J channels are used around windows and doors on inside corners and where the siding meets the soffit or roof at an angle.
													
																	Vinyl siding j channel sizes. 
									
	
		
	
																	In the case of the former two the vinyl siding institute suggests inserting an uncut panel into a j channel measuring 3 8 of an inch. 
																	This will help keep the track dry and prevent accumulation of unwanted moisture. 
																	Most vinyl siding manufacturers make two or three sizes of j channel. 
																	J channel siding will need to be measured accurately to allow for proper installation. 
															
													
									
	
		
	
																	With the j channel you can trim like the pros making your vinyl siding work look seamless. 
																	For vertical siding install j channel trim. 
																	Simply slide the siding panel into the folded j channel. 
																	Siding manufactures differ in their recommendations regarding the spacing of the holes and the size. 
															
													
									
	
		
	
																	If the top is mitered miter the sides as well. 
																	Use the versatile malco j channel cutter to make drain tabs downstream notch cutouts and miter trim cuts in vinyl channel. 
																	Available in three sizes for 1 2 inch 12 7 mm channel using model jcc50r 5 8 inch 15 9 mm channel using model jccr and 3 4 inch 19 1 mm channel using model jcc75r. 
																	Georgia pacific j channel clay 0 625 in x 150 in vinyl siding trim. 
															
													
									
	
		
	
																	I see that the j channel comes in 1 2 inch and 5 8 inch. 
																	Nail every 12 inches on center. 
																	J channel and dual undersill are important pieces of siding that need to be installed before a person can install the larger siding pieces. 
																	For horizontal siding install f channel trim at the soffit and gable rake. 
															
													
									
	
		
	
																	Item 6555 model 329058. 
																	Page 28 of the vinyl siding institute s installation manual is. 
																	I m about to install 10 vinyl soffit and horizontal siding on my garage. 
																	J channel siding is used to finish the ends of vinyl siding around doors windows and on corners it gets its name from the j shape it has when looking down from the top of the piece. 
															
													
									
	
		
	
																	For vertical siding these channels typically have openings of 3 8 inch to 1 2 inch to receive siding panels and soffit materials. 
																	At the bottoms of windows install under sill trim for horizontal siding and j channel trim for vertical siding. 
																	Post by brewman thu oct 09 2014 12 38 pm. 
																	1 2 or 5 8 j channel. 
															
													
									
	
		
	
																	For a corner the under sill trim can also be installed into a similar size. 
																	How do i determine which i need to use. 
																	Install trim under eaves rakes. 
																	1 4 inch weep holes should be drilled about 12 inches apart into the j channel only.