Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy.
													
																	Slope roof into sq ft. 
									
	
		
	
																	So continuing our example if you ve got a two story house with a total square footage of 2 700 square feet with each floor having 1 350 square feet multiply 1 350 by 1 0541 to get 1 423 square. 
																	A roof with a 6 rise for every 12 run has a 6. 
																	Get your roof size by using this roof pitch calculator. 
																	Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. 
															
													
									
	
		
	
																	As an example if your overhang is 12 inches you ll add 2 feet to the overall length and 2 feet to the overall width of the house. 
																	And for a roof with a slope of 6 12 that number 1 118 is your roof slope multiplier. 
																	Take the area of the roof s footprint say it s 5 000 square feet and multiply 5 000 by 1 118. 
																	Roof is 6 12 pitch and measures at 2 400 square feet. 
															
													
									
	
		
	
																	So 2400 x 1 12 2 688 2 88 sqs added for pitch. 
																	Multiply the roof length by the gable wall length 40 24 960 multiply this amount by the slope factor 960 1 1180 1073 28 the area of this roof 1073 3 sq. 
																	The roof pitch is important in determining the appropriate installation method and how much roofing material will be needed. 
																	And that s the number you were looking for.