A roofer, roof mechanic, or roofing contractor is a tradesperson who specializes in roof construction.

Roof decking (also known as roof sheathing) is the wooden boards (plywood or planks) that make up the framing of your roof. It's the foundation of your entire roof system and what your roofing materials are installed on.

Roof covering: shingles, tile, slate or metal and underlayment that protect the sheathing from weather. Sheathing: boards or sheet material that are fastened to roof rafters to cover a house or building. Roof structure: rafters and trusses constructed to support the sheathing.

Flashing (joint covers) Flashing can be flexible or rigid and is made of galvanized steel, aluminum or plastic. It is a type of resistant moulding that prevents water flowing near roof openings from infiltrating the roof. Flashing is found in valleys and at the bases of chimneys, walls, roof vents and plumbing vents.