I am interested in the best method for installing 5/4 x 12" rough sawn cypress siding. We've used double hot dipped galvanized nails but with no finish on the wood experienced some checking and warping after 8-10 years. I am re-doing and adding on to the house and have used coated (Prime-guard plus) deck screws. This seems to work well. We installed screws every two feet or so along both sides into studding,firebreaks and sheathing. Is this appropriate? Can I use batten strips that are thinner and use one screw in the center every two feet along the batten length? I plan to use a semi-transparent stain this time. Any info to confirm or correct this method would be appreciated. Any other ideas? Thanks.