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Resin Bound Knowledge Base

Resin Bound Knowledge Base

Information - Steps

Resin bound stone can be applied to both the surface and face of steps using a shuttering method. This requires a solid surface (usually a wooden board) secured at a set distance from the uprights to act as a mould casing.

Any edges of the shuttering that will be in contact with the resin should be either covered in a polypropylene sheet or coated in a light application of Petroleum jelly to prevent the cured resin adhering to the shutter. The absolute minimum width of the upright resin surface should be 30mm (typically 50mm) and this should be compacted to refusal in intervals of approximately 100mm depth.

Resin Bound Steps
Installing resin bound steps

The shuttering boards should be cut at an increased height which allows for the depth of the resin to be applied to the tread (horizontal) surface of the step. It should be noted that on a single step is it possible to do both the vertical (uprights) and horizontal (treads) surfaces in a single installation however if there are two or more steps the it will be necessary to complete the vertical surfaces first and the horizontal surfaces after the shutters are removed from the vertical surfaces. The shuttering which covers the front face of the second step will prevent the surface of the first step being covered.

Resin bound step nosing
Resin bound step edging

The front edge of each completed step is the weakest point, most likely to be damaged and with certain aggregate blends it can result in a sharp edge. We recommend the use of a non-slip,  aluminium step nosing trim as this will protect the edge and can result in a very neat, clean finish.