You then have rafters running down from this ridge board and resting on the top wall plates.
													
																	Roofing with 2x4. 
									
	
		
	
																	For roofs that won t experience heavy snow loads a gable roof can span up to 22 with 2 4 rafters. 
																	The back of the roof will attach to house with 16 2x4 and lag screws. 
																	Front and sides will sit on deck on a 2x4 wall with studs 24 oc and screened in. 
																	Sometimes the rafter will have a tail and extend out past the wall so that you have a soffit or overhang. 
															
													
									
	
		
	
																	He says lowes told him he could use 2x4 for rafters with 1 2 inches plywood for asphalt shingles. 
																	Tin roofing also known as metal roofing is considered more durable than composition or wood shingles. 
																	If you have a simple gable shed roof then using 2 4 rafters makes more sense unless you have a very large shed. 
																	I told him plywood and asphalt shingles would be too heavy. 
															
													
									
	
		
	
																	The rafters are 18 foot long without beams or trusses garage 28x40. 
																	For example if your roof measures 10 feet 3 0 m x 10 feet 3 0 m and the slope of the roof is 12 12 giving a slope factor of 12x12 12x12 12 converts to 1 414 in decimal form you would multiply 10 x 10 x 1 414 to get the total of 141 square feet of roofing. 
																	He s already got the 2x4 up for rafters and it s ready for laying plywood tomorrow. 
																	For roofs that will experience heavy snow or wind and will span the same distance use 2 6 rafters. 
															
													
									
	
		
	
																	Installing wood stripping under a tin roof.