McAlpine 3 IN ROOF FLASHING 18 X 18

McAlpine 3 in Roof Flashing 18″ × 18″ (MacFlash RS4)

Product Description

The MacFlash Roof Flashing RS4 is a high-quality aluminium flashing designed to create a watertight seal around 3‑inch (110 mm) pipe penetrations through roofs. Measuring 18″ × 18″, it’s suitable for both flat and pitched roofs and serves as an efficient, lead-free alternative for sealing flue pipes, soil stacks, or ventilation outlets.

Key Features

• Size: 18 in × 18 in base for wide-reaching coverage

• Pipe Compatibility: Suitable for 3‑inch (110 mm) pipe diameter

• Material: High-grade aluminium with a synthetic rubber collar for flexibility and waterproofing

• Roof Pitch Compatibility: Works on flat roofs and pitched roofs up to 45°

• Design: Flexible, corrugated base adapts to most roof profiles and eliminates the need for traditional lead slates

Advantages

• Easy Installation: Lightweight material and flexible base simplify fitting compared to lead alternatives

• Durable & Weatherproof: Aluminium resists corrosion, while the rubber collar maintains a long-lasting seal

• Cost-Efficient: Saves on both material and labour costs vs. lead flashing

• Versatile: Flexible design suits a wide range of roof coverings—tiles, slates, and shingles

Recommended Applications

• Residential & Commercial Roofs: Great for boiler flues, soil stack penetrations, and vent pipe terminations

• New Builds & Renovations: Ideal for lead-free projects and structures requiring dependable roof sealing

• Pipe Sizes: Specifically engineered for 3‑inch pipes in domestic and light commercial settings

Summary

The McAlpine MacFlash RS4 Roof Flashing is a modern, user-friendly solution for creating reliable pipe seals through roofing systems. Lightweight yet robust, with a flexible base and high-quality materials, it provides a superior, lead-free option that combines ease of installation with long-term performance.