PQ-20 W Paraquartz

Langley PQ-20 W Paraquartz Liquid Roofing System

The PQ-20 W (warm roof) system is part of the Langley Paracoat range of cold applied liquid waterproofing systems. Paraquartz is an advanced, single pack, high performance, moisture triggered polyurethane, quick curing, waterproofing system with skid-inhibiting surface for flat roofs, walkways and balcony areas that carries a 20 year* independently insured guarantee for both materials and workmanship.

When to Specify

This system is for situations where a skid-inhibiting finish is required on new build or refurbishment projects (where conditions allow, existing systems can be overlaid, avoiding costly strip-ups). Suitable for all roof decks (timber boarding requires a nailed attachment layer in accordance with BS 8747:2007).

(1a) Paraquartz Clear, 1000 microns, 0.75 kg/m² **

(1b) Paraquartz Granules, 0.7 to 12mm (sieve size), 5.00 kg/m² **

(2) Paraquartz Top Coat (Dark Grey), 0.75 kg/m² **

(3) Langley Embedment Fleece, 0.2225 kg/m² **

(4) Paracoat Base Coat (Red), 1.00 kg/m² **

Overall thickness of (2), (3), (4) = 1500 microns **

(5) Adepar JS, 3mm, 3.60 kg/m²

(6) Parafoam Ultra, 50-140mm (10mm increments), 4.48 kg/m² (140mm)

(7) Parevapo SBS, 3mm, 3.80 kg/m²

(8) Langley Primer

(9) Concrete Deck

Total System Weight (based on 140mm insulation thickness) = 19.605 kg/m² **

* 25 year guarantee available, see guarantee section
** Liquid coating product measurements are nominal

Durability

Extremely robust, seamless yet flexible roof covering. Reinforced with glass fibre fleece. Permanently elastomeric. UV resistant. Skid-inhibiting finish. Heavy-duty, polyester composite reinforced, SBS elastomeric bitumen metal lined vapour barrier.

Resistance

Tensile Strength: 11.5 N/mm²
Shear Strength: 98.7 N
Elongation: 500% (un-reinforced)
Fire Rating: EXT. F.AB BS 476: Part 3: 20004
Broof (t4) EN 13501-5: 2005

Lifespan

Long term solution, life expectancy in excess of 20 years.

Installation

Paraquartz is a single pack high performance polyurethane elastomeric compound. User friendly, quick and easy to install. No ‘on site’ mixing required. Rapid curing, typically 2 hrs/coat (depending on ambient temperature). Curing is moisture triggered. Full range of supporting products. These include specialist primers and biocidal wash.

Guarantee

System carries a 20 year independently insured guarantee for both materials and workmanship.
Guarantee can be extended to 25 years with the application of an additional top coat.
Contact Langley for details.
Can only be installed by approved contractors to ensure product quality is maintained
Full range of accessories/supporting products, all included under a single comprehensive guarantee, includes: rooflights, refurbishment outlets, vents, lead-free flashings, edge trims etc.

Holistic Package

For users peace of mind, this system is supported by the full Langley package that includes: survey’s, condition reports and proposals, specifications, site monitoring and reporting, technical and design advice, guarantee inspections, all at no additional cost.

The above information is issued in good faith and without warranty and is intended as a guide only. The information comprises typical data and does not constitute a specification.