Make the Best Redwood Deck Pergola your own. Choose your wood, either A- or B-grade Redwood. A-grade redwood is cut from the heart of the tree and is nearly perfect, while B-grade wood may feature more natural color. After that, choose your post size and roof size to match the size of your patio or yard. Finally, choose your stain: clear, heart, mahogany, or natural. No matter what you choose, this pergola is bound to beautify your home.