Originally Posted by
valleyquiltermo
Your backing should be about 90" wide by 108" long, so it will take wide 42 x 2 + 9" = 90"
Long 42 x 2 + 27" = 108 wide (all with 1/2 inch seams.)
I hope this helps.
Welcome from Mid Missouri
For yardage you will need two pieces 90x42 (5 yards) PLUS one piece 90 X 24 (108-84) (2.5 yards) for a total of 7.5 yards. Piece horizontally because of the way you are cutting the pieces.
Welcome from Texas.
Linda