The caulking mentioned is fine to seals the gape but you may need somethingto back it other thatn backer rod. in that case you may need a small amount of Rockwool insulation to pack into the void befo ... read more
Who made then the design change decission? Was it you that changed something and the seat was dropped due to the change? Or was it initiated by the builder? Did something else change that necessitated ... read more