Tarmac offers a range of drainage base aggregates for permeable pavements and porous outdoor surfaces used in Sustainable Drainage Systems (SuDS). They combine stability and load bearing characteristics with high water permeability.
We can supply permeable sub base aggregates that conform to British Standard BS EN13242 and BS EN12620 and meet the requirements of BS7533 which covers the design and installation of paved surfacing including concrete and stone slabs or flagstones and blocks pavers.
Our drainage aggregates include Type 3 aggregate (MOT Type 3) and Type 1X a 40mm down permeable sub-base screened to create a reduced fines aggregate.
It also includes specialist aggregates for SuDS systems. ULTIFLOW specialist drainage aggregates can be used in sustainable drainage schemes. It can be used with a range of porous surfacing materials including porous asphalts, permeable concretes, block paving and loose aggregates.
Fast draining base aggregates for a range of applications
Base aggregates for SuDS systems
Sustainable drainage systems need a specialist base aggregate that will deliver structural performance to support the surface course but also form a reservoir layer that allows the surface to stay free of water but holds it back from immediately entering the water course.
Drainage aggregates for car parks
ULTIFLOW drainage aggregates provide a suitable free draining base for car parks where the surface is porous and fast draining. They also provide the structural performance required to resist vehicle loading.
Base aggregates for sports surfaces
Sports surfaces, multi use games areas (MUGA) and playgrounds need a specialist base aggregate to enable rapid drainage after heavy rain and deliver all weather performance.
