fire resisting roof void ventilators. The AIRTRAK ® -FR ventilators incorporate an intumescent seal that activates in the instance of fire or at temperatures of 180-200°C. These ventilators will effectively close off ventilation apertures up to 25mm and help to control the spread of fire. AIRTRAK ® -FR brochure.. 8 products. Cavity Trays RAV-FL Flat Roof Abutment Ventilator - 1.2 Metres (PVCU Grey) (1) £22.62 ex VAT £27.14 inc VAT Was: £0.00 ex VAT. Tapco Roof Abutment Ventilator Strip - 1000mm x 20mm x 10mm (Black) £19.27 ex VAT £23.12 inc VAT Was: £0.00 ex VAT. Manthorpe G1105 Abutment Flash Vent - 3m. £47.76 ex VAT £57.31 inc VAT Was: £49.78.

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Products in Abutment Ventilation: Showing 1 - 7 of 7 products. Type RAV-FL Flat Roof Abutment Ventilator 1.2m. £29.70 incl VAT. Add to basket. Glidevale High Level Abutment Vent for Non-Profiled Tiles & Slates - 1m. £23.40 incl VAT. Add to basket. Manthorpe Abutment Flash Vent (3m Roll-out). Flat roof abutment ventilator. Fixed to a timber upstand at the abutment to introduce air into the roof void. Front fins prevent roof felt from blocking the ventilation slots. Unseen when the roof is completed. 4mm ventilation slots promote unrestricted air flow and prevent the entry of birds and large insects.