I'm currently interviewing contractors for exterior basement waterproofing. The difference in price is not significant, but there is one major difference.
The contractors will:
- Trench down below the footings,
- Parge the foundation
- Apply AquaBlock Rubberized adhesive sealant.
- Contractor A will apply an 11 mil plastic membrane here.
- Apply Dimple board.
- Weeping tile replacement etc.
Generally I am of the opinion that more stuff means a better job, but I need an opinion as to the 11 mil plastic. Is it
a) Harmful, b) irrelevant, or c) beneficial?