Mark them by using pencil and cross out the lines drawn by wrong choice.
if you would like you can tale this run all the manner in which across the roof structure. This is generally especially true as long as the roof is not extremely recent. For you will now to possess to add the roofing felt.
DISCLAIMER: DMOZing.com is not affiliated in any way, shape, or form with DMOZ, AOL, Netscape, their management, entities or their official websites. Links to external websites on this website does not constitute endorsement.