Cedar Siding Corner Flashing

Siding corner is primed white and has a wood grain surface.

Cedar siding corner flashing.

This aluminum corner is for hardboard siding measuring up to 1 2 thick. Flashing must be overlapped by the moisture barrier. This aluminum trim is a great choice for siding corners lightweight yet durable. Cedar shingle siding must never rest on the horizontal surface of flashing.

Otherwise it is possible for water to wick up the shingles and into the wall. 122 series corners are designed primarily for wood siding. The most common are 3 4 inch or 1 1 4 inches thick. Use a felt paper spline wrapped around the corner and extending 6 inches beyond the corner board to protect the joints where the siding meets the corner boards see figure 1 5 at left.

Width is a matter of taste and proper proportion. Use overlapping 1x4s or 1x6s at outside corners or use 5 4 stock for a heavier look. Edge strip for corners. Thickness of the corner board will depend on the thickness of the siding.

Building siding flashing finish details for building corners. Face width 1 3 4 per side at the bottom tapering to 1 1 4 at the top. Corner boards are applied to the sheathing with siding fitting tightly against the narrow edge of the boards allowing for expansion and an adequate caulking bead. Outside aluminum siding corners in different sizes.

The base of this outside siding corner is 1 11 16 wide from center to outside edge. Flashing should be made from a non corrosive material and should extend a minimum of 2 vertically up the wall.