The answer to 'best roof decking' is that oriented strand board (OSB) is generally considered the best roof decking material for most residential homes. OSB is a cost-effective, durable, and widely available wood-based panel that provides a sturdy base for your roofing system. It's made by layering wood strands or flakes and bonding them together with resin, creating a strong and uniform surface.
OSB is a popular choice because it's easy to install, resistant to moisture and pests, and can withstand the weight of roofing materials like shingles, tiles, or metal. It also provides good thermal and structural performance, helping to support the roof and insulate your home. When installed properly with the right fasteners and sealing, OSB roof decking can last for decades.