Is this possible with the existing siding already there.
													
																	How to install j channel after siding. 
									
	
		
	
																	Longer than the width of the window. 
																	How to install j trim on steel buildings. 
																	Attach the j trim along the line that will form the upper edge of the metal siding. 
																	Nail the j trim horizontally along both sides of any interior corners. 
															
													
									
	
		
	
																	Install lengths of j channel along the inner edge of the fascia. 
																	Nail j channel pieces under the fascia. 
																	You have to wrap the window with vinyl j channel to divert water and to cover the ends of the siding photo 9 you ll probably have to buy new strips for this. 
																	Cut a tab in the bottom of the side j channels and fold under. 
															
													
									
	
		
	
																	Even if i somehow put the new j channel over the original j for cosmetic purposes only that would suffice for me. 
																	The j channel will conceal the cut edges of the soffit lengths and will provide a watertight seal. 
																	Square corner j channel installation. 
																	With the siding clipped and ready push it into the utility channel until both the top and bottom of the siding engage with a reassuring click. 
															
													
									
	
		
	
																	Mark out a notch 1 in. 
																	The metal siding will slide into the j trim so. 
																	Thanks for any advice. 
																	We would ve liked to put 3 j channel to give the windows a bolder look. 
															
													
									
	
		
	
																	At an interior corner the siding. 
																	Cut a section of new j channel 2 in. 
																	To finish gable ends trim the gables with j channel. 
																	Your nails should be centered in the channel slots and the nail heads should remain 1 32 to 1 16 inches 0 7938 to 1 6 mm out. 
															
													
									
	
		
	
																	Almost all of my windows have standard j channel that doesn t protrude very far.