Introduction
CGL is a leading UK company specializing in the design and manufacture of industrial and commercial secret gutter systems. These systems were developed in response to the 1980 oil crisis, focusing on thermal efficiency. Over the years, CGL has continuously improved its products to meet evolving building regulations concerning heat loss and CO2 emissions.

Key Features

• Proven leak-free performance over 25 years.
• In-house structural, thermal, and hydraulic design services.
• Available in standard and thermally-broken options.
• System warranty provided.
• Lined with Sarnafil G410 12EL membrane, 1.2mm thick.
• Alternative U-values available.
• Approved insulant used as standard.
• Durable enough to be used as walkways.
• Expected lifespan exceeds 35 years.

General Description
The CGL Membrane-Lined Gutter Systems are internal gutters that form part of the roof envelope, requiring insulation equivalent to the roof. They can be valley or eaves gutters, often hidden behind parapet walls or feature fascias.

Design and Components

• Galvanized steel substrate to BS EN 10142 standards.
• Standard insulant is 87mm thick polyisocyanurate, providing a 0.25 U-value.
• Membrane is 1.2mm thick Sarnafil G410 12EL, available in light or dark grey.
• Gutter joints are welded, eliminating the need for sealants.
• Self-supporting design, with optional support straps if needed.
• Factory-fitted stop ends, corners, T-pieces, and outlets.

Warranty Options

• 10-year company warranty covering product replacement.
• Insured commitment for design, material, fabrication, or installation failings.

Contact Information
CGL Systems, 2 Young Place, Kelvin Industrial Estate, East Kilbride, Glasgow G75 0TD. Tel: 01355 235561, Fax: 01355 247189, Email: [email protected], Web: www.cglsystems.co.uk