Clean corners for manufactured siding
I’ve been installing a lot of nonwood sidings over the past few years, such as cement-based and hardboard lap sidings. To complement the clean look of these sidings, I’ve taken to installing custom-made steel corners. As shown in the drawing, the corners have flanges that are nailed to the wall and act as integral flashings in case any moisture gets behind the siding. The siding abuts the projecting corner of the metal trim details.
I have a local metal shop make the corners from steel gutter stock. This material is inexpensive and comes in brown, white or primer. The steel corners hold paint beautifully.
Before I started using these corners, I used cedar corner boards. They would eventually shrink, leaving a cracked caulk joint. That problem is a thing of the past with the steel corners.
Richard Darby, Merlin, OR