When you find the center of the bottom edge of the shed roof you can place a shingle on each side of the central point.
How to put shingles on a slanted roof.
Known in the trade as vertical racking or staggering this how to lay shingles method enables the roofer to install a single column of shingles all the way to the peak without the wasted back and forth motion necessary to fill several rows of stair steps.
If the gap allows you to put another course of shingles then do it.
Use the chalk line to snap a straight line vertically every 6 inches.
Once you have done this align the bottom edge of each shingle with the bottom edge of the starter roll.
Cover the entire low sloped roof area with an sbs membrane cemented at the vertical laps.
Every 5 inches make a new mark until you get to the rop of the roof.
Repeat this on both sides of the roof.
If there is only a little space left then you re fine and don t have to lay another row yet.
Many pros shingle in a vertical line up the roof because it s much faster.
Ideally the top edge of the last shingle row is flush with the top edge.
Secure the last ridge cap shingle with four nails at the corners of the shingle and cover the nail heads with roofing cement.
Install your shingles to the top edge of your lean to roof.
Lay the last ridge cap shingle in the center of the shed roof on top of the exposed adhesive portions of the two center ridge cap shingles.
Nail the shingles in place.