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Langley HM-40 Paratech Hot Melt Waterproofing System
Verified by manufacturer 7 months ago
BBA Agrément Certificate
Certificate type
HM-40 is a monolithic, hot-melt bitumen waterproofing system for protected, inverted roofs, terraces, podium decks, and green roofs. Offering a 30-year independent insurance backed guarantee.
Application
Suitable for use in new build projects, where a protected membrane or green roof system is required, including:
- Flat roofs (including 'zero falls');
- Protected roofs;
- Green roofs;
- Terraces;
- Podium decks.
Primarily used for concrete substrates, but can also be used on plywood and for a warm (inverted) or cold roof configuration. Protection can be either in the form of polystyrene insulation (warm roof), round washed pebbles, paving/ podium or a green roof system.
Applied via fully-bonded, hot-melt application.
Description
A monolithic, elastomeric hot-melt bitumen waterproofing system designed for use on protected, inverted roofs, green roofs, terraces, and podium decks. The HM-40 system is fully bonded and provides a continuous waterproofing layer.
Features and Benefits:
- Single-application, hot-melt installation for efficient coverage of large areas.
- 30-year independent insurance backed guarantee or a 40-year product only warranty
- Reinforced with coated glass mesh
- Root-resistant when specified with Graviflex (HM) cap sheet for green roof applications.
- Elastomeric properties designed to accommodate structural movement.
- Fire performance: Suitable for use under National Building Regulations when covered with ballast, paving, or specified green roof systems.
- BBA certified (15/5276) and compliant with NHBC Technical Standards Chapter 7.1.
- Inverted systems are available.
Supported by the full Langley package that includes: surveys, condition reports and proposals, specifications, site monitoring and reporting, technical and design advice, guarantee inspections, all at no additional cost.
General information
Color | Grey Guidance for specification option: Dark grey. |
Finish | Textured |
Material | Bitumen |
Shape | Rectangle Guidance for specification option: Can be cut to any shape. |
Length | Bespoke |
Width | Bespoke |
Height | Bespoke |
Warranty description | 40 year Guidance for specification option: Materials and workmanship. |
Uniclass | |
CAWS | J41/110 Built-up reinforced bitumen membrane warm deck roof covering J41/12 Reinforced bitumen membrane cold deck roof covering J41/120 Built-up reinforced bitumen membrane inverted roof covering J41/130 Built-up reinforced bitumen membrane cold deck roof covering |
SKU Code | HM-40 |
Product range |
Specification data - Hot-applied polymer-modified bitumen waterproof coatings
Classification data | |
Third party certification | BBA Certificate. |
Colour | Dark grey. |
Horizontal work | Langley Primer (HM). |
Preparation Skirtings And Vertical Work | Langley Primer (HM). |
First layer | Paratech R Reinforcement (0.11 kg/m²). |
Intermediate layer | Paratech HM (3–5 kg/m²). |
Top layer | Paradiene 35 SR4 HM or Graviflex (HM), (4.4–4.6 kg/m²). |
Surface protection | Graviflex (HM). Paradiene 35 SR4 (HM). |
Weight | 7.51–7.71 kg/m². |
Elongation | 45% (maximum). Guidance for specification option: To BS EN 12311-1. |
Impact resistance | 1000 mm. Guidance for specification option: To EN 12691-A. |
Puncture resistance | 20 kg. Guidance for specification option: Static puncture resistance (to EN 12730-B). |
TensileStrength | 550 N/50 mm. Guidance for specification option: (to BS EN 12311-1). |
Overall thickness | 7–8 mm (approximately). |
Sustainability data
Material | Bitumen |
BIM objects
This BIM object has been authored to meet the requirements of the
Find out more about the
| Platform | Compatible | Version |
|---|---|---|
 Revit | Revit 2017 | 1 |
 IFC | - | 1 |
Product certifications
BBA Agrément Certificate
Paratech BBA
Case studies
Blackhorse Lane