Product Overview
Telescopic Underfloor Vertical Vent Extension Piece designed to extend the vertical reach of a primary telescopic underfloor ventilator system.
This modular component connects directly to the main vent body, increasing the effective depth between the external air brick and the sub-floor void. Manufactured from UV-stabilised, weather-resistant polypropylene, it delivers long-term durability in damp or below-ground conditions.
By maintaining a continuous and unobstructed air pathway, it ensures that fresh air is drawn in and moisture-laden air is expelled efficiently, even where deeper foundations or irregular ground levels exist.
Features & Benefits
- Increased Vertical Adjustment: Extends the reach of the main underfloor vent to accommodate deeper foundations and varying ground levels.
- Secure System Integration: Precision-engineered to connect seamlessly with compatible telescopic underfloor vent units, maintaining full airflow continuity.
- Durable and UV-Stabilised Construction: Manufactured from high-impact polypropylene resistant to decay, moisture, and soil chemicals for long service life.
- Preserved Airflow Efficiency: Maintains a clear, continuous ventilation path from the external air brick to the sub-floor void without obstruction.
- Simplified Installation Process: Enables straightforward adjustment on-site, reducing the need for bespoke ducting or complex assemblies.
- Cost-Effective Adaptability: Provides an economical method to extend standard ventilation systems to suit non-standard depths.
- Regulatory Support: Assists compliance with UK Building Regulations, including Approved Document C (moisture control) and Approved Document F (ventilation).
Applications
- Sub-Floor Ventilation Extension: Extends the vertical depth of telescopic or periscope vent systems to reach lower sub-floor voids.
- Deep Foundation Adaptation: Suitable where air brick positions are above standard height due to stepped or sloping ground.
- New Build Installations: Used during construction to achieve compliant underfloor ventilation in varying foundation designs.
- Refurbishment Projects: Allows adaptation of existing ventilation systems to meet modern standards or altered floor levels.
- Moisture Management: Ensures adequate airflow to prevent damp, condensation, and timber decay in underfloor spaces.
Installation Guidance
- Connection to Vent Unit: Attach securely to the primary telescopic underfloor vent body, ensuring a tight fit to maintain airflow.
- Height Adjustment: Stack one or more extension pieces as required to achieve the desired vertical depth between air brick and void.
- Alignment: Ensure alignment is maintained to prevent air restriction and preserve clear ducting.
- Securing in Place: Fix or stabilise components as recommended by the vent manufacturer to resist movement during backfilling or finishing.
- System Verification: Check that the assembled vent path remains unobstructed and correctly positioned before completing external works.
Compliance & Performance
- Material Specification: Manufactured from UV-stabilised, weather- and impact-resistant polypropylene.
- Performance Role: Extends vertical airflow path without reducing effective ventilation capacity.
- Compatibility: Designed for direct connection to standard telescopic or periscope underfloor vent systems.
- Durability: Resistant to decay, moisture, and temperature fluctuations typical of below-ground environments.
- Regulatory Alignment: Supports compliance with Building Regulations Approved Documents C and F for underfloor moisture and ventilation control.
- Important Note: Extension pieces must always be used in conjunction with a compatible primary telescopic vent unit; do not install as a standalone component.