ᐅ How to Attach a Carport Directly to the House Wall, Like a Roof Purlin?

Hello

We plan to design our carport so that it is attached on one side directly to the house wall. This way, we save some ground anchors and later won’t have any posts in the way along the house wall. The reasons for this are that our house is actually about 10cm (4 inches) closer to the property line than originally planned (why pay 600 euros for surveying if anyone could do better with a tape measure...) and now we need to figure out where to place our space for the double carport.

But how is the purlin (the board that is directly "hung" on the wall) installed? Does it get mounted so high that it can be secured with thick screws or threaded rods into the intermediate floor structure? The brick façade itself can’t hold anything, and in my opinion the 17.5cm (7 inches) aerated concrete wall is not the best support for this either. So basically, only the intermediate floor remains, which should be strong enough to hold the beam on the wall, right?! But is it even possible to reach that height with the carport?

No internal countersinking is desired, of course (living space). Since this carport design is not uncommon, there should probably be a solution for it?!

The house is a townhouse with two full stories and a brick exterior.

Only a structural engineer will likely be able to tell you...

You might want to contact a carport manufacturer. They have likely done this before and can give you the basic requirements upfront.

Personally, I’ve always been reluctant to attach a carport directly to the wall. You penetrate the brickwork, which can cause thermal bridges, and so on. (However, my father fixed the patio roof with a 5-meter (16-foot) span directly into the brickwork at my childhood home—and it has stood like that for over 40 years.)

We also place the carport right next to the wall but on independent posts. Do 10 by 10 cm (4 by 4 inches) posts really cause that much of an issue?

By the way, isn’t there a chance to hold the surveyor responsible? They should at least cover the additional costs. They made the mistake, not you! That’s precisely why they earn a substantial fee. They should definitely have professional liability insurance.

Best regards,

Andreas

I would first consult the structural engineer, and if they approve, then a carpenter.
Additionally, the issue of warranty concerning the house construction and execution regarding the carport extension should be clarified beforehand.
I hope I have expressed myself clearly enough. I’m a bit foggy-headed today.