https://amzn.to/2f2pooO This saw is perfect for this job.
https://amzn.to/2dl334i Click link to get a great tool for this layout process. The guide that comes with this square walks you through how to use the tool for determining existing pitch, cutting birdsmouths, and stucturing your roof. Also Amazon sells Brass square gauges that lock to your square for laying out stairs and roofs.
How to layout roofing rafters. How to lay out roof rafters. How to calculate the length of roof rafters using a framing square. Disclaimer:
Doublewide6 has a Master’s Degree in industrial technology with a specialization in Manufacturing, due to factors beyond the control of Doublewide6 and anyone featured in his videos, I cannot guarantee against improper use or unauthorized modifications of this information. Doublewide6 assumes no liability for property damage or injury incurred as a result of any of the information contained in this video or any of Doublewide6’s videos. Use this information at your own risk. Doublewide6 recommends safe practices when working on equipment, power tools, chemicals, electronics, electrical systems, vehicles, and or with tools seen or implied in this video. Due to factors beyond the control of Doublewide6, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not Doublewide6. Please support Doublewide6 by donating to his Patreon Account https://www.patreon.com/doublewide6