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External Cowls

External cowls provide essential weatherproof ventilation outlets for cavity walls and ducting systems. These robust units protect internal spaces from rain ingress whilst maintaining proper airflow – because nobody wants a damp surprise behind the plasterboard. Available in multiple sizes to suit standard cavity widths, our external cowls feature durable construction designed to withstand harsh weather conditions. Essential for kitchen extraction, bathroom ventilation, and passive air systems, they ensure Building Regulations compliance whilst delivering reliable performance. Professional-grade components that won’t let you down when the elements turn nasty.

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  • Timloc External Cowl - 255 x 160 (1 pcs)

    Timloc External Cowl – 255 x 160 (1 pcs)

    From £2.60£3.12 EX VATINC VAT Select options This product has multiple variants. The options may be chosen on the product page
  • Timloc External Cowl - 255 x 230 (1 pcs)

    Timloc External Cowl – 255 x 230 (1 pcs)

    From £2.84£3.41 EX VATINC VAT Select options This product has multiple variants. The options may be chosen on the product page
  • Timloc External Cowl - 255 x 95 (1 pcs)

    Timloc External Cowl – 255 x 95 (1 pcs)

    From £2.34£2.81 EX VATINC VAT Select options This product has multiple variants. The options may be chosen on the product page