Ground Floor Construction
Original 6M ground floor slab construction generally comprised:
- 150mm lean-mix concrete slab on prepared/levelled base; with "floated" finish
- hot-laid liquid bituminous damp proof membrane poured and brushed over lean-mix base
- building/slab perimeter set-out and formed in precast standard concrete kerbs, 100mm wide with bullnose profile, and with continuity of DPM formed by local "Bituthene" dressed over kerb and lapped with brushed DPM
- final structural slab in mesh-reinforced insitu concrete with power-floated finish, 150mm thick. This is levelled to the top of the perimeter kerbs.
The power-floated finish allowed screeds to be dispensed-with. Sheet floor finishes (vinyl or carpet) are bonded directly to the slab, with grinding and local latex levelling if required in preparation. Generally, no services are run within the floor construction.
Some local exceptions apply to this general floor construction, including:
- major structural movement joints
- local "bay" joints in the power-floated slabs, formed by inset plastics crack-inducers
- specific local services, such as floor-recessed pivots or powered closers, e.g. to fire doors on automatic release
- recessed floor construction, e.g. to form falls to shower enclosures
The perimeter ground slab construction directly supports the external wall construction.
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