NBS Source
List your products

Topseal GreenTop System

Third party certifications:
  • BBA Agrément Certificate

    Certificate type

Topseal Systems Ltd

Fully waterproof roofing protection, with a sedum/ wildflower living top layer.

Jump to:
+44 (0)1423 886495 www.topseal.co.uk

Topseal GreenTop is environmentally friendly to install and provides the ultimate green roof system, guaranteed to perform as an active green roof, for a minimum of 25 years. It can be used to create a totally bespoke green roof or specified with Topseal’s recommended sedum green roof, or even an optional wildflower roof.

A Topseal GreenTop green roof can help increase local biodiversity, whilst adding positively to global environmental conditions. Apart from creating a naturally beautiful area, Topseal GreenTop adds extra thermal and sound insulation to a property, whilst delivering energy savings as it protects from internal temperature fluctuations in the summer and winter months.

The Topseal Greentop green roof will provide the ideal low-maintenance roof garden, with a high thermal resistance (typical U-value: 0.22).


- As Topseal DoubleTop System:

  • 18 mm OSB3 decking.
  • Topseal GRP roof, comprising: 2 x Topseal GRP laminate (450 g/m² reinforcement) and Topseal topcoat with choice of colours and finishes.

- Additional:

  • Drainage/ water retention layer.
  • GreenTop substrate.
  • GreenTop sedum/ wildflower.

General information
Specification data - Extensive green roof systems
Product Reference

Topseal GreenTop System


Standard: Dark Admiralty Grey. There is a further choice of 20 standard and 98 BS 4800 colours, insert requirements.


As drawing

Contractors choice

Product Options


A wide range of GRP edge trims and pebble borders can be installed; consult manufacturer with requirements.

Third party certifications