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Is it or isn't it a good idea to tie a pergola into a roof?

Posted on 6/21/16 at 11:00 am
Posted by Hammond Tiger Fan
Hammond
Member since Oct 2007
16209 posts
Posted on 6/21/16 at 11:00 am
I'm looking to extend my outdoor patio area. The rear of my house has two different roof line heights. The higher one, which is coming off the main part of the house, I want to install an insulated aluminum patio cover. The lower one, which is coming off of a bedroom, I want to attach a pergola to the roof. This location is also where I'm wanting to put a small outdoor kitchen (i.e., built-in grill, small frig, bar overhang countertop, storage space). We are wanting to attach it to the roof to eliminate the need of two of the support posts that will be in the way of where I'm trying to place the kitchen. I'm also wanting to go with a pergola for the lower roof line primarily so that the smoke coming off of the grill can easily exhaust in the open air. However, from my research so far I've been reading from some sites that his might not be a good idea to tie a pergola into the roof. So, is it or isn't it a good idea?
Posted by bonescanner
Member since Oct 2011
2238 posts
Posted on 6/21/16 at 11:15 am to
I ran a rain gutter along my roof line and flashing from my pergola into the gutter. So no water drip, but not attached to my house. Worked well so far.
Posted by junkfunky
Member since Jan 2011
33853 posts
Posted on 6/21/16 at 11:25 am to
There are a few potential issues but it might be possible. However, do you have a flat soffit? If so you could drop the pergola down the depth of the eave/fascia member and provide a ledger at the wall to get the new loads away from the roof edge and back to the load-bearing wall. You'll want to do some kind of flashing either way to keep the water from sitting where the two meet and rotting either the fascia or the pergola members.
Posted by Hammond Tiger Fan
Hammond
Member since Oct 2007
16209 posts
Posted on 6/21/16 at 12:36 pm to
quote:

However, do you have a flat soffit? If so you could drop the pergola down the depth of the eave/fascia member and provide a ledger at the wall to get the new loads away from the roof edge and back to the load-bearing wall.


Yeah, but the problem with that is it will create a very, very low ceiling height. The roof line of the soffit where it's going is around 8 feet or so. If I drop it, the ceiling height will be 7 feet or less and with me being 6'4" that's way too low. This is another reason why I want to attach it to the roof so that I can give myself a little more ceiling space.
Posted by LSUBoo
Knoxville, TN
Member since Mar 2006
101914 posts
Posted on 6/21/16 at 12:38 pm to
I wouldn't... just use two more posts to keep the pergola free-standing, and design them into the outdoor kitchen.
Posted by junkfunky
Member since Jan 2011
33853 posts
Posted on 6/21/16 at 12:46 pm to
quote:

Yeah, but the problem with that is it will create a very, very low ceiling height. The roof line of the soffit where it's going is around 8 feet or so. If I drop it, the ceiling height will be 7 feet or less and with me being 6'4" that's way too low. This is another reason why I want to attach it to the roof so that I can give myself a little more ceiling space.


Wait....it sounds like you aren't talking about supporting the pergola from the eave but rather in the field of the roof. Is this correct and how far from the eave do you plan on supporting the pergola?
This post was edited on 6/21/16 at 12:47 pm
Posted by junkfunky
Member since Jan 2011
33853 posts
Posted on 6/21/16 at 12:47 pm to
quote:

I wouldn't... just use two more posts to keep the pergola free-standing, and design them into the outdoor kitchen.


This is ideal.

Hammond do you happen to have a basic plan of the area you want the pergola? Or just some pictures.
Posted by Hammond Tiger Fan
Hammond
Member since Oct 2007
16209 posts
Posted on 6/21/16 at 12:54 pm to
quote:

Hammond do you happen to have a basic plan of the area you want the pergola? Or just some pictures.


