Penetration flashing collar systems — pitched tiled roofs

Deks D-1 Multi Flashing is the Australian industry standard pre-formed penetration flashing collar for round pipe and conduit penetrations through pitched tiled roofs. Manufactured by Deks Industries in Australia, it consists of a square aluminium or polymer base plate that sits on the roof deck below the tile level, with a flexible EPDM collar that seals around the pipe OD. The base plate is integrated into the roof sarking and tile course — the tile is cut to fit around the flashing base, and the EPDM collar is stretched over the pipe to create a watertight seal. D-1 is the standard Deks product for PVC plumbing vent pipes and electrical conduit penetrations through terracotta and concrete tiled roofs on Class 2 strata apartment buildings. Available in a range of sizes to suit pipe ODs from 13mm to 150mm. Confirm the pipe OD, roof pitch range, and tile profile with Deks technical before ordering to ensure the correct size and base plate configuration is specified.

Deks 45 Aluminium Flashing is Deks Industries' penetration collar product incorporating an aluminium base plate rather than the polymer base plate used in the standard D-1 Multi Flashing. The aluminium base plate provides greater resistance to thermal movement on steep pitches and on concrete tile roofs where differential expansion between the tile and the flashing base is a concern. The EPDM collar is the same flexible sealing element as the D-1 range. The Deks 45 is the preferred product on concrete tile roofs, steeper pitched roofs, and on installations where the roof plumber requires a metal base plate for fixing or compatibility reasons. Confirm size, pitch compatibility, and current Deks 45 product range with Deks technical before ordering.

Deks Poly Multi-Pitch is Deks Industries' polypropylene multi-pitch penetration flashing collar designed for situations where the roof pitch varies or is not standard, or where a single flashing product must be stocked for use across a range of roof pitches. The base plate is designed to be adjustable or configured at installation to match the roof pitch angle — confirm the adjustment mechanism and range from the current Deks Poly Multi-Pitch installation instructions. The EPDM collar provides the watertight seal around the pipe OD. The 0–45° pitch range makes this product suitable for use on very low-pitch tile roofs through to steep tiles pitches. Confirm pipe OD size range and current product name with Deks technical before specifying.

Polyplas Poly-I-Flash is an Australian-manufactured pre-formed polypropylene and EPDM penetration flashing collar, positioned as an alternative to the Deks D-1 range for round pipe and conduit penetrations through pitched tiled roofs. The product incorporates a polypropylene base plate and an EPDM collar element. Used for PVC plumbing vent pipes, electrical conduit, and similar round penetrations through terracotta and concrete tiled roof systems. Confirm pipe OD size range, roof pitch suitability, and installation requirements with Polyplas technical before ordering. Where Deks products are unavailable or where local supply of the Polyplas range is more convenient, Poly-I-Flash provides a comparable pre-formed collar solution.

Kempart lead-lined collar products are used for pipe penetrations through tiled roofs where a lead-dressed appearance is required, where heritage building conservation requirements specify lead flashing, or where the lead collar provides a superior dressing to the tile surface profile that a rigid pre-formed EPDM collar cannot achieve. Lead collars are dress-formed by the roof plumber on site, working the lead around the tile profile and pipe to create a weathertight seal. Lead has the advantage of being malleable and self-forming to complex tile profiles where a factory pre-formed polypropylene or EPDM base cannot sit flush. Used on heritage-listed buildings, high-specification restoration projects, and where a heritage conservation plan requires lead flashings. Confirm lead specification (code weight), minimum thickness, and detailing requirements with the heritage consultant or project specification before ordering.