Screws

Tek screws for metal roofing

Tek screw is the trade name for a self-drilling screw. The drill point cuts its own hole, so you fix the sheet in one step without pre-drilling. On a metal roof, the screw you need depends on what is under the sheet: steel purlins or timber battens.

Into steel, the Multi-Fixx M6-11 x 65 mm SDS hex neo is a Class 4 coated screw with an EPDM washer that seals the fixing. The head is powder coated in Colorbond colours to match the sheet. Shorter Multi-Fixx screws in 25 and 50 mm are here too, along with 40 mm batten screws in Class 3.

The Bremick 6.2 x 65 mm roofing screw has a timber and steel drill point and fixes sheets and flashings to battens or to steel purlins up to 1.6 mm thick. It also comes in 25 and 50 mm.

Into timber, a Type 17 timber screw cuts its own path without pre-drilling. Ours come in 12 x 25 and 12 x 50 mm, hex head with a neo washer, in Class 4.

For small fixings into steel, the Metal Teks 10g x 22 mm wafer head drills into steel up to 2.5 mm and keeps a low head. For polycarbonate sheeting, use Polycut fixings in 50 and 65 mm or Bremick Polycut Multifix screws, not standard metal roof screws.

Seal laps and penetrations with roof and gutter sealant, and join flashings with pop rivets.

Roofing screw FAQs

What is a tek screw?

A self-drilling screw. Its drill point makes the hole as it goes in, so there is no separate drilling step.

Which screws do I use on a Colorbond roof?

A Class 4 SDS hex screw with a neo washer, such as Multi-Fixx, with a head colour matched to the roof. Use the length that suits your sheet profile and what you are fixing into.

What is the difference between Class 3 and Class 4?

They are corrosion coating classes. Class 4 is the heavier coating of the two, made for harsher exposure.

Do you ship roofing screws Australia-wide?

Many packs can be couriered Australia-wide at the rate checkout shows. Some are pickup or Victorian delivery only, and checkout shows which.