304 (A2) · C1022 Hardened
Roofing & Cladding Screws
Roofing and cladding screws with a sealing washer for fixing metal roof and wall sheeting to steel or timber.
About the Roofing & Cladding Screws
Roofing screws hold metal roof and wall sheeting down to steel or timber, with a sealing washer under the head to keep the water out. They come as cyclone multiseal screws with a 25mm sealing washer for steel, Type 17 cyclone multiseal screws for timber battens, and bi-metal 304 screws with aluminium seals, in Class 4 or X9 coatings with heads painted in COLORBOND steel colours. Choose the type, colour and size above; the guide below covers choosing a screw, coatings and the warranty.
Also called cladding screws or roof screws.
Features
- Bonded EPDM sealing washer
- Cyclone (multiseal) rated options
- Type 17 (timber) and metal drill points
- Class 4 and stainless
Applications
- Metal roof sheeting to steel purlins or timber battens
- Wall cladding on sheds and houses
- Cyclonic and high wind areas (cyclone multiseal)
Choosing roofing screws
- Cyclone multiseal (metal point): a universal 25mm aluminium sealing washer with a bonded EPDM seal. It suits all roof profiles, fixes roof sheet to steel frames, and is made for high wind areas and re-roofing. The assembly was static and cyclic tested at the James Cook University Cyclone Testing Station.
- Cyclone multiseal, Type 17 (timber): the same universal cyclone sealing washer on a Type 17 point, for fixing roof sheet to timber battens.
- Bi-metal 304 with aluminium seal: a stainless screw with a hardened drill point, for aluminium and stainless sheet. In very severe marine (C5) sites only 316 bi-metal is covered by the warranty.
- Fixing into timber battens? Choose the Type 17 cyclone multiseal here, or see the Type 17 screws page.
Screws to match COLORBOND steel colours
Roofing screw heads come painted to match the COLORBOND steel range, including Surfmist, Monument, Woodland Grey, Shale Grey, Night Sky, Basalt, Dune, Paperbark, Classic Cream, Evening Haze, Pale Eucalypt, Deep Ocean, Cottage Green, Manor Red, Windspray, Ironstone, Jasper and Wallaby, plus unpainted. Pick the colour in the selector above. COLORBOND is a registered trademark of BlueScope Steel Limited.
Class 4, X9 or stainless: coating and warranty
Choose the coating for the site. Hobson's self-drilling screw warranty sets out the warranty period in years for each corrosivity category (ISO 9223):
- Hobson calls its category names indicative only, and where a site sits between two categories the higher one applies. Get professional advice on your site's category (ISO 9223 and AS 4312), or ask us.
- In very severe marine (C5) sites only 316 bi-metal is covered; X9 and 304 bi-metal are not recommended there. Extreme (CX) sites need Hobson's written confirmation.
- The warranty covers the structural integrity of the exposed head and washer, not the shank or the appearance.
Corrosion warranty periods in years. NR = not recommended.
| Environment | Class 3 | Class 4 | X9 | 304 bi-metal | 316 bi-metal |
|---|---|---|---|---|---|
| C2: urban, inland | 20 | 25 | 30 | 35 | 40 |
| C3: moderate marine, industrial | 10 | 20 | 25 | 25 | 30 |
| C4: severe marine, industrial | NR | 15 | 20 | 20 | 25 |
| C5: very severe marine, industrial | NR | NR | NR | NR | 15 |
Fixing roofing screws
- Use a hex nut setter in a screw gun with a depth or clutch setting.
- Drive the screw square to the sheet, so the washer seats evenly.
- Stop when the seal is compressed and snug against the sheet. Overdriving squashes the seal and can dent the sheet; underdriving leaves a leak path.
- Sweep the metal swarf off the roof at the end of each day: it rusts and stains the sheet.
Roofing screws in Adelaide
Allmat supplies roofing and cladding screws in every common size and colour to roofers, shed builders and trade across Adelaide and South Australia. Add them to a quote with the rest of your list, and we will price the lot.
Roofing screws for re-roofs, sheds and cladding
Roofing and cladding screws in every common size, coating and COLORBOND steel colour are available to order from Allmat for roofers, shed builders, builders and trade across Adelaide and South Australia. Order through Allmat, we pick and pack it, then click and collect from the Allmat yard or have it delivered to site.
Goes with
Questions
What screws do I use for a COLORBOND roof?
A roofing screw with a sealing washer and a head painted to match the roof colour, in Class 4 or X9 coating for most Adelaide sites. Use a metal point into steel battens and purlins, or a Type 17 into timber battens.
What is a cyclone multiseal screw?
A 14 gauge roofing screw with a 25mm aluminium washer and bonded EPDM seal that suits all roof profiles, made for high wind areas and re-roofing. It was tested at the James Cook University Cyclone Testing Station.
Class 4 or X9 roofing screws?
Both suit most Adelaide sites. X9 carries a longer warranty: 30 years in C2 urban and inland areas and 25 in C3 moderate marine and industrial areas, against 25 and 20 years for Class 4.
What roofing screws should I use near the beach?
X9 or stainless bi-metal. Class 3 is not recommended in severe marine (C4) areas, and only 316 bi-metal is covered for very severe marine (C5) sites.
Do roofing screws come in colours?
Yes, painted to match the COLORBOND steel colour range, plus unpainted.
Where can I buy roofing screws in Adelaide?
Order through Allmat. Order ahead by phone on 1300 03 03 63 or send your list for a quote, then click and collect from 25 Kapara Road, Gillman, or have them delivered to site.
Roofing & Cladding Screws: sizes and finishes we supply
645 lines by type and finish. Pick one above for its product code and pack sizes.
| Head | Finish | Sizes | Lengths | Lines |
|---|---|---|---|---|
| Cyclone multiseal | X9 Coating | #14-10, #14-14 | 55 to 230mm (9 lengths) | 324 |
| Cyclone multiseal, Type 17 (timber) | Class 4 | #14-10, #16-10 | 50, 55, 65, 75, 90, 125, 150, 175mm | 206 |
| Cyclone multiseal | Class 4 | #12-24, #14-10 | 50, 53, 65mm | 105 |
| Hex + seal | Bi-Metal 304 Stainless | #12-14, #14-14 | 25, 35, 52, 70, 95mm | 6 |
| Cyclone multiseal | 316 Stainless | #14-10 | 50, 65mm | 2 |
| Hex | X9 Coating | M10.5-09 | 25 | 1 |
| Hex | Zinc Plated | M10.5-09 | 25 | 1 |
Data sheets and documents
The documents for the product you choose are listed with the selector above. Here is every Roofing & Cladding Screws document from Hobson Engineering.
All Roofing & Cladding Screws documents (21)
Data sheets and technical data (12)
- X9 ProteXion BDX Self Drilling Screws - Product Release
- Metal SDS Aluminium Hex Head + Seal + Bi-FiX Screw #12-14 R10 Performance Data
- Metal SDS Aluminium Hex Head + Seal + Bi-FiX Screw #14-14 R10 Performance Data
- BDX Metal Cyclone - Multiseal
- BDX Metal Cyclone - Multiseal
- Metal SDS Cyclone - Multiseal
- BDX - X9 ProteXion Corrosivity Categories
- Bi-FiX Screws
- Product Finish Comparison
- Screw Technical Data Chart - A1 Poster
- Self-Drilling Screws Features and Identification
- Colorbond Comparison Chart - User Guide
Did You Know flyers (2)
Need them in bulk?
Add the sizes you need to your quote, or send us your list and we’ll price the lot and supply it with the rest of your order.
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