Roofing For Flat Pergola? - Building & Construction - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction


Thread Tools
Display Modes
Old 04-12-2012, 04:40 PM   #1
Join Date: Apr 2012
Posts: 1
Rewards Points: 10

Roofing for flat pergola?

Hi guys, new to the forum but have been reading for a very long time.

Anyway, I built a pergola and have been thinking of adding corrugated roofing panels to the top, on top of the 2x4s that are currently on the top.

However, I built the joists level so the top is pretty much perfectly flat. I am in Arizona where it barely ever rains. Would this be a bad idea to put roofing panels on top with no slope?

I want to add the roof for 2 reasons: Shade and to protect the treated lumber on top. Its difficult to apply a wood preservative up there with my spa below and in my way. Thoughts?
rjjencke is offline   Reply With Quote
Sponsored Links
Old 04-12-2012, 05:13 PM   #2
Civil Engineer
Join Date: Mar 2009
Location: Boston
Posts: 5,832
Rewards Points: 5,246

In your case, a roof poses a few issues. First off, the roof greatly increases the probability of structural failure in a windstorm, specifically the roof coming off, or taking the framing with it if it comes off. You probably don't have snow load issues unless you live in the mountains, but wind definitely needs to be accounted for.

I realize it does not rain too often, but no one ever builds a perfectly flat roof, it would not drain. There is a small, carefully controlled pitch even on a "flat" roof. I have no idea if there are building codes in your area, or if you are subject to any, but you certainly should evaluate if the framing is adequate to support a roof before you go about installing one.
Daniel Holzman is offline   Reply With Quote
Sponsored Links

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Choosing The "Right" Roofing Contractor, How To Evaluate Who Is Right! Ed the Roofer Roofing/Siding 27 04-25-2013 06:10 AM
Manufacture History Roofmaster417 Roofing/Siding 6 02-23-2012 03:40 AM
Roofing Material History Roofmaster417 Roofing/Siding 4 09-08-2011 05:49 PM
Pergola over existing deck cpfullback Building & Construction 0 08-04-2011 12:36 PM
Roll Roofing Edge Leak toolboxone Roofing/Siding 5 10-07-2009 07:09 AM

Top of Page | View New Posts