2 in a metal roof.
													
																	Roof apron definition. 
									
	
		
	
																	Apron flashing a one piece flashing such as is used at the lower side of a chimney that penetrates a sloping roof. 
																	1 cap or cover. 
																	Apron definition a garment covering part of the front of the body and tied at the waist for protecting the wearer s clothing. 
																	A strip of wood usually set in or over the structural deck used to elevate and or attach a primary roof covering such as tile. 
															
													
									
	
		
	
																	4 in a membrane roof system. 
																	A narrow plastic wood or metal bar which is used to fasten or hold the roof membrane and or base flashing in place. 
																	A metal closure set over or covering the joint between adjacent metal panels.