The washer under the screw head should seal to the surface of the panel without bulging or shifting.
How to install strapping for siding.
Siding needs vertical strapping to create an air space to allow moisture to escape and water to drain read more here how to install siding so walls can dry.
Have you wondered how to install steel siding on a pole barn.
Hold the swing stick near the window casing.
On the outside corners we strapped with 8 wide rips of 3 4 plywood to give good nailing for the 6 vinyl corner boards.
Install 1 2 inch 12 7 mm foam sheathing strips on both sides of each corner then install your corner siding pieces to these strips.
I guess it depends on your climate whether the drying to the exterior through the siding is sufficient.
That s a valid concern you have and yes you should have some sort of protection that allows water to flow out the bottom and air to flow up so humidity can escape at the top.
While sloping the horizontal strapping or cutting drainage notches might deal with any intrusion of bulk water that gets past the siding it doesn t allow any ventilation of the space.
The corner posts should run from 3 4 inch 1 9 cm below the bottom of the starter strip to just beneath the eaves after the soffit pieces have been installed.
Place the first screw about 7 inches from the bottom and each subsequent screw about 18 to 24 inches apart along the vertical run.
Secure the screws but do not overtighten.
The sheets cover 3 foot so it goes up pretty fast.
In this video i show how easy it can be.
When a mark on the lower part of the stick lines up with the butt edge of the last installed clapboard transfer the marks on the stick to the wall.
We would later be installing vertical strapping 16 oc so we didn t go overboard with the roofers and tins.
All foam seams were taped with aluminum tape.
Install the roofing screws vertically along each rib in the panel.