Dry Rot, Launceston, Tasmania Dry Rot April 18, 2014 admin In this example, the owner’s freezer and bed had fallen through the floor. Due to the lack of ventilation in the sub-floor area, all supporting timbers had failed due to “dry rot”. Photos of different stages of the job are shown below. Existing floor with preparation holes cut and supports put in place prior to removing floor. Removal of floor, with internal walls totally supported. Completion of first concrete pour. Preparation for final concrete pour. House back to normal with a new concrete slab.