Are the Vinyl Fins on the Basement Products Nailing Fins?
No. The fins along the sides of the window are for new construction sash block installation. The notched fin along the bottom is designed as mortar grab once the mortar wash is applied. The sash block fins can be scored and removed for replacement window applications. It is important to leave the mortar grab fin in place at the bottom even in replacement applications. Please note, the mortar grab fin may be removed under particular new construction and replacement applications.
