Insulated Concrete Forms (ICFs) offer an embedded furring strip every 8” on center.

As wooden shingles will require an air space, here is a good option for fastening to an ICF wall:

• Strap vertically with pressure treated 1×3 strapping.
• Strap again with 1×3, this time horizontally, with the horizontal spacing lining up with the nailing area on the single.
• Fasten the shingles to the strapping.

Please note that you should always refer to the shingle manufacturer for the specific recommended installation.