Based on the provided reference, Brick Defence (which addresses the concept likely referred to as "Defence brick") is a measure designed to stop water from entering a building through vulnerable points like air bricks and other vent openings.
Understanding Brick Defence
Brick Defence systems are essentially protective barriers or devices intended to safeguard properties from water damage, particularly during flooding or heavy rain.
According to the reference:
- Brick Defence are one of the automatic and manual measures to prevent water ingress through air bricks and vent openings.
This means they are solutions you can use that either operate automatically (e.g., sensing water and closing) or require manual activation (e.g., covers you fit over vents) to block water entry.
Why is Water Ingress Through Air Bricks a Problem?
Air bricks and vent openings are essential for ventilation, allowing air to circulate and prevent damp issues within a building's structure, especially under floors (in suspended timber floors). However, their open nature makes them a direct entry point for water during external flooding.
Water entering through these openings can:
- Flood subfloor voids.
- Damage structural timbers, leading to rot.
- Cause damp and mould issues inside the property.
- Damage insulation and services routed through the subfloor.
How Brick Defence Works (Types of Measures)
While the reference mentions both automatic and manual measures, it doesn't detail specific types. However, based on the concept of preventing water ingress through vents, typical solutions include:
- Manual Covers: These are physical barriers (like plates or grilles) fitted directly over the air brick or vent opening when flooding is anticipated. They require someone to install them manually.
- Automatic Vents: Some advanced systems might incorporate mechanisms that detect rising water levels and automatically close the vent opening to create a seal.
The purpose of any Brick Defence system is to create a watertight seal over the air brick or vent opening when needed, preventing floodwater from passing through.
Key Takeaways
- "Defence brick" likely refers to Brick Defence, a system or measure.
- Brick Defence aims to prevent water ingress.
- The vulnerable points protected are air bricks and vent openings.
- These measures can be automatic or manual.
Understanding and implementing such measures is crucial for flood resilience in properties with low-level ventilation points.
