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Add a polished, finished look to your doors and windows with high-quality casing. Casing trim is essential for covering gaps between walls and frames while enhancing the architectural style of your space. Whether you prefer a simple, modern profile or something more decorative and traditional, we carry a wide range of styles, sizes, and materials—including MDF, oak, maple, fir, hemlock, and more. Our casing options are available in raw or pre-primed finishes, ready for paint or stain to match your interior design. Perfect for new builds, renovations, or custom projects, casing trim ties a room together with clean, crisp lines and lasting detail. As a proudly Canadian company with locally owned stores, Windsor Plywood offers hard-to-find moulding profiles and expert advice to help you make the right choice. Visit your local store to explore our full casing selection and complete your project with confidence.
Frequently Asked Questions
What MDF products does Windsor Plywood carry?
Windsor Plywood carries standard interior MDF in common thicknesses from 1/4 inch to 1 inch in standard 4x8 and 4x10 panels. Moisture-resistant MDF for kitchen and bathroom applications is also available. MDF is used for cabinet doors, drawer fronts, shelving, painted furniture components, and millwork profiles.
What is MDF and how is it made?
MDF (medium-density fibreboard) is an engineered panel product made by bonding wood fibres with urea-formaldehyde or other resin under heat and pressure. The result is a dense, consistent panel with no grain direction, no voids, and a very smooth surface. MDF is heavier than plywood of the same thickness and holds paint extremely well due to its uniform, non-porous face.
What are the main advantages and disadvantages of MDF?
MDF advantages include its smooth, consistent surface ideal for painted finishes, its stability without grain movement, and its ability to be machined to clean profiles without splintering. Disadvantages include its weight, susceptibility to moisture swelling at cut edges, lower screw-holding strength at edges compared to plywood, and the requirement for proper respiratory protection when cutting due to fine dust generation.
How do I seal MDF edges before painting?
MDF edges are porous and absorb much more paint than the face surfaces. Apply two coats of quality primer to all cut edges before finish painting, sanding lightly between coats. An oil-based primer or a dedicated MDF edge sealer seals the porous edge more effectively than water-based primer on the first coat. Properly sealed MDF edges accept paint comparably to the face surface.
Is moisture-resistant MDF the same as waterproof MDF?
No. Moisture-resistant MDF (often coloured green to indicate the treatment) has improved resistance to swelling from brief moisture exposure compared to standard MDF. It is appropriate for kitchen and bathroom environments with indirect moisture exposure. It is not waterproof and will still swell and fail with prolonged or direct water contact. For fully wet applications, use moisture-resistant plywood or solid wood.