I often run into this issue when doing remodel projects. We added a front porch to this house and the inside to outside concrete only had a 3/4" drop to transition from framing to the porch slab. In this video I'll show you how to use a let-in stainless flashing to make a long term waterproof connection on this covered porch.
FYI: I bought the flashing locally at a roof flashing house, but you can likely have your roofer bend this profile for you. Also, the Prosoco Joint and Seam is available via local distributors. Here's their spec page. https://prosoco.com/product/joint-sea...
Lastly, the Butyl Sealant I'm using is Mortar Net's https://mortarnet.com/btl-1-sealant/
Alternatively, you can use an all-Butyl sealant like this available locally. https://amzn.to/34DI8Cc
My Tajima Chalk Line. https://amzn.to/3eh6I01
Lastly, check out my Amazon store for my favorite Tools, Building Books, and other gadgets that I've liked over the years! https://www.amazon.com/shop/mattrisinger
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or Twitter   / mattrisinger  

Huge thanks to our Show sponsors Polywall, Huber, Dorken Delta, Prosoco, Rockwool & Viewrail for helping to make these videos possible! These are all trusted companies that Matt has worked with for years and trusts their products in the homes he builds. We would highly encourage you to check out their websites for more info.

http://www.Poly-Wall.com
http://www.Dorken.com
http://www.Huberwood.com
http://www.Prosoco.com
https://www.Viewrail.com
https://www.Rockwool.com