Installing Exterior Window Trim Over Aluminum Siding

Typically aluminum is not used anymore to reside residential homes so the siding needed to be special ordered.

Installing exterior window trim over aluminum siding.

Instruction on how to install exterior 2x4 trim around a new or old window. If the trim is being applied over the hardi panels. The wrb is lapped over the head flashing or the flashing is taped. The client had a tight budget and just wanted to patch in new siding to match the existing siding.

Nail it at 12 inch 30 48cm increments. When installing the trim at the windows start at the bottom then move to the sides and install the top portion last. Before you replace the siding cut and install new j channels to prevent water from leaking into your home. After you have placed the flashing and waterproofing you will need to butt the siding up to the edges of the window.

This will help control water flow and prevent leakage. The head flashing is installed in a bed of caulking onto the top of the window frame. On this particular job the home already had aluminum siding. The cement board panels are fastened to the battens.

The rain screen battens are run down to the top of the window flange. If possible you can simply remount the.