Well call me half hazard.
Foam insulation on siding with nail strips.
Lp siding with fern strips over insulation.
Wood siding failure diagnosis for siding installed over foam insulation.
Of course i did this all knowing my warranty would be void.
This detail is used with both new construction and also with renovation work.
This eliminates thermal bridging which is the energy lost through wall studs.
Given the beefiness of their headlok fasteners i m going to say that one end of that spectrum is serious overkill vs the other.
When applying james hardie siding to furring strips which is applied on foam sheathing or other non nailable substrates e g.
The studs conduct more heat than the insulation between them.
Gypsum sheathing with a combined thickness up to 4 inches thick the foam sheathing and other non nailable substrates do not have nail holding capacity.
Their table suggests that vinyl attached to furring strips over 1 of foam is the same as cementious siding over 4 of foam.
Installing foam board insulation under vinyl siding today more than ever before homes are being built with foam board insulation installed on the outside of the sheathing and under the siding.
Insulated foam sheets are also used as an insulated sheathing underlayment for exterior siding.
The panels provide a continuous energy efficient surface.
Below are some of the design details along with the benefits.