That removed all blocks from the block list except for '0.5-tab' shingle block (a block of a small piece of a '3-tab' shingle).
There are 54 '3-tab' shingles in each of the two drawings.įollowing your suggestion, I copied (crtl + C) and pasted (ctrl + V) the shingles, the tar paper and the roof sheathing to a new file (Involves seven layers).