Carpet grade stairs

There are many types of Carpet grade stairs. Most common type is the closed tread. These have 250mm x 40mm Pine Stringers that run down both sides of the stair. Then there is the under stringer stair. Also known as a saw tooth stair. This type of stair does not have the stringers visible from the top. Carpet grade stairs generally have a 25mm nose on the treads. But some people prefer the raking riser. The treads and risers can be made from either Triboard which is strand board with MDF on either side, Or Plywood. Both have their own benefits. Triboard is stiffer, heavier and slightly cheaper. Plywood is a lot lighter making it easier to install.