Roofsaver Insulated System
The Roofsaver Insulated Systems is versatile, lightweight and extremely durable to ensure long-term performance with a minimum of maintenance. This system is generally used in new construction and re-roofing where complete tear-offs are necessary. A complete tear-off is necessary when the amount of saturated insulation in an existing assembly is significant enough to make it inefficient to simply cut out and replace wet areas and install the Roofsaver Restoration System. The Roofsaver Insulated System is also ideal for thermal upgrades. When designing any new assembly, consideration must be given to a number of factors including budgets, thermal efficiency, weight loading, wind uplift and the projected life cycle costs of the system. Although IWS has designed and installed thousands of assemblies over the years, we still begin each project at square one. Even when two buildings are exactly the same, the needs of the client may not be. This approach guarantees a successful installation and a satisfied client.
RS Heat Shield
RS Heat Shield is a white coating applied to the RS Wearing Course component of Roofsaver assemblies. The coating is highly reflective thereby minimizing ‘solar gain’ or unnecessary warming of the air conditioned interior space of the building. Buildings with RS Shield will have substantially lower energy costs than an identical building with any other finish system including gravel, mineral surfacing or aluminum paint. Not only does RS Heat Shield reduce your energy costs, but it also helps reduce the “Urban Heat Island Effect”.
RS Wearing Course
RS Wearing Course is an SBS rubberized asphalt membrane designed to embed in RS Base Hot Rubberized Asphalt. Its flexibility means it will move with the waterproofing layer below it without cracking like non-modified membranes will. It is lightly sanded top surface provides an excellent substrate to on which to apply RS Heat Shield.
RS Base Hot Rubberized Asphalt is a monolithic, self-healing and liquid applied membrane. The membrane is heated at ground level in a specially designed melting kettle and applied to the substrate using a squeegee like applicator. This ensures there are no voids in the membrane system. It is applied in two monolithic costs separated by RS Reinforcing Fabric. Applying the system in this manner provides two truly monolithic layers of protection at all projections and flashing details.
RS Reinforcing Fabric
RS Reinforcing Fabric is spun-bond polyester scrim sheet designed for use with Hot Rubberized Asphalt Systems.
Overlays are used to protect certain temperature sensitive insulation from RS Base during installation. Overlays are not required in every assembly. When an overlay is required IWS will use an asphaltic board type overlay. There do not wick or absorb water, break down or rot, and are dimensionally stable.
Insulation type can vary. The most common insulation used in conventional roofing is Polyisocyanurate. It offers the highest R-value per inch, high compressive strength, and is available in a wide variety of thickness and size. It can be mechanically fastened or adhered depending on the project.
Vapor Retarder’s are used to prevent drive into the insulation layer of the roof assembly. Vapor drive is caused by a number of factors including but not limited to solar gain, positively pressured interior space and the ‘stack effect’. The presence of a good quality vapor barrier in the assembly will help insure that warm interior air does not enter the roof assemble from the underside of the structural deck and condense in the assembly as it reaches the dew point.
Steel deck may require a thermal break over top of it to meet the local building fire code. In this case gypsum board would be installed directly to the structural deck prior to the other components of the assembly being installed. The Roofsaver Insulated Assembly can be installed over a wide variety of deck types including plywood and wood plank decks.