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Langley LPA-25 Warm Roof PMMA Liquid Waterproofing Roof System
Verified by manufacturer 7 months 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).
- 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. Other Guidance for specification option: Available in any RAL colour. |
Material | Resin Polyester Guidance for specification option: Fleece. Other Guidance for specification option: Insulation: Polyisocyanurate (PIR) foam. |
Shape | Formless |
Warranty description | 25 year Guidance for specification option: Independently insured guarantee for materials, design, workmanship and consequential loss (only valid when installed by approved contractors). |
Uniclass | |
CAWS | J31/10 Warm deck roof coating J31/110 Cold deck roof coating J31/120 Warm deck roof coating J31/5 Cold deck roof coating |
Specification data - Liquid-applied cold roof covering systems
Classification data | |
Preparation | |
Horizontal work | Spray-On-Primer. Guidance for specification option: 0.2–0.5 kg/m². |
Skirtings and vertical work | Spray-On-Primer. Guidance for specification option: 0.2–0.5 kg/m². |
Carrier membrane | |
Type | Paratene Air and Vapour control Layer (AVCL). Guidance for specification option: 0.60 kg/ m². |
Liquid-applied waterproofing | |
Type | PMMA WP Base Coat. Guidance for specification option: 1.5 kg/m². PMMA WP Top Coat Guidance for specification option: 1.5 kg/m². |
Reinforcement | PMMA Fleece. Guidance for specification option: 0.11 kg/m². |
Surface protection | PMMA Sealer Coat. Guidance for specification option: 0.5–0 -0.6 kg/m². |
Weight | 9.17–9.57 kg/m². Manufacturer guidanceTotal system weight based on 130 mm insulation thickness. |
Colour | Dark Grey. Other. Guidance for specification option: Available in any RAL colour. |
Fire performance | Broof (t4). Guidance for specification option: To BS EN 13501-5:2016. |
Curing time | 30 minutes. Guidance for specification option: For each coat. |
Insulation | Parafoam Ultra Insulation. Guidance for specification option: 4.16 kg/m² (to achieve thickness of 130 mm). |
Sustainability data
Material | Resin Polyester Guidance for specification option: Fleece. Other Guidance for specification option: Insulation: Polyisocyanurate (PIR) foam. |
Expected Life | 25 year |
Literature
PR-25 Roofing System Data Sheet
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