The team are currently working on this detached basement garage below external ground levels in Sheffield. Our client wishes to use this area as habitable space. We have recommended a Type A barrier system for the concrete floor and a Type C cavity drain system for the walls.
So far we have treated the floor involving:
Priming the floor by applying Koster Polysil TG500.
Applying two coats of Koster NB1. This is a mineral waterproof coating that contains crystallising and capillary-plugging agents.
Mixing the Koster VAP I 2000 Part A and Part B with a resin stirrer and apply over substrate
Installing Koster SL Premium Self-Levelling Compound
This internal bunded system involved installing engineering bricks as part of the design. We placed these at approximately 100mm away from the wall on the retaining walls. The team installed a drainage channel on the earth-retaining perimeter walls. This included jetting eyes and inspection ports and discharges into the existing drainage.
Walls: The cavity drain P8 (8mm) membrane would be mechanically fixed to all walls (floor to ceiling). If insulating in front of the wall membrane a vapour control layer we will include a condensation strip because this will prevent interstitial condensation.