Cellular PVC Sheet 4′ x 8′ x 3/4″ — Woodgrain / Smooth, Black

A full 4 by 8 foot sheet of cellular PVC, 3/4 inch thick, moulded black all the way through. One face carries a woodgrain texture, the other is smooth. The core is closed-cell foam — dense enough to hold a screw, light enough that one person can carry a sheet.

Black through the thickness, not painted

Black is hard to buy in cellular PVC in Atlantic Canada, and the usual workaround — painting a white sheet black — is the one thing the material does not tolerate. A dark film over a white substrate drives surface temperature well past what the compound was formulated for, and an 8-foot panel will move enough to open every joint around it.

This sheet is pigmented and heat-stabilised in the compound. It still runs hotter than white and the installation notes below allow for that, but it moves predictably and there is no paint film to chalk, peel or need redoing.

A routed edge, a chamfer or a saw cut stays black. On a painted sheet, every cut is a touch-up.

What a 4 × 8 sheet is for

A trimboard solves a line. A sheet solves a surface. This is the stock you reach for when the detail is wider than a board:

• Column and post wraps, cut to width from one piece instead of built up from four boards
• Soffit and porch ceiling panels on a covered entry
• Window and door surrounds wider than 5-1/2 inches, and the pilasters and plinths under them
• Cabinet carcasses and vanity bases in bathrooms, laundries and boat interiors — places where plywood eventually fails
• Skirting on a raised deck, where the panel sits an inch off wet ground for twenty years
• CNC and router work: signage, brackets, corbels, templates. It machines cleanly and holds a crisp edge.

Working with it — the manufacturer’s own guidance

• Cutting. Standard woodworking equipment, carbide-tipped blades. Do not use fine-tooth metal-cutting blades. A rough cut edge comes from too much friction, poor support under the board or the wrong tooling — not from a bad board.
• Drilling and routing. Standard woodworking tools, carbide router bits. Clear the shavings out of a drill hole as you go so heat does not build up. Below 0 °C (32 °F), pre-drill before nailing.
• Fastening. Stainless steel or hot-dipped galvanized nails or screws. No staples, no brads, no wire nails — a fastener you can bend with your fingers will not hold. It has to reach at least 1-1/2 inches into solid wood, two fasteners at every framing member, within 2 inches of each end, and on sheets no more than 8 inches apart.
• Gluing. PVC cement, edge or face, on clean dry surfaces. Glue alone is not enough for a lasting bond: BOTO specifies glue and mechanical fasteners together, and the joints between pieces glued so they cannot separate.
• Spanning. Fine for fascias, soffits and ceilings. Never load-bearing. Beyond 16 inches on centre you need a 1/2-inch plywood or OSB backer with construction adhesive, fastened at least every 16 inches.
• Expansion. BOTO’s own figure is 1/8 inch per 18 feet. Fasten along the full length and glue the joints and the movement stays where you put it; leave the expansion space at the ends of a long glued run, never in the middle of it.
• Storage. Flat and level — it takes the shape of whatever it is stored on. Not on asphalt, not anywhere heat builds up.
• Black runs hotter than white. This is exactly why BOTO advises against dark paint on their white boards. A board pigmented black through the compound is made for it, but it still reaches a higher surface temperature: fasten along the full length, two fasteners per framing member, glue the joints — and if you have the choice, install on a cool day rather than in full afternoon sun. Do not paint it.

What it is not

It is not structural. Cellular PVC carries its own weight and nothing else — it is not a header, not a stair tread, not a load-bearing member.

It is also not a fire-rated product. We do not hold an ASTM E84 report for this item and will not quote a flame-spread class for it. If your job requires a rated assembly, specify a rated material.

Specifications

• Actual size 19 × 1,220 × 2,440 mm (3/4″ × 4′ × 8′)
• Faces: woodgrain one side, smooth the other
• Closed-cell foam core, black through the full thickness
• Approx. 31 kg per sheet
• Factory bundle: 20 sheets

Three ways to buy

From stock in Stratford, by the factory bundle, or by reserving a share of the next container before it ships. The price block above shows all three. Nothing is held back and there is no sale price — the number depends only on how you buy.