Framing or one bay for 24 inch o c.
How much should you over lap metal siding.
In other words if the height of the roof drops by 2 inches for every 12 inches in length you will need to use sealant to strengthen the overlap barrier.
For walls longer than 12 feet you ll need to butt additional lengths of siding together.
Frank regardless of where you live you should never go over any siding especially when the existing siding is in poor condition.
Metal sealing and fastening apply side lap sealant if the pitch of your roof is 2 12 or less.
Butt joints in adjacent courses should be spaced apart by at least two stud bays for 16 inch o c.
This strip will kick out the bottom of the first lap as if it were sitting on top of another lap.
If that company you mentioned gave you a lower estimate it s for the reason you stated.
I would suggest getting several estimates if you haven t done so already.
On the eave side of the roof aim to overhang the panels by 1 to 1 5 inches.
According to the best practices manual from james hardie existing siding can be used as a substrate as long as it is in good condition meaning that it is not warped.
They are cutting corners on your job to keep costs down.
You never know what could be hiding under the old siding.
Using existing siding for replacing siding the best place to start is to closely examine the existing siding to get a good understanding of what condition it is actually in.