# Non Durable Surfaces exposed to water ### Issue Image: ![[Bad Wall.png]] ## Issue Description: - Non Durable surfaces below external windows, anything external should ideally be render, brick or concrete. (this refers to wintergardens which can be left open - When sliding doors are left open, these can become damaged by water. - see also [[Wall Finishes in Wintergardens]] ## Actions to Prevent this Issue: - [ ] Where possible, Architect shall check that any surfaces which might be exposed to water are water resistant, don't use PB unless it can be helped ## Source - MIL356