Construction Boards

Select a board based on material (OSB, plywood, MDF, cement board), thickness and load requirements, exposure to moisture, and compatibility with fasteners and finishes; match board strength and durability to the application (flooring, sheathing, underlayment, or exterior cladding)

Common thicknesses range from 1/4" to 3/4" and larger depending on use; thin boards (1/4"–1/2") suit underlayment and interior panels while 5/8"–3/4" or thicker are typical for flooring and structural sheathing; sheet sizes are often 4x8 feet but specialty sizes are available

Cement board and exterior-grade plywood are more moisture-resistant and suited for wet or exterior applications, while standard MDF and non-treated OSB absorb moisture more readily and are best kept dry or sealed before use

Use fasteners and adhesive recommended for the board material (stainless or coated screws for exterior/cement board), allow proper edge support, and cut with blades appropriate for the material (carbide-tipped blades for plywood/OSB, masonry blades for cement board) to reduce chipping and splintering

Wear eye and respiratory protection when cutting or sanding to avoid dust inhalation, handle large sheets with a partner or mechanical aid to prevent injury, and follow manufacturer guidance for installation to maintain structural performance

Lifespan depends on material and conditions: exterior-grade and cement boards can last decades if installed and ventilated correctly; extend life by keeping boards dry, using appropriate sealants or finishes, and protecting edges from prolonged moisture exposure

Prices vary by material, thickness, and brand; you can find budget options under $50 for smaller or thinner boards, while specialty or thicker exterior-grade boards are higher; the average price for commonly sold boards in this category is around the mid-range