Many doors have a sill or threshold that needs to be supported so don t forget to install a kick plate under the door.
Hpatio how far belwo siding.
All hardscape within 10 feet of a building must slope away from the building with a minimum slope of 2 percent.
As such a patio falls under the irc recommendations on grading and drainage.
From the top of the decking to the bottom of the patio door threshold.
It protects the sheathing from rain snow and pests.
Below the top of the foundation but the lower the vinyl siding is installed the better.
The bottom of the starter strip the part the bottom panel hooks on to should be at least 1 in.
The further the better.
Moisture could build up and leak its way into your indoor flooring or between and under the siding inviting bigger problems.
Wood siding should be 4 or so from the ground whether that be soil or solid surface.
Six inches would not be too far.
The wood is not sitting in a moist or wet condition so it is not wicking moisture.
This allows the patio to be constructed 1 2 away from the sheathing giving an air gap that will allow moisture to drain and evaporate.
I opted for 3 1 2 in.
Aluminum or fiberglass groundbreaker flashing is placed just up under the bottom of the trimmed siding and extends below the last wood element on the home the sill plate.
By installing the properly flashed deck at a level slightly below the home s flooring you can ensure that any water flows down and away from your primary structure.
That means that the patio must slope away from your house at least 1 4 inch per foot for at least the first 10 feet from the house exterior.