Caltech FCP

Approved for use on

Flat Roofs Green Roofs Inverted Roofs Warm Ballasted Roofs Zero Falls Buried Roofs 

Caltech FCP is satisfactory for use as a liquid-applied roof waterproofing system on new or existing roofs with limited or pedestrian access in the following specifications:

• exposed warm and cold flat and pitched roofs(1)
• protected warm and cold flat and zero fall roofs (ie covered by pavers or other suitable protection)(1)(2)
• green (extensive) flat, zero fall and pitched roofs(1)(2)
• inverted flat and zero fall roofs(1)(2).

(1) Limited access.
(2) Pedestrian access

Substrate

Concrete Glass Reinforced Polyester Mastic Asphalt Metal OSB 3 TG4(1) Plastic Reinforced Bituminous Membranes Single Ply Membranes - EPDM Single Ply Membranes - PVC Single Ply Membranes - TPO 

The system is suitable for use on the following substrates:
• concrete
• concrete screeds
• asphalt
• OSB 3 TG4(1)
• reinforced bitumen membranes (including sanded and mineral surfaced felts)
• GRP
• single-ply membranes(2)
• previously-coated surfaces(2)
• small areas of metal incidental to the roof, eg pipe upstands
• small areas of plastic-coated metal incidental to the roof(1)

(1) Grades approved by the Certificate holder.
(2) The advice of the Certificate holder should be consulted on compatibility with the system

Durability

25 Years 

The system will achieve an initial life expectancy of at least 25 years. When fully protected, and subjected to normal service conditions in an inverted roof specification with an open covering (eg aggregate pavers), the system can provide an effective barrier to the transmission of liquid water and water vapour for the design life of the roof in which it is incorporated.

Installation Requirements

The system is installed only by specialist roofing contractors who have been trained by the Certificate holder.

Fire Safety

When tested to DD CEN/TS 1187 : 2012, Test 4 the following systems achieved a classification under BS EN 13501-5 : 2005 of BROOF(t4):
• a flat roof system consisting of primed 9 mm thick calcium silicate board, a layer of Caltech FCP Universal Primer applied at 0.22 kg·m–2, one coat of Caltech FCP at 1.22 kg·m–2, a layer of 225 g·m–2 Caltech FCP 225 GFM reinforcement and one coat of Caltech FCP at 0.71 kg·m–2
• a flat roof system consisting of a primed 18 mm thick OSB3 board, a layer of polymeric adhesive primer applied at 0.15 ℓ·m–2, a 0.6 mm self-adhesive air and vapour control layer (AVCL), a 150 mm thick tissue faced polyisocyanurate (PIR) insulation board adhesively bonded, layer of polymeric adhesive primer applied at 0.15 ℓ·m–2, a 0.6 mm self-adhesive carrier membrane, one coat of Caltech FCP at 1 ℓ·m–2, a layer of 225 g·m–2 Caltech FCP 225 GFM reinforcement and one coat of Caltech FCP at 0.5 ℓ·m–2
• a flat roof system consisting of a primed 18 mm thick OSB3 board, a 300 µm polyethylene AVCL, a 150 mm thick aluminium foil faced PIR insulation board mechanically fastened, an 18 mm thick OSB3 board, one coat of Caltech FCP at 1 ℓ·m–2, a layer of 225 g·m–2 Caltech FCP 225 GFM reinforcement and one coat of Caltech FCP at 0.5 ℓ·m–2.

In the opinion of the BBA, a roof incorporating the system will be unrestricted under the national Building Regulations in the following circumstances:
• Protected or inverted roof specifications, including an inorganic covering listed in the Annex of Commission Decision 2000/553/EC,
• irrigated green roofs.

The designation of other specifications should be confirmed by reference to the requirements of the documents supporting the national Building Regulations.

In England and Wales, the system, when used in pitches of greater than 70°, excluding upstands, should not be used on buildings that have a storey at least 18 m above ground level and which contain one or more dwellings, an institution, a room for residential purposes (excluding any room in a hostel,
hotel or boarding house), student accommodation, care homes, sheltered housing, hospitals or dormitories in boarding schools.

In Scotland, the system, when used in pitches of greater than 70°, excluding upstands, should not be used on buildings that have a storey more than 11 m above ground level.

If allowed to dry, the plants used may allow flame-spread across the roof. This must be taken into account when
selecting suitable plants, and appropriate planting, irrigation and/or protection should be applied to ensure that the
overall fire-rating of the roof is not compromised.