Heritage Collection's own manufacture Oak stair cladding system designed to create the look of a solid Oak staircase, from your existing flight, by providing Oak treads and risers to bond into place over your existing ones.
Oak Extension boards are used to add to the rear of a tread pack - each extension pack will add 142mm to the back of the tread pack (284mm itself). These are usually used on a quarter landing (a quarter landing will usually need 1 x tread pack and 4 x extension boards).
The extension boards are 15mm thick and are made using American White Oak. The boards are available in a 1000mm width.