First Fix involves the structural work (roof struts, wall studding, framing and joists etc) and Second Fix refers to the finishing work, which is usually done after the plastering.

What is meant by 1st fix?

First fix (sometimes described as shell and first fix ) is a short-hand term used to describe the processes that are undertaken during construction works up to the point of applying internal surfaces – typically plaster.

What does first fix stage mean?

First fix during your house build refers to the work carried out after the building has been made watertight, and before plastering internally.