of real wood siding with less of the traditional hassle of painting and finishing after installation.
Marwood
Marwood brings decades of experience in wood products, offering wood siding alongside a broader lineup of outdoor wood goods like decking, railings, and fencing. If you’re planning a project where siding, deck, and railing materials should visually tie together, Marwood’s range makes that easier to coordinate.
Mitten
Mitten offers a solid lineup of vinyl siding, giving homeowners another dependable option in traditional lap and specialty profiles at a range of price points — useful if you’re comparing options within the vinyl category before settling on a look and budget.
Doman
Doman is one of the larger building materials distributors in the siding and trim space, carrying a broad catalogue of siding, trim, and fibre cement products from multiple manufacturers. Working with Doman gives us access to a wide range of styles and materials — including steel panel systems and fibre cement options — beyond what a single manufacturer’s lineup alone would offer.
A Few Things to Think Through Before You Choose
- Climate exposure: Homes in areas with heavy wind, hail, or coastal salt air benefit from more impact- and corrosion-resistant materials like steel or higher-grade vinyl.
- Maintenance appetite: Wood siding looks fantastic but asks more of you over time. If low-maintenance is the priority, vinyl or steel will save you the recurring upkeep.
- Insulation: Some siding systems pair with rigid foam backing for added energy efficiency — worth asking about if you’re re-siding an older, under-insulated home.
- Colour and profile matching: If you’re only replacing a section of siding rather than the whole exterior, check with our team early about colour matching, since manufacturers occasionally update their palettes.
Stop By and Ask
Whether you’re planning a full re-side or patching a damaged section, Castle Building Supplies carries Gentek, Cape Cod, Marwood, Mitten, and Doman siding products. Bring in your measurements, photos, or existing siding sample, and our team can help you find the right match for your home and your budget.
