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Any holes through the vapor barrier installed over the basement floor slab are thoroughly sealed as part of the foundation water barrier system.
Right - This rigid insulation is correctly installed in a level layer over aggregate; the seams will be taped
Right – Workers lay radiant floor loops over the concrete reinforcement which is laid over a heavy vapor barrier installed over the sub-slab insulation before the slab is poured.
Right – Workers pour the concrete for the basement floor slab over a vapor barrier installed over rigid foam.
Right-Polyethylene sheeting is correctly installed over aggregate and taped to pillars and foundation wall
The builder’s crews spray foam directly onto the ground to provide a vapor barrier and insulation layer under the slab.
This Texas homes uses a slab foundation including a 4-in.-thick post-tensioned monolithic slab with turned-down edges poured over a 6-mil polyethylene vapor barrier and capillary break; slab edge insulation is not used due to termite risk.
Wrong - Polyethylene sheeting should be lapped up sides of walls and pillars and taped