Protection of timber flooring substrates (ply, particle board, OSB, or Mass timber such as CLT) during construction.

B2 DURABILITY:
- Performance clauses B2.3.1 (a): Building elements must, with only normal maintenance, continue to satisfy the performance requirements of this code for the lesser of the specified intended life of the building, if stated, or:
(a) The life of the building, being not less than 50 years, if:
(i) Those building elements (including floors, walls, and fixings) provide structural stability to the building, or
(ii) Those building elements are difficult to access or replace, or
(iii) Failure of those building elements to comply with the building code would go undetected during both normal use and maintenance of the building.

E2 EXTERNAL MOISTURE:
- Functional requirement clause E2.2: Buildings must be constructed to provide adequate resistance to penetration by, and the accumulation of, moisture from the outside.
- Performance clause E2.3.4: Building elements susceptible to damage must be protected from the adverse effects of moisture entering the space below suspended floors.

F2 HAZARDOUS BUILDING MATERIALS:
- Performance clause F2.3.1: The quantities of gas, liquid, radiation or solid particles emitted by materials used in the construction of buildings, shall not give rise to harmful concentrations at the surface of the material where the material is exposed, or in the atmosphere of any space