Roofing & Tanking

Mastic asphalt roofing for customers in St. Austell and across Cornwall 

Premier Mastic Asphalt is your go-to company for mastic asphalt roofing and tanking systems in the Cornwall area. 

Roofing

Mastic asphalt can be applied to form a continuous waterproof covering over flat, sloped or curved surfaces and can be worked round pipes, roof lights and other projections.

It can be laid on most types of rigid sub-structure such as concrete, pre-cast concrete deck units, timber boarding, metal decking and other proprietary decking units. Thermal insulation materials can easily be laid as part of a mastic asphalt specification to give any required U-value. Treatments applied to asphalt can provide a surface suitable for traffic, increase solar reflectivity and provide a decorative finish.

Mastic asphalt is traditionally recognised as one of the best and most durable waterproofing membranes. The development of polymer-modified asphalt applied in accordance with the correct design detailing will ensure many years of maintenance-free life.
Flooring and paving
Tanking system

Tanking system

Mastic asphalt, when used on underground structures, provides a continuous waterproof lining or ‘tanking’ to walls, floors and foundations, constructed in direct contact with the earth. In addition, mastic asphalt is used for lining structures in water and sewage treatment works.

When fully confined, it will provide an effective barrier to the transmission of water from the ground for the design life of the structure in which it is incorporated.

Acid resisting mastic asphalt can also be used to line bund walls and emergency catchment areas where corrosive liquids are involved.

Types of mastic asphalt

Mastic Asphalt for Tanking and Damp-Proof Courses (limestone aggregate) BS 6925: 1988 Type T 1097.

Although Kitemarked and covered by BSI Certification ,the following grades are manufactured to within much narrower requirements than those set out in the British Standard certification.

Tankstar B
Product Code 4301
BS 6925: 1988
Type T 1097/1/B
The most economic tanking grade with an asphaltic cement composition of 100% bitumen.

Tankstar T 
Product code 4302
BS 6925: 1988
Type T
1097/1/T25
The addition of 25% Trinidad Lake asphalt to the asphaltic cement composition gives improved laying qualities and greater thermal stability.

Permanite Asphalt manufactures an acid resisting grade of mastic asphalt tanking for situations where contact with acidic substances would occur. Please contact Premier Mastic Asphalt for more information.
For tanking systems in Cornwall, call Premier Mastic Asphalt of St. Austell today on
01726 822 918
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