Viking Epiclad FBS (fleece-backed system) is a single-ply waterproofing membrane system made from EPDM rubber polymer, with a polyester-fibre matt fleece underside (which assists bond to substrate).
Epiclad FBS is 2.5mm thick and supplied in roll form. It is highly resistant to UV, ozone and weathering. The fleece-back provides high-impact and extra puncture resistance. It possesses strong elasticity, tensile and elongation properties - a timber building's substrate will flex and move, especially during seasonal change. Epiclad FBS will not tear under this kind of movement. It is known as its 'elongation at break' property (480%); it copes significantly better than other membranes under equal stress.
Epiclad FBS is ideal for overlaying most old roof surfaces, preventing the dumping of the old roof and exposing the building's interior as the roof is replaced.
Epiclad FBS has wide-sheets, so it is ideal for more open areas, such as expansive roofs, waterproofing under decks, balconies, parapets, gutters, pond liners and reservoirs. It is useful in areas with irregular angles, curves and contours as it is very pliable and can readily mould to difficult designs and shapes. It is suitable for both inland and coastal environments.
The wide-sheets mean fewer seams on the roof - increased waterproofing integrity. Epiclad FBS is potability certified - drinking water can safely be collected off an Epiclad FBS roof.
BRANZ Appraised (No. 307, 2013). Backed by a 20-year product warranty, and project depending, may be eligible for Viking's Full System Warranty, which covers the product and installation warranties in one document. It is available in black (white available on indent). Epiclad FBS is 2.5mm thick, and its rolls are 15.2m long and 3.0m wide. It can be painted with approved paint systems - design flexibility. It is manufactured in the USA by Carlisle Syntec Systems Inc. - the USA's largest EPDM sheet rubber manufacturer.
Scope of use
Viking Epiclad FBS has been appraised for use as a waterproofing membrane for buildings within the following scope:
- Scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1; and,
- With timber supporting structures designed and constructed in accordance with the NZBC; and,
- With nominally flat or pitched roofs constructed to drain water to gutters and drain outlets complying with NZBC; and,
- With substrates of plywood sheet.
Viking Epiclad FBS has also been appraised for use as a waterproofing membrane for external reinforced concrete and plywood roofs and decks for buildings within the following scope:
- Up to 3 storeys with a maximum height from ground to eaves of 10m and with a floor plan area limited only by seismic and structural control joints.
New Zealand Building Code (NZBC)
The product will, if employed in accordance with the supplier's installation and maintenance requirements, assist with meeting the following provisions of the building code:
- Clause B1 Structure: Performance B1.3.1
- Clause B2 Durability: Performance B2.3.1, B2.3.1(b)
- Clause E2 External moisture: Performance E2.3.1, E2.3.2
- Clause F2 Hazardous building materials: Performance F2.3.1
The product has and can make available the following additional evidence to support the above statements:
Product specification and incorporation of Viking Epiclad FBS Membranes into the building design shall be carried out by a designer/architect/engineer or a building professional who:
- Is qualified to design the buildings covered under the 'Scope' of use of this product.
- Has ready access to the technical specifications including installation details and standards referenced in the BRANZ Appraisal No. 307 (2013) where the design limitations are outlined for the scope of this PTS.
The Viking Epiclad FBS system comes with a range of accessories including sumps, scuppers and overflows. Click here for a full range of Epiclad FBS accessories.
Installation shall be carried out by a Viking Roofspec licensed installer. Installation shall be undertaken in accordance with all relevant technical information related to the selected installation method, including information contained within the BRANZ Appraisal No. 307 (2013) and Viking Roofspec Rubber Applicator Handbook, version 1.1 (17/07/2013). Long term properties of the material may be affected by contact with petroleum-based products such as oils, greases and solvents.
Aside from regular roof inspections to keep drains clear, no maintenance of the membrane is normally required provided significant substrate movement does not occur. In the event of damage to the membrane, the membrane must be repaired by removing the damaged portion and applying a patch as for new work using lap tape.
Viking Epiclad FBS is backed by a 20-year product warranty. For specific projects, Epiclad FBS can be eligible to be covered by Viking's Full System Warranty. This warranty covers the product and installation in one document.
Epiclad FBS can be applied over the existing roof surface saving uplift and dumping of the old roof materials. Epiclad FBS has a potable water certificate - drinking water can be collected off an Epiclad FBS roof.
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