Well, they are correct. White wood is not very strong. Yellow pine is used in pallet mfr in many areas. Might check on that. Around here their 1x's make great skip sheeting and are considerably cheaper than dimensional.
Roofing Talk - Professional Roofing Contractors Forum
A forum community dedicated to professional roofers and enthusiasts. Come join the discussion about the industry, safety, finishing, tools, machinery, projects, styles, scales, reviews, accessories, classifieds, and more!