Plywood

The right plywood depends on the job. Hardwood plywood is a good all-round option for general construction, joinery, boxing-in, shelving and interior projects where a strong sheet is needed. Softwood plywood is often used for building work, roofing, boarding and general site use. Birch plywood is a better choice when you want a cleaner finish and good strength, while marine plywood is suited to more demanding areas where moisture resistance is important.

Plywood is used for a wide range of building, joinery and DIY projects. Common uses include roof decking, wall sheathing, flooring, cabinet making, shelving, boxing-in, hoarding, furniture, packaging and general repairs. It is popular because it is strong, stable and available in different thicknesses, so it can be matched to the level of strength, finish and moisture resistance needed for the job.

Some plywood can be used in external or humid conditions, but it depends on the type and grade. Exterior-grade and marine plywood are better suited to areas where moisture is likely, while standard interior plywood should only be used in dry conditions. Even when using moisture-resistant plywood, edges and cut ends should be sealed properly to help protect the board and extend its lifespan.

Hardwood plywood is generally chosen when a smoother face, better finish or more decorative result is needed. It is often used for joinery, furniture, shelving and interior building work. Softwood plywood is commonly used where practicality and strength are more important than appearance, such as roofing, boarding, sheathing and general construction. Both can be useful, but the best choice depends on whether finish, cost or site performance matters most.  

Marine plywood is best used for projects where the board may be exposed to higher moisture levels or more demanding conditions. It is commonly chosen for exterior joinery, bathrooms, utility areas, boat-related work, signs, and applications where better moisture resistance is needed. It still needs to be installed and sealed correctly, especially on exposed edges, as no plywood should be left unprotected in wet conditions for long periods.

Birch plywood is worth choosing when you need a stronger, neater and more consistent board. It is often used for furniture, cabinets, shelving, decorative joinery, worktops, drawer boxes and projects where the board edge may remain visible. It usually costs more than standard plywood, but it gives a better finish and is a good option for higher-quality interior work.  

The thickness depends on how the plywood will be used. Thin sheets are suitable for lightweight covering, templates, backing panels and decorative work. Medium thicknesses are often used for boxing-in, shelving, wall lining and general joinery. Thicker plywood is normally used where more strength is needed, such as floors, roofs, workbenches or structural boarding. For load-bearing work, always check the project specification before ordering.

Yes, plywood can be painted, stained or sealed, but the finish will depend on the plywood type and face quality. For painted work, sand the surface, fill any imperfections and use a suitable primer before applying the top coat. For staining or clear finishes, choose a plywood with a cleaner face, such as hardwood or birch plywood. If the board is being used in a damp area, seal the faces and edges carefully.