Caltech Alpha

Approved for use on

Balconies, Terraces & Walkways Flat Roofs Zero Falls Buried Roofs 

For use as a roof waterproofing system on:

• new and existing flat roofs
• zero fall in protected roofs, with limited access on the following substrates
• terraces and balconies

Substrate

Concrete Mastic Asphalt Plastic Reinforced Bituminous Membranes Steel 

For use on new and existing flat roofs, including zero fall in protected roofs, with limited access on the following substrates:

• Concrete (primed with Caltech Epoxy damp Tolerant Concrete Primer)
• Mastic asphalt (unprimed)
• Bituminous roofing membranes (unprimed)
• Steel (primed with Caltech METprime)
• Timber (primed with Euroroof SA Primer)
• PVC (primed with Caltech PU Primer/Sealer)
• Existing polyurethane coatings (primed with Caltech PU Primer/Sealer)

Durability

25 Years 

Under normal service conditions, the system will have a service life of at least 25 years, provided it is designed, installed and maintained in accordance with the Certificate holder’s instructions.

Installation Requirements

The system should only be installed by installers who have been trained and approved by the Certificate holder.

Puncture Resistance

P1 - non accessible

Most Compressible Substrate (eg insulation)

P4 - roof gardens, inverted roofs and green roofs)

Most Compressible Substrate (eg insulation)

Fire Safety

When tested in accordance with CEN/TS 1187 : 2012 (test 4) was classified in accordance with EN 13501-5 : 2016 the construction given achieved a Broof(t4) classification for slopes below 10 degrees.