ISOBOARD^Ž is placed on top of the waterproofing membrane on the concrete slab.

Advantages:

-	ISOBOARD^Ž protects the concrete slab and waterproofing membrane from thermal shock.
-	Does not absorb water and therefore acts as an effective thermal barrier.
-	Is resistant to ageing
-	Is resistant to rotting.
-	ISOBOARD^Ž has good dimensional stability and good compressive strength (live loads on the correct protection layer does not damage foam board structure).
-	ISOBOARD^Ž retains thermal resistances superior to any other foam insulation product.

Common applications:

-	Flat roofs of high rise hotels & offices.
-	Balconies.
-	Wine Cellars.
-	Domestic houses, Shopping centres and parking garages.

A	Paving bricks
B	Sand
C	ISOBOARD^Ž Insulation
D	Waterproofed concrete slab

How is ISOBOARD^Ž installed in an inverted roof application?

-	ISOBOARD^Ž should only be laid over acceptable quality waterproofing membranes, which must be laid strictly in accordance with the manufacturer's instructions and design details. The recommendations of SABS 02 should be followed.
-	In instances where ISOBOARD^Ž is to be laid over existing membranes, these should be thoroughly checked. Localized defects in membranes, which are in otherwise good condition, should be repaired.
-	Rainwater outlets should be dual level, capable of accepting water from both tops of insulation and membrane levels. Verges and upstands, including rooflight kerbs, should be high enough to contain the insulation and loading layer. Existing roofs should be modified where necessary.
-	Concrete paving slabs should be laid over insulation in areas or roofs subject to foot traffic, for example, walkways to lift motor rooms. The slabs should be raised slightly off the insulation to facilitate drainage. This may be achieved by laying slabs on proprietary spacer pads or alternatively on a bed of pea gravel spread over a water permeable fabric.
-	Joints between boards should be tight and no air gaps must occur between boards and verges, upstands, including rooflight kerbs and around services which perforate the roof deck.
-	Loading in the form of gravel ballast or concrete paving slabs should be applied to the ISOBOARD^Ž panels. The amount of loading required, should be the greater of that required, to resist flotation or wind uplift, as required according to Agrément tables. Loading tables are available on request.