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Telescopic Underfloor Vertical Vent Extension Piece

URN: 5001436
Core
Bulk Discount
30+ units 60+ units 80+ units
£3.87ex. VAT £3.79ex. VAT £3.71ex. VAT
This product is designed to extend a telescopic underfloor ventilator horizontally or vertically, enabling it to be adjusted to suit various wall, cavity, and brick course configurations.

Nationwide Delivery

Fri 25 Jul

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Product Overview

This product is designed to extend a telescopic underfloor ventilator horizontally or vertically, enabling it to be adjusted to suit various wall, cavity, and brick course configurations.

URN: 5001436
£3.95ex. VAT

Delivery & Returns Information

How Our Delivery Works

We work with a nationwide network of trusted suppliers. As a result, items in your basket may be supplied by different suppliers and delivered separately. Where this applies, you'll see multiple delivery charges at checkout. We always aim to group products from the same supplier to keep delivery costs as low as possible.

Delivery Areas & Charges

Delivery charges listed on our website apply to mainland UK, excluding the following postcode areas: AB, CF, DD, DG, KW, IV, LA, LD, LL, NP, PH, SA, SY
If your delivery address falls within one of these postcode areas, we’ll be in touch before processing your order to confirm any additional delivery costs.
Please note: We do not currently offer delivery outside the UK mainland.

Standard (Nationwide) Delivery

Core Products
Core
ORDER VALUE DELIVERY CHARGE
Under £300 ex. VAT £20 ex. VAT
Over £300 ex. VAT FREE

Core Delivery charges apply only when all products in an order that have equivalents are accepted as such. If even one product cannot be substituted with an equivalent, the entire order will not qualify for Core Delivery charges.

Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products
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Under £100 £20 ex. VAT
Between £100 - £200 ex. VAT £10 ex. VAT
Over £200 ex. VAT FREE
Insulation, Plasterboard and Drylining Products
ORDER VALUE DELIVERY CHARGE
Under £150 £40 ex. VAT
Between £150 - £350 ex. VAT £35 ex. VAT
Over £350 ex. VAT FREE
Screws & Fixings and Adhesives & Sealants
ORDER VALUE DELIVERY CHARGE
Under £100 £7.50 ex. VAT
Over £100 ex. VAT FREE

Express Delivery

Express Delivery - Insulation and Plasterboard & Drylining
ORDER VALUE DELIVERY CHARGE
Under £400 £50 ex. VAT
Over £400 ex. VAT £35 ex. VAT
Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products
ORDER VALUE DELIVERY CHARGE
Under £300 £50 ex. VAT
Over £300 ex. VAT £35 ex. VAT

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Returns

We offer a 30 day returns policy on any faulty products.

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Key Features

  • {{open_in_full}} Extends vent to deeper voids
  • {{air}} Ensures effective sub-floor airflow
  • {{fitness_center}} Robust build for lasting performance
  • {{check_circle}} Simplifies deep void vent installs

Technical Specification

Technical Specification
Sales Unit:Each
Colour:Black

What is Telescopic Underfloor Vertical Vent Extension Piece?

A Telescopic Underfloor Vertical Vent Extension Piece is a purpose-designed component that attaches to a main telescopic underfloor ventilator (often called a TUV or periscope vent). 

Its primary function is to increase the overall vertical reach of the ventilation pathway. This is particularly important when the depth from the external air brick level down to the sub-floor void is greater than what the standard primary vent unit can accommodate.

Manufactured from durable, weather-resistant, and UV-stabilised polypropylene, this extension piece is built to withstand the demanding below-ground environment while maintaining its structural integrity and airflow pathway. 

It ensures that fresh air can be effectively ducted from an external air brick, down through challenging ground levels or deep masonry, and into the sub-floor void, and that moist air can escape.

 

Applications

  • Extending the height of underfloor ventilation systems
  • Improving airflow in taller subfloor voids
  • Enhancing the flexibility of ventilation in both new construction and renovation projects

 

Benefits

  • Increased Installation Height: Allows the primary underfloor vent to be extended vertically, accommodating deeper foundations, stepped ground levels, or higher finished floor levels relative to the air brick position.
  • Seamless System Integration: Engineered for a secure and precise fit with compatible primary telescopic underfloor vent units, maintaining the integrity of the ventilation system.
  • Durable & Weather-Resistant Construction: Made from high-quality, robust materials designed to resist moisture, soil chemicals, and temperature variations for long-lasting performance.
  • Maintains Airflow Pathway: Ensures a clear, unobstructed channel for air to travel between the external air brick and the sub-floor void, crucial for effective ventilation.
  • Simplifies Complex Installations: Provides a straightforward solution for achieving correct ventilation heights in challenging site conditions, often eliminating the need for complex or custom-made ducting.
  • Cost-Effective Adaptability: Offers an economical way to adapt standard ventilation systems to non-standard site depths, saving time and labour.
  • Supports Regulatory Compliance: Helps ensure that sub-floor ventilation meets the requirements of UK Building Regulations (such as Approved Document C for moisture control and Approved Document F for ventilation) by enabling correct vent positioning.


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