Cedar Siding Corner Flashing

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

Cedar siding corner flashing.

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. Edge strip for corners. Building siding flashing finish details for building corners. Flashing should be made from a non corrosive material and should extend a minimum of 2 vertically up the wall.

These siding corners provide both stability and protection while giving a seamless look to hardboard siding. Width is a matter of taste and proper proportion. The 122 series corners are also available in copper or stainless steel by special order only and available in a wide variety of lengths and flange widths to cover most styles of wood siding. Otherwise it is possible for water to wick up the shingles and into the wall.

This aluminum trim is a great choice for siding corners lightweight yet durable. Face width 1 3 4 per side at the bottom tapering to 1 1 4 at the top. The most common are 3 4 inch or 1 1 4 inches thick. Cedar shingle siding must never rest on the horizontal surface of flashing.

The base of this outside siding corner is 1 11 16 wide from center to outside edge. Use overlapping 1x4s or 1x6s at outside corners or use 5 4 stock for a heavier look. This aluminum corner is for hardboard siding measuring up to 1 2 thick. 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.

Flashing must be overlapped by the moisture barrier. 122 series corners are designed primarily for wood siding.