Because of everything I'm hearing and reading, I think I'm going to resort to doing something like this



This post was edited on 6/21/16 at 1:04 pm
Posted by LSUBoo
Knoxville, TN
Member since Mar 2006
101914 posts
Posted on 6/21/16 at 1:00 pm to
It sounds like you were talking about potentially tying it into the roof plane itself, rather than just the fascia or eave. If you do end up attempting that, look into your warranty and insurance... I wouldn't be surprised if you would violate terms of both.

Keep it as free-standing as possible.
Posted by Doomaflochie
Member since Jan 2011
285 posts
Posted on 6/21/16 at 1:00 pm to
I don't understand the purpose of a pergola Minimal shade. Everything will always get wet.
Posted by Hammond Tiger Fan
Hammond
Member since Oct 2007
16209 posts
Posted on 6/21/16 at 1:03 pm to
quote:

I don't understand the purpose of a pergola Minimal shade


I can stable a solar screen on the top to help with fight the sun. I'm not worried about rain and stuff getting wet.
Posted by Hammond Tiger Fan
Hammond
Member since Oct 2007
16209 posts
Posted on 6/21/16 at 1:05 pm to
quote:

It sounds like you were talking about potentially tying it into the roof plane itself


That's what I initially wanted to do, but it seems like there will be too many risks associated with that decision. The pictures I posted are some other designs that I may have to fall back on to obtain a similar look.
Posted by fishfighter
RIP
Member since Apr 2008
40026 posts
Posted on 6/21/16 at 1:10 pm to
quote:

I wouldn't... just use two more posts to keep the pergola free-standing, and design them into the outdoor kitchen.


This. But in the first place, I wouldn't own a pergola here in Louisiana. Way to dam hot and I want shade.
Posted by Hammond Tiger Fan
Hammond
Member since Oct 2007
16209 posts
Posted on 6/21/16 at 1:16 pm to
quote:

This. But in the first place, I wouldn't own a pergola here in Louisiana. Way to dam hot and I want shade


This won't be my only seating area. I will have another space of approximately 24x16 that will be covered with 3 ceiling fans underneath it.

I'm just trying to have something over my outdoor kitchen to aid with the sun while I'm out there.
Posted by Chad504boy
4 posts
Member since Feb 2005
166117 posts
Posted on 6/21/16 at 1:19 pm to
what if its raining and you need to cook? standing seam metal roof, no questions.
Posted by halleburton
Member since Dec 2009
1519 posts
Posted on 6/21/16 at 4:07 pm to
Good luck keeping those cantilevered members from sagging over time. Add a 4th post and do it right.
This post was edited on 6/21/16 at 4:15 pm
Posted by Hammond Tiger Fan
Hammond
Member since Oct 2007
16209 posts
Posted on 6/21/16 at 11:18 pm to
quote:

Good luck keeping those cantilevered members from sagging over time. Add a 4th post and do it right.



So my alternative isn't a good idea either?
Posted by Hammond Tiger Fan
Hammond
Member since Oct 2007
16209 posts
Posted on 6/22/16 at 9:06 am to
So what if I attach it to the fascia and reinforce the strength with adding a 2x8 header instead of the roof? Will there be any issues with this approach? Something similar to this is what I was thinking.



These guys went above the roof line , behind the gutter and back to the soffit framing using 1/2'' old steel soffit L brackets.
Posted by RedHawk
Baton Rouge
Member since Aug 2007
8836 posts
Posted on 6/22/16 at 9:24 am to
Count me in as never understanding why somebody would want a pergula over a covered area. I cook a lot outside and a lot of times it is in the rain.
Posted by halleburton
Member since Dec 2009
1519 posts
Posted on 6/22/16 at 12:06 pm to
I wouldn't put anything on the roof unless you know how to properly flash and re-shingle it. Free standing is much safer and cleaner looking, even if it's taller than the overhang.

If you are set on the 3 post design, I would add another joist across the hypotenuse and create a triangle shaped pergola. No matter how many screws you use on the unsupported/cantilevered members, they will definitely sag over time and look like crap.
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