How Should The Corner Moldings On Aluminum Siding Be Installed

The cement board panels are fastened to the battens.

How should the corner moldings on aluminum siding be installed. The rain screen battens are run down to the top of the window flange. How to install individual aluminum siding corners of hardie plank siding. If the trim is being applied over the hardi panels. Instruction on how to install exterior 2x4 trim around a new or old window.

End caps are very easy to replace. Under the window frame use undersill general purpose trim cut to extend 25 mm 1 beyond the width of the window at either side. Foam board is the most commonly recommended underlayment application for aluminum siding. Measure overall height and width of each door or window frame.

3 add the corner posts. Furr out undersill trim to maintain the proper pitch. The head flashing is installed in a bed of caulking onto the top of the window frame. We need air circulation behind these boards and the opening acts as a water exit should water ever go behind the boards.

Window and door trim apply trim around door and window frames before installing siding panels. This works fine most of the time but always add a few blobs of caulking inside the bottom lip of the top course for extra security. The way to allow for this expansion is to install the corner post down from the soffit or top of the corner. In the old days the builder would install the trim bring the siding up to it and caulk the corner.

Nailing each corner should be hung straight so drop a plumb line for each corner post. On most new homes the trim goes up after the siding is installed which creates a large gap that should not be caulked. The most common approach here is to install sill trim at the soffits rip down the top course of siding and crimp the siding so the sill trim holds it in place. Install each sheet with nails laying every sheet straight and being sure to leave no gaps between the sheets.