Roofing screw with sealing washer fixed into a roof sheet

Self-Drilling Roofing Screws with EPDM Washers (Tek Screws) – Packs of 100

Price on request

Self-drilling hex-head roofing screws (Tek screws) with 16 mm bonded EPDM sealing washers — for fixing D staple plates and brackets through profiled steel roof sheets into steel purlins, without pre-drilling. Packs of 100.

Tell us the size and quantity you need and we'll come back to you with a price, including UK delivery.

Enquire for price or call +44 (0) 1689 253 149

SKU: TVS-TEK Category: Fixings & Fittings

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Let us know which sizes and how many you need, plus your delivery postcode, and we'll email you a price including UK delivery.

Description
Additional information

Description

Drill, tap and seal in one step

These self-drilling screws drill their own hole and form their own thread in one operation, and the bonded EPDM washer compresses under the head to keep the fixing watertight. Choose light section for thinner steel purlins and rails, and heavy section for thicker structural steel.

Type	Size	Suits steel approx.	Pack
Light section	5.5 × 25 mm	1.2–3.5 mm thick	100
Light section	5.5 × 32 mm	1.2–3.5 mm thick	100
Heavy section	5.5 × 32 mm	4–12 mm thick	100
Heavy section	5.5 × 38 mm	4–12 mm thick	100

5.5 mm diameter with 8 mm hex washer head — drive with a standard 8 mm hex socket
16 mm bonded EPDM sealing washer
Corrosion-resistant coated carbon steel; stainless (A2 bi-metal) and longer lengths for insulated or composite roofs available on request

Fitting tips

Fix through the crown (top) of the roof profile, at 90° to the sheet.
Use a screw gun with a depth setting — tighten until the washer is compressed and just visible around the head, without distorting it.
Not sure of your purlin thickness? Tell us and we’ll advise.

Fibre-cement roofs: these screws are for steel. Fibre-cement sheets need different fixings that are pre-drilled through the crown — please contact us, and see HSE Asbestos Essentials sheet a9 before drilling any asbestos cement sheet.

Working on roofs: fibre-cement sheets, rooflights and many older metal roofs are fragile. Never go onto a roof without a safe system of work and fall protection — see HSE HSG33. Asbestos cement sheets must not be drilled without the precautions in HSE Asbestos Essentials sheet a9.

Prices on request — use the form below to tell us the sizes and quantities you need, and we’ll come back to you with a price including UK delivery. We can also put together a complete fixings kit for your roof alongside your Silent Roof Material order.

Image: “Schraube mit Dichtung” by Leo Miregalitheo, CC BY-SA 4.0, via Wikimedia Commons. Photos are illustrative.