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Langley LPA-25 Warm Roof PMMA Liquid Waterproofing Roof System - PMMA Liquid Waterproofing System
Verified by manufacturer 2 days ago
A cold applied PMMA liquid waterproofing system for balconies, walkways, and stairways. Offering a 25-year independent insurance backed guarantee. Suitable for new build or refurbishment projects.
Application
Suitable for areas where flame-free application is required. Compatible with most common waterproofing systems, including asphalt and bituminous membranes.
Description
A cold-applied, two-component PMMA (polymethyl methacrylate) liquid waterproofing system designed for flame-free installation in areas requiring a slip-resistant surface. The LPA-25 W system provides a continuous waterproofing layer with a durable finish.
Cold-applied, wet-on-wet application with rapid curing (typically 30 minutes per coat).
Features and benefits:
- 25-year independent insurance backed guarantee.
- Continuous waterproofing layer reinforced with polyester fleece for strength and crack-bridging.
- Slip-resistant finish designed for pedestrian areas.
- Fire performance: Tested build-ups that are compliant with Broof(t4) BS EN 13501-5:2016 are available.
- BBA certified (16/5339) and compliant with NHBC Technical Standards Chapter 7.1.
- Available in a range of RAL colours (minimum quantities apply).
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. Other Guidance for specification option: Available in any RAL colour. |
Finish | Textured |
Material | Polymethyl methacrylate (PMMA) Quartz Aggregate Polyester Fleece |
Shape | Formless |
Warranty description | 25 year Guidance for specification option: Independent insurance backed guarantee |
Uniclass | |
CAWS | J31/10 Warm deck roof coating J31/120 Warm deck roof coating |
Specification data - Liquid-applied warm roof covering systems
Classification data | |
Preparation | |
Horizontal work | PMMA primer (0.2–0.5 kg/m²). Guidance for specification option: 0.2–0.5 kg/m². |
Skirtings and vertical work | PMMA primer (0.2–0.5 kg/m²). Guidance for specification option: 0.2–0.5 kg/m². |
Insulation | |
Type | Parafoam Ultra Insulation. Guidance for specification option: 4.16 kg/m² (to achieve thickness of 130 mm). |
Carrier membrane | |
Type | Paratene AVCL (0.6 kg/m²). Guidance for specification option: 0.60 kg/ m². |
Fixing | Self-adhesive. |
Liquid-applied waterproofing | |
Type | Langley PMMA WP base and top coat (2 kg/m² + 1 kg/m² = 3 kg/m²). |
Reinforcement | Langley PMMA fleece (0.11 kg/m²). Guidance for specification option: 0.11 kg/m². |
Surface treatment | Langley PMMA self-levelling mortar (4 kg/m²). Langley PMMA quartz (up to 3 kg/m²). Langley PMMA sealer coat (0.5–0.6 kg/m²). Guidance for specification option: 0.5–0 -0.6 kg/m². |
System accessories | ParaTrim edge trims. Paraflash B3 flashings. Parafurb outlets. Pararange rooflights. |
Weight | 18.27–18.67 kg/m². Guidance for specification option: Based on full build-up including finishes and insulation (130 mm PIR). |
Colour | Dark Grey. Other. Guidance for specification option: Available in any RAL colour. |
Fire performance | Guidance for specification option: Broof(t4) build ups are available consult manufacturer for more details and insert requirements. |
Curing time | Guidance for specification option: Typically 30 minutes but will be dependent on environment temperature. |
Sustainability data
Material | Polymethyl methacrylate (PMMA) Quartz Aggregate Polyester Fleece |
Expected Life | 25 year |
Literature
PR-25 Roofing System Data Sheet