Patio cover build

[SLONG1958]

I’m going to add a lean to type patio cover to my house and have a few questions. I’m planning on building a 18’ deep x 24’ lean to type open rafter patio cover that will be connected to the house on one end and running out and sitting on a 4x12x24 beam that will be supported by 3 8x8 cypress post 15’ out from the house. The roofing is going to be 29ga tin . Questions #1 Will 2x8x18 rafter on 16” centers be ok. #2 My plan is to use 2x4 pulins with 29ga tin but I’m worried by the heat from the sun on the bare tin underside making it fill let and oven, has anyone every use a heat barrier material under the tin or would it be better to put down something like bead board , tongue and grove ,then the tin on top. If I go with tongue and grove do I need to put something else on top to have enough wood for the tin screws to screw to. #3 What’s everyone thoughts with putting the post in the ground with concrete. The reason for asking this is I’m planning on sitting the post then after they setup notching the post and sitting the beam in the post. So putting them in the ground I’d have more control with getting the notches perfect. #4 Whats the best screws to use for attaching the ledger board the the house. Do I need the use lag screws or would timberlok screws be ok. The ledger board will attach to a beam in the house.
Thanks

 

[Cougar]

#4. I like the construction screws.
https://www.amazon.com/dp/B07ZVYQ4HX/?tag=atomicindus08-20

 

[Toolfool]

Your situation is exactly what LedgerLOKs are designed for.

 

[Git]

A lot is going to depend on where you live - snow load, etc, when it comes to sizing your rafters

Regarding your posts - around here, wood has to stay at least an inch above the ground (which is a good idea) so you would buy a standoff bracket that gets embedded in your footing or you bring your piers up above grade and use bracket.

look at the links in this post for some good info, this is for S Cal:
https://www.garagejournal.com/forum/showpost.php?p=8200407&postcount=5

 

[Dustball]

Going 18 feet out from the house with the ledger that low will result in a very low slope roof. What kind of snow or rain do you see?

 

[SLONG1958]

I live near Memphis Tn so we don’t get much snow. There is going to be 8 to 10” of fall from the house out.

 

[ericlar80]

I would not consider lags any longer after having used these screws for my 47'x16' patio cover. They worked great.
https://www.amazon.com/gp/product/B0084KQVM4/ref=pe_2640190_232586610

Lags are barely made from from halfway decent steel anymore (A325), basically grade 2. And they are a lot of work to install.

I used a large, slow drill motor for sinking the Simpson screws. They sit just flush of the wood surface so you don't have to worry about where joists land in relation. Make sure you follow Simpson's design guidelines for the screws.

 

[SLONG1958]

Ledger board is up, post are in the ground all I need now is to cut the post off and some dry weather so I can get my tractor back there again to sit the 4x12 beam onto the 3 post.
What the best way to secure the 4x12 to the top of the post so that you did see any fasteners.

 

[wasfast]

You might consider these for attaching to the existing roof. Looks like a great solution to the pitch issue:

https://skylifthardware.com/

 

[Git]

I was also thinking about the pitch of your roof. Where your ledger board is currently located, it doesn't look like you have a whole lot of room.

You need to figure out the required slope of your tin roof and where the bottom of the joists will be where they contact your posts with that slope. Then what is the size of your header that will go under the joists (there is usually a minimum height required under the header, and it doesn't look like you have it - something like 6' 8" is needed)

 

[Plump]

Love the idea of wasfast's lift hardware. I have a new idea for something I'll need to build come spring.

Definite concern on pitch. To get proper pitch, you may not be able to see out just standing under your lean-to! Gonna look pretty goofy from the patio doors too. Maybe you've got this worked out and we can't wait to see where you go from here. Good luck and thanks for posting a real "wheel-turner" of an idea.

 

[1redTA]

instead of attaching it to the house build a separate structure and let the roof of the structure overlap your house

 

[SLONG1958]

I’ll have 80” at the bottom of the beam which is marked in yellow down to the concrete and that will give me 10” of fall from the house. I saw the skylift hardware while I was checking thing out but decided this would be easier for me to do. Here’s a pic of what I’ll have. Please let me know what y’all think.

 

[JRC3]

instead of attaching it to the house build a separate structure and let the roof of the structure overlap your house

Similar to the brackets posted above but using posts. This is exactly what I'm considering at my house. Seems it would allow some airflow too.

 

[Git]

I’ll have 80” at the bottom of the beam which is marked in yellow down to the concrete and that will give me 10” of fall from the house. I saw the skylift hardware while I was checking thing out but decided this would be easier for me to do. Here’s a pic of what I’ll have. Please let me know what y’all think.

I think when I look through some of those pdf files I linked to in post #4, that around here, 80" under the beam would be good to go (barely). You may need to check what is code for your area. Otherwise, it looks like your off to a good start if you have met the minimum slope of the roof for your area

What are you using for slope? Around here some places want 1/4" per foot minimum

 

[Git]

Another option on the header. Instead of a solid 4 x 12 (may be hard to get it into place if your working by yourself) we can substitute TWO 2 x 12's

Looks like this

 

[SLONG1958]

Just about finished all but concrete and staining the wood.
Thanks anyone for the info.

 

[yeldogt]

Too late .. but with that construction and yard area that would have looked great as a stand alone structure with conventional roof -- tiny breeze roof to the house.

still get light to the back windows of the house

 

[Joemctag]

The knee braces look great. Maybe if there’s an earthquake or tornado, you should consider taking shelter under your new structure rather than the hous.

 

[LeahRoberts]

For the patio to combine appearance with practicality, it is necessary to take a responsible approach to its arrangement. First of all, you should know that the patio area is always made with a slight slope away from residential buildings, eliminating the accumulation of rainwater on it. The "flooring" of the patio can be used in materials such as brick, stone, wooden decking, etc. The most popular materials include paving tiles, which are environmentally friendly, durable, and resistant to climatic influences. Often the patio area is bordered by a lawn, and the building wall acts as the main vertical element. But the most important thing is to have https://www.gardenfurniture.co.uk.