I'll show you how we installed and leveled the first row of James Hardie plank lap siding. James Hardie installation instructions call for 1 1/4" starter strip, an 1/8" gap between the Hardie plank and the trim, factory cut edges in the field joints and primer on cut plank edges.

PestPlug: https://amzn.to/3TX4Pcj
Vulkem 116: https://amzn.to/3tVmjuZ
GRK Screws: https://amzn.to/3i7CnqT
Gecko Gauges: https://amzn.to/3XspKqA
Tyvek: https://amzn.to/3EpDytj

//DISCLAIMER: Links included in this description area contain affiliate links. If you click on one of the links and purchase a product, I will receive a small commission.