This is a cove style exterior siding.
Cove siding profile.
The deep shadow line is made by a bevel cut into the top edge of the horizontal board.
The siding is treated using a preservative system based on organic biocides.
In the right hand profile in our sketch you can see the most common simple cove cut at the top of this siding board.
It has been enhanced by a two coat primer system.
This treated product is safe for indoor use as well as exterior above ground only.
Click to enlarge any image.
Shop cove dutch profile boral shiplap siding 1x8 16 ft at taylor forest products with its long curved lower profile dutch lap gives homes a sophisticated look that makes a statement.
Boral shiplap specifications boral shiplap siding shiplap products.
Cove cut lap siding also widely referred to as drop siding though in fact the term drop siding.