Triflex ProTerra Buried

A PMMA system for use on walkways, balconies and terraces beneath coverings or in buried and inverted build-ups
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BBA certified

Where an alternative to a self-finished waterproofing and surfacing system is required, for example paving slabs, tiles, timber decking or artificial grass it is essential that the highest quality waterproofing system is used beneath.

The BBA and ETA certified Triflex ProTerra Buried system is the perfect answer, offering reliable, long term waterproofing that can be used in conjunction with a wide range of both loose laid and fully bonded overlay solutions. The system is ultra-fast curing and cold liquid applied, allowing installation to be completed quickly, without the use of hot works, and with minimal impact on users. Triflex ProTerra Buried is available in both a standard and a heavy-duty variant, so whatever the covering, we can provide a solution that lasts.

System highlights

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Dynamic crack bridging, fully reinforced, cold applied system

Triflex lead from the front. Featuring an ETA certified waterproofing membrane with unique resins with enhanced elastomeric properties and high tensile strength reinforcement, Triflex ProTerra Buried delivers a totally waterproof solution that can accommodate movement and cracking within the structure. There is no risk from hot works during installation as all Triflex materials are applied in a totally cold liquid form, curing to create a waterproofing membrane solution that lasts.

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Fast curing with rapid installation

Rapid curing and easy to install, Triflex systems allow buildings to remain fully occupied during installation, limiting access restrictions and unnecessary disruptions to everyday life.

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Tough and durable protection

Triflex ProTerra Buried is designed for use beneath coverings and in inverted and buried build-ups, easily withstanding the permanent loads created from the overburden. The durable system is unaffected by ponding water, can be overlaid with cementitious materials, and is resistant to chlorides (salts), carbon dioxide ingress, and approved de-icing and cleaning products. Protection that's built to last, with a low lifecycle cost.

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Asphalt overlay

Many balconies, walkways and terraces have historically been waterproofed using asphalt which over time will fail. Triflex has more than 30 years’ experience of asphalt overlay in the UK and Triflex ProTerra Buried is the ideal solution for directly overlaying failing asphalt where a buried or inverted build-up is required. In fact, whatever the substrate, we can provide a quick, easy and reliable overlay solution.

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Safety and environmental

Our solvent and isocyanate free resin technology has been assessed under BREEAM principles and can contribute to A+ ratings.

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Versatile design

Triflex ProTerra Buried is available in a standard and high duty variant. Create your perfect design by choosing from a wide range of overlay options such as tiles, paving, decking, cushion surfaces, artificial grass, cementitious overlay and much more.

ProTerra Buried

Application areas

  • External walkways, balconies, terraces, pedestrian bridges and other pedestrian trafficked areas beneath coverings
  • In inverted insulated external walkways, balconies, terraces, pedestrian bridges and other pedestrian trafficked areas
  • High risk areas subject to significant levels of structural movement and cracking

Suitable for

  • Refurbishment
  • New build
  • Overlay of existing failed waterproofing systems

Compatible substrates

  • Asphalt and polymer modified asphalt
  • Concrete, concrete repair materials and screeds
  • Existing membranes
  • Steel
  • Structural plastics
  • Timber

Suitable constructions

  • Cast in situ concrete
  • Permanent formwork with in situ concrete
  • Precast concrete planks with or without structural topping
  • Precast double tee units with or without structural topping
  • Steel / galvanised steel / structural plastic / timber constructions
  • Insulated / warm deck build-ups

System variants

Triflex ProTerra Buried

Triflex ProTerra Buried is the perfect solution for those looking for a wider range of both loose laid and fully bonded overlay solutions while ensuring long term protection.
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Triflex ProTerra Buried Heavy Duty

Triflex ProTerra Buried Heavy Duty provides a tough, robust waterproofing solution for fixed or bonded coverings and to protect areas where further impact and abrasion resistance is required.
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Resin colour

Triflex ProTerra Buried is available in 7032 Pebble grey.

Triflex ProTerra Buried colour card

Overburden possibilities

Triflex ProTerra Buried is designed to be used with coverings including tiles, paving, decking, artificial grass and much more.

Require an on-site survey or quote?

All installations are carried out by our network of Triflex Authorised Contracting Partners. If you have a project we can provide a free no obligation on-site survey and can put you in touch with local Triflex contractors in your area that will be able to provide you with a quote.

To organise your free on-site survey you can either complete our project enquiry form or contact your local Business Development Manager, who will be more than happy to discuss your requirements.

Triflex Authorised Contracting Partners can place orders by calling 01785 819119 or emailing

Project enquiry


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Fully certified to the highest UK and European standards and classifications, including:

BBA certified

  • Durability: Under normal service conditions the system will have a service life of at least 15 years

EN 1504-2 certified

  • B3.2 (-20°C) dynamic crack bridging

ETAG 005 certified (reinforced waterproofing membrane)

  • 25 year expected working life

Fire performance

  • BS 476-3 (EXT.F.AA)
  • EN 13501-5 : Class BROOF (t1) / (t2) / (t3) / (t4)
  • EN 13501-1 : Class E

Root and rhizome resistant (reinforced waterproofing membrane):

  • FLL Certified: Root and rhizome resistant

NHBC accepted

Manufacturer certification

  • ISO 9001 Quality Management
  • ISO 14001 Environmental Management
  • ISO 50001 Energy Management

Take a look at Triflex in action

Looking for support?

Delivering solutions together, that's our motto. If you require any support, have an upcoming project or just a general enquiry then please don't hesitate to get in touch, we're always happy to help.