Help me plan my pergola! Roof or no roof? Is 16 ft too wide?

I am looking to build a 12 x 16 pergola over half of my patio this summer. Attached are online plans that closely follow my initial design, and a pic of my patio. The 4x4s present will be removed and 6x6 posts used and anchored to the patio. The only major difference between my plan and the posted pic is the beams will either 12 or 14 feet apart and the 2x8s only 16 feet. Questions: Is a 14 foot span of 2 2x8s sufficient to hold the load without bowing? Will I need support kickers? Should I only use one support beam and hang 2x4s joist style for simplicity (also would make attaching roofing easier) I’m hoping to make a sloping roof, how would you suggest mounting that? Most of my ideas work for 90 degree angles, but a sloping roof may complicate it. If I were to do so, how would i attach to the support beams? Notches? Is exterior grade plywood a good roofing idea? We’d stain and attach white lattice underneath make it pretty, mostly curious about the waterproofing and resiliency of plywood. Also any input on making it removable is welcome. Don’t be too hard on me, I’m a newbie! Ideally the house edge would site just above the gutters at around 9-10 feet, and the outside edge about 8 feet. Thanks for the input! (In the process of talking to township about necessary permits) submitted by /u/Super-Aide1319 [link] [comments]

Apr 6, 2025 - 19:51
 0
Help me plan my pergola! Roof or no roof? Is 16 ft too wide?
Help me plan my pergola! Roof or no roof? Is 16 ft too wide?

I am looking to build a 12 x 16 pergola over half of my patio this summer. Attached are online plans that closely follow my initial design, and a pic of my patio. The 4x4s present will be removed and 6x6 posts used and anchored to the patio. The only major difference between my plan and the posted pic is the beams will either 12 or 14 feet apart and the 2x8s only 16 feet.

Questions:

  1. Is a 14 foot span of 2 2x8s sufficient to hold the load without bowing? Will I need support kickers?

  2. Should I only use one support beam and hang 2x4s joist style for simplicity (also would make attaching roofing easier)

  3. I’m hoping to make a sloping roof, how would you suggest mounting that? Most of my ideas work for 90 degree angles, but a sloping roof may complicate it. If I were to do so, how would i attach to the support beams? Notches?

  4. Is exterior grade plywood a good roofing idea? We’d stain and attach white lattice underneath make it pretty, mostly curious about the waterproofing and resiliency of plywood. Also any input on making it removable is welcome.

Don’t be too hard on me, I’m a newbie! Ideally the house edge would site just above the gutters at around 9-10 feet, and the outside edge about 8 feet. Thanks for the input!

(In the process of talking to township about necessary permits)

submitted by /u/Super-Aide1319
[link] [comments]