Flat Roof Drainage

Harmer & Wade Cast Iron, and Harmer Aluminium Roof Outlets

Cast Iron Roof Outlets offer strong, versatile drainage solutions for a wide range of buildings. Harmer AV® is a high-performance range of metal roof outlets, ideal for flat roofing applications...

Harmer Cast Iron Roof Outlets

Harmer Cast Iron Roof Outlets offer strong, versatile drainage solutions for a wide range of building applications. Ideal for load-bearing installations, including those exposed to vehicular traffic, cast iron ensures long-lasting performance.

Key Features:

• Variety of Options: Includes medium and large sump bodies, two-way outlets, and a selection of load-bearing grates.
• Roof Compatibility: Suited for flat roofs with concrete, timber, or lightweight metal decks, and ideal for copper or lead-clad roofs.
• Heavy Duty: Load rating up to 12.5 tonnes, with options for high-flow drainage.
• Waterproofing Integration: Compatible with single-ply, felt, and asphalt waterproofing systems.

Durability & Quality:

• Long-Lasting: Cast iron resists impact damage and is 100% recyclable.
• Corrosion Resistance: Sherardized zinc coating and tough polypropylene grates ensure durability.
• Grate Options: Available in cast iron, nickel bronze, or aluminium with optional powder coating.

Installation & Compliance:

• Standards: Cast to BS EN 1561 for reliable performance in flat roof drainage.
• Installation: Requires additional protective coating for outlet flanges during installation.

Harmer Cast Iron Roof Outlets combine strength, longevity, and versatility, offering a trusted solution for both standard and heavy-duty drainage needs.

 

Download the technical brochure:

 

Wade Cast Iron Roof Outlets

 

Wade Cast Iron Roof Drainage Solutions offer a wide range of products, ideal for load-bearing applications, including those exposed to vehicular traffic. With over 50 years of experience, Wade is a leading UK manufacturer of high-quality drainage products.

Key Features:

• Versatile Compatibility: Suitable for copper or lead roofing materials and designed for various roof constructions, including flat roofs.
• Heavy-Duty Performance: Built to withstand expected loads and provide reliable drainage.
• Tailored for Specific Roof Types: Designed to accommodate slab depth, insulation thickness, waterproofing membrane, and pipework size.
• Pipework Flexibility: Wade outlets can connect to all standard pipework, with some models requiring adaptors or couplings.

Durability & Maintenance:

• Long-Lasting: Made from cast iron, offering robust performance with minimal maintenance.
• Regular Inspections: Ensure outlets are free from debris, and repaint cast iron parts every five years to maintain performance.

Compliance & Installation:

• Standards Compliant: Designed in accordance with BS EN 12056-3.
• Easy Installation: Can be connected to pipework directly or with the use of adaptors.

Wade roof outlets combine reliability, durability, and ease of installation, making them an excellent choice for flat roof drainage systems.

 

Download the technical brochure:

 

Harmer Aluminium AV® Roof Outlets

Harmer AV® is a high-performance range of metal roof outlets, ideal for flat roofing applications with continuous waterproofing membranes. Available with spigot or screw connections for vertical discharge, these outlets are designed for use with flat roofs made of insitu cast concrete, timber, or lightweight metal decks.

Key Features:

• Roof Compatibility: Suitable for warm, cold, and inverted roofs, compatible with single-ply membranes, mastic asphalt, and built-up felt systems.
• Enhanced Drainage: Provides up to 40% more drainage capacity than traditional gravity outlets.
• Flexible Installation: Available in retro-fit and multi-gulley versions, perfect for both new builds and refurbishments.
• Pipework Compatibility: Works with Harmer SML cast iron systems and other types of pipework.

Durability:

• Long-Lasting: Made from precision-cast aluminium (LM6), with a lifespan of up to 40 years in rural areas. Aluminium is 100% recyclable.
• Corrosion-Resistant: Lightweight, durable, and non-corrodible.

Additional Features:

• Grates: Standard domical grates, with flat grates available. Grates are polyester powder-coated in blue, clamping collars in yellow.
• Limitations: Designed for connection to individual downpipes, not suitable for managed rainwater systems.

Harmer AV® Roof Outlets offer efficient, durable drainage for flat roofs, ensuring reliable performance across a range of waterproofing systems.

 

Download the technical brochure: