{"product_id":"telescopic-underfloor-vertical-vent-extension-piece","title":"Telescopic Underfloor Vertical Vent Extension Piece","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eTelescopic Underfloor Vertical Vent Extension Piece designed to extend the vertical reach of a primary telescopic underfloor ventilator system. \u003cbr\u003e\u003cbr\u003eThis 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. \u003cbr\u003e\u003cbr\u003eBy 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.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncreased Vertical Adjustment\u003c\/strong\u003e: Extends the reach of the main underfloor vent to accommodate deeper foundations and varying ground levels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure System Integration\u003c\/strong\u003e: Precision-engineered to connect seamlessly with compatible telescopic underfloor vent units, maintaining full airflow continuity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable and UV-Stabilised Construction\u003c\/strong\u003e: Manufactured from high-impact polypropylene resistant to decay, moisture, and soil chemicals for long service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreserved Airflow Efficiency\u003c\/strong\u003e: Maintains a clear, continuous ventilation path from the external air brick to the sub-floor void without obstruction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimplified Installation Process\u003c\/strong\u003e: Enables straightforward adjustment on-site, reducing the need for bespoke ducting or complex assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCost-Effective Adaptability\u003c\/strong\u003e: Provides an economical method to extend standard ventilation systems to suit non-standard depths.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRegulatory Support\u003c\/strong\u003e: Assists compliance with UK Building Regulations, including Approved Document C (moisture control) and Approved Document F (ventilation).\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub-Floor Ventilation Extension\u003c\/strong\u003e: Extends the vertical depth of telescopic or periscope vent systems to reach lower sub-floor voids.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeep Foundation Adaptation\u003c\/strong\u003e: Suitable where air brick positions are above standard height due to stepped or sloping ground.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Build Installations\u003c\/strong\u003e: Used during construction to achieve compliant underfloor ventilation in varying foundation designs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefurbishment Projects\u003c\/strong\u003e: Allows adaptation of existing ventilation systems to meet modern standards or altered floor levels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture Management\u003c\/strong\u003e: Ensures adequate airflow to prevent damp, condensation, and timber decay in underfloor spaces.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eInstallation Guidance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection to Vent Unit\u003c\/strong\u003e: Attach securely to the primary telescopic underfloor vent body, ensuring a tight fit to maintain airflow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight Adjustment\u003c\/strong\u003e: Stack one or more extension pieces as required to achieve the desired vertical depth between air brick and void.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlignment\u003c\/strong\u003e: Ensure alignment is maintained to prevent air restriction and preserve clear ducting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecuring in Place\u003c\/strong\u003e: Fix or stabilise components as recommended by the vent manufacturer to resist movement during backfilling or finishing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Verification\u003c\/strong\u003e: Check that the assembled vent path remains unobstructed and correctly positioned before completing external works.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eCompliance \u0026amp; Performance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Specification\u003c\/strong\u003e: Manufactured from UV-stabilised, weather- and impact-resistant polypropylene.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance Role\u003c\/strong\u003e: Extends vertical airflow path without reducing effective ventilation capacity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility\u003c\/strong\u003e: Designed for direct connection to standard telescopic or periscope underfloor vent systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability\u003c\/strong\u003e: Resistant to decay, moisture, and temperature fluctuations typical of below-ground environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRegulatory Alignment\u003c\/strong\u003e: Supports compliance with Building Regulations Approved Documents C and F for underfloor moisture and ventilation control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImportant Note\u003c\/strong\u003e: Extension pieces must always be used in conjunction with a compatible primary telescopic vent unit; do not install as a standalone component.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Unbranded","offers":[{"title":"Default Title","offer_id":53771415715951,"sku":"5001436","price":4.74,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/9784\/4591\/files\/Telescopic_Underfloor_Vertical_Vent_Extension_Piece_-_Photo.jpg?v=1783758359","url":"https:\/\/supplyyard.co.uk\/products\/telescopic-underfloor-vertical-vent-extension-piece","provider":"Supply Yard","version":"1.0","type":"link"}