![]() Similar to our polycarbonate option, metal sheets can be added on top of the regular wood slats to give strong protection against rain and sun. These plastic-like panels can be added on top of the wood slats to offer added protection from rain and sun. The wood slats have a clean look, and can compliment almost any style of home. Our standard pergola comes with wood cross slats that provide a small amount of shade protection. Geoff, a builder friend, once said that for a smaller sized pergola, with 4 x 2 rafters, the pergola beam span should be no bigger than the width of a. a 2圆 can span around 8 on a floor joist at 24 inch on center and around 96. Our pergolas can be built with one of three roofing options: Wood Slats: Depends on the species and grade of the wood, spacing, plus local codes. Contact us for options and pricing on custom options. Adding more or larger top slats will produce more shade. Along with the rafters, the top slats will help to produce shade. Pressure treated pine will come with 2×4 top slats and cedar will come with 2×2 slats. Top Slats – 2×2 or 2×4 lumber depending on wood type. We've got instructions and examples to show you how to space rafters when the numbers don't make it easy, when to use an even number of rafters and when to use an odd number, when to start your spacing with a rafter in the very center of the roof, and more. Because of the angle of the sun at most times of the day, its actually the vertical height of the rafter (8 inches in a 2×8) that is most important in determining the amount of shade that you get from your pergola. Figuring out proper pergola rafter spacing can be tricky. Advertisement For example, 2-by-6 rafters made from select structural grade Douglas fir that are required to support a live load of 20 pounds per square inch can have a maximum horizontal span of 11 feet 4 inches. The rafters on a pergola are responsible for the majority of the shade and that is why it is important that they are spaced close and made from larger wood. All else being equal, decreasing rafter spacing increases the maximum rafter span. The rafters run opposite from the beams and are spaced at 12” on center. Rafters – 2×6 or 2×8 depending on the size of the pergola. The beams will hang out approx 12 inches past the edge of the post and will be the support for the rafters. There is one double-beam on each side of the pergola. The posts are either attached to existing patio with 3 inch concrete anchors, or set in concrete in the ground (approximately 24” deep.)īeams – 2×8 or larger, depending on size of the pergola. Posts – 6×6 lumber is standard, but can be upgraded to bigger 8×8 posts for an additional fee. Our standard pergola design includes 4 main parts:
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