BALCONIES, TERRACES AND ACCESS DECKS
Falls must be provided to balconies and terraces to enable water to flow from the building. In all cases thresholds should be placed 150mm above the horizontal area to enable an asphalt skirting, turned into a chase at the top, to be formed to prevent the ingress of water. Work to handrails, gutters and outlets should be in accordance with details given previously, click here for details.
Where asphalt is required as a paving to be exposed to the weather and subjected to foot traffic, it is laid in two coats. The first coat is laid to a nominal thickness of 10mm in roofing asphalt and the second coat 15mm in the same roofing asphalt incorporating an additional 10% to 15% by weight of 3mm coarse aggregate (Fig. 1.48).
Where point loading is anticipated the surface should be tiled (Fig. 1.49).
Compressible insulation must not be used under Asphalt on balconies and terraces. A protected membrane system with paving slabs forms a suitable specification for insulated balconies. Alternatively Asphalt laid over Cellular Glass or cork/polyurethane composite insulation and protected with promenade surfacing can usually be considered.
BALCONIES AND TERRACES
ACCESS DECKS AND PODIA
Three coat asphalt roofing is an ideal water proofing material for buried systems such as roof gardens.
When designing a roof garden to receive mastic asphalt the following principles should be followed.