Flat roof accessories since 1962

In our online-shop, you will find the complete b/s/t product range.
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b/s/t product variety. Find below a selection of our top categories:



Visit us in Hall 8, booth 316!



Stuttgart, 05.03. - 08.03.2024

New in our range!

b/s/t Parapet Vapour Barrier Connection


  • precisely fitting connection for round pipes to the parapet
  • can be installed quickly and without tools

Trade customer?

Welcome to our online-shop. Here you can find all of our Flat Roof Products including the corresponding technical data.

Online calculation tool for determining the drainage capacity for emergency overflows and water spouts

Using our online calculation tool, you can quickly and easily determine the drainage capacity of round and rectangular b/s/t water spouts and emergency overflows.

Current Product Range

In our PDF catalogue, you will find all flat roof products clearly sorted by product groups.

Favourite Products

b/s/t ALIT Deck Drain Bitumen DN 100 (OD 110)
SKU A128-B100
b/s/t Universal Leaf Guard
SKU 210-000
b/s/t PVC Parapet Drain DN 50 (OD 50)
SKU 132-050
b/s/t PVC Vent WD DN 100 (OD 110)
SKU 111-WD100

b/s/t field fasteners - now also explained in a video!

Watch our animated product video to find out how to install the field fasteners on a flat roof and get the answers to the following questions: What steps and tools are required? What are the main product features? What distinguishes the b/s/t field fastening system from other conventional manufacturer systems?

Our experience, practice and know-how, combined with our passion and vision, enable b/s/t to develop forward-looking products that have shaped the flat roof accessories market for over 30 years. Your projects are what drives us!