PlastiSpan® insulation board can be used in combination with most types of single ply membranes. Single ply roofing systems offer the advantages of rapid installation and lightweight construction.

Proven Performance
Various single ply roof assemblies incorporating PlastiSpan insulation board have been tested for compliance with requirements for fire rated roof assemblies. These roofing systems have many years of proven performance in both new and maintenance roof construction.

Plasti-Fab’s EPS insulation is an excellent choice for roofing applications due to its long-term thermal resistance and performance qualities. With R-values ranging between 3.75 per inch to 4.7 per inch depending on the product used, it is a cost-effective thermal insulation that provides increased energy efficiency within the structure.

Installation Methods
Single ply roofs may be installed loose laid and ballasted, fully or partially adhered to the substrate, or mechanically fastened. Installation can be over a single layer of flat or sloped PlastiSpan insulation or multiple layers of insulation to provide any thermal resistance required. The attachment of the insulation will be influenced by the base requirement of the single ply membrane to be installed.

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Durofoam Insulating Under a Basement Slab

1. Follow the Building Code

Be sure to follow the building code requirements applicable in your region.

Durofoam Insulating Above a Basement Slab

2. Moisture Barrier

Place & level a layer of granular fill. Place a 6-mil polyethylene moisture barrier over the granular fill.

Durofoam Insulating Under a Basement Slab

3. Place Insulation

When placing the insulation ensure that the joints are tightly butted together. (HINT: Ensure all openings are planned in advance.)

Durofoam Insulating Above a Basement Slab

4. Place the Concrete

Place the concrete using normal construction methods and equipment.

Next Steps


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