The exposed insulation and air barrier membrane are susceptible to damage during construction and should be carefully monitored and protected until they can be permanently covered.

A major factor in the long-term performance of the floor assembly for moisture penetration control is the use of a properly installed and well-maintained below-grade drainage system. When using rigid mineral fibre it is crucial that the assembly has an effective drainage system and that the insulation does not get wet.

Soil gas/ radon protection may be required by the BCBC depending on the location of the building. The use of the polyethylene and an additional layer of gravel below the insulation layer will create a sub-slab depressurization system and meet the BCBC requirements.