145 products
Roofing & Construction Screws
roofing-construction-screws
TIMCO Self-Drilling Heavy Section A2 Stainless Steel Bi-Metal Drill Screw - 5.5 x 55 (100pcs)
- Pack quantity
- 100 Pieces
- Price
- £40.04Incl. VAT
TIMCO Self-Drilling Light Section Silver Drill Screw with EPDM Washer - 5.5 x 50 (100pcs)
- Pack quantity
- 100 Pieces
- Price
- £4.60Incl. VAT
TIMCO Sheet Steel Stitching Screws with EPDM Washer - 6.3 x 22 (100pcs)
- Pack quantity
- 100 Pieces
- Price
- £4.15Incl. VAT
TIMCO Slash Point Sheet Metal to Timber Drill Screw Silver with EPDM Washer - 6.3 x 45 (100pcs)
- Pack quantity
- 100 Pieces
- Price
- £5.54Incl. VAT
TIMCO Self-Drilling Heavy Section Silver Drill Screw - 5.5 x 38 (100pcs)
- Pack quantity
- 100 Pieces
- Price
- £5.47Incl. VAT
TIMCO Self-Drilling Fiber Cement Board Exterior Silver Screw with BAZ Washer - 6.3 x 130 (50pcs)
- Pack quantity
- 50 Pieces
- Price
- £21.89Incl. VAT
TIMCO Slash Point Sheet Metal to Timber Drill Screw Exterior Silver with EPDM Washer - 6.3 x 32 (120pcs)
- Pack quantity
- 120 Pieces
- Price
- £9.30Incl. VAT
TIMCO Slash Point Sheet Metal to Timber Drill Screw Silver with EPDM Washer - 6.3 x 32 (100pcs)
- Pack quantity
- 100 Pieces
- Price
- £4.81Incl. VAT
TIMCO Self-Drilling Wing-Tip Steel to Timber Light Section Exterior Silver Screws - 5.5 x 85 (100pcs)
- Pack quantity
- 100 Pieces
- Price
- £9.50Incl. VAT
TIMCO Self-Drilling Heavy Section Silver Drill Screw- 5.5 x 100 (100pcs)
- Pack quantity
- 100 Pieces
- Price
- £11.90Incl. VAT
TIMCO Self-Drilling Heavy Section Silver Drill Screw with EPDM Washer - 5.5 x 65 (100pcs)
- Pack quantity
- 100 Pieces
- Price
- £9.71Incl. VAT
TIMCO Self-Drilling Heavy Section A2 Stainless Steel Bi-Metal Drill Screw with EPDM Washer - 5.5 x 38 (100pcs)
- Pack quantity
- 100 Pieces
- Price
- £39.11Incl. VAT
TIMCO Self-Drilling Heavy Section A2 Stainless Steel Bi-Metal Drill Screw - 5.5 x 38 (100pcs)
- Pack quantity
- 100 Pieces
- Price
- £34.91Incl. VAT
TIMCO Self-Drilling Heavy Section Silver Drill Screw with EPDM Washer - 5.5 x 80 (100pcs)
- Pack quantity
- 100 Pieces
- Price
- £8.90Incl. VAT
TIMCO Self-Drilling Light Section Silver Drill Screw with EPDM Washer - 5.5 x 70 (100pcs)
- Pack quantity
- 100 Pieces
- Price
- £5.82Incl. VAT
TIMCO Self-Drilling Light Section Silver Drill Screw with EPDM Washer - 5.5 x 25 (100pcs)
- Pack quantity
- 100 Pieces
- Price
- £3.28Incl. VAT
TIMCO Self-Drilling Light Section Silver Drill Screw - 10 x 3/4 (1000pcs)
- Pack quantity
- 1000 Pieces
- Price
- £17.74Incl. VAT
TIMCO Slash Point Sheet Metal to Timber Drill Screw Exterior Silver with EPDM Washer - 6.3 x 25 (100pcs)
- Pack quantity
- 100 Pieces
- Price
- £6.17Incl. VAT
TIMCO Slash Point Sheet Metal to Timber Drill Screw Silver with EPDM Washer - 6.3 x 25 (100pcs)
- Pack quantity
- 100 Pieces
- Price
- £4.32Incl. VAT
TIMCO Self-Drilling Wing-Tip Steel to Timber Light Section Silver Drill Screw - 4.2 x 38 (200pcs)
- Pack quantity
- 200 Pieces
- Price
- £5.45Incl. VAT
TIMCO Self-Drilling Wing-Tip Steel to Timber Light Section Silver Drill Screw - 5.5 x 65 (120pcs)
- Pack quantity
- 120 Pieces
- Price
- £9.30Incl. VAT
TIMCO Self-Drilling Wing-Tip Steel to Timber Light Section Silver Screws - 5.5 x 150 (100pcs)
- Pack quantity
- 100 Pieces
- Price
- £17.35Incl. VAT
TIMCO Self-Drilling Wing-Tip Steel to Timber Light Section Exterior Silver Screws - 5.5 x 50 (200pcs)
- Pack quantity
- 200 Pieces
- Price
- £10.75Incl. VAT
TIMCO Self-Drilling Fiber Cement Board Exterior Silver Screw with BAZ Washer - 6.3 x 110 (50pcs)
- Pack quantity
- 50 Pieces
- Price
- £18.98Incl. VAT
Roofing & Construction Screws For Trade Projects
Fix metal sheets, cladding panels, and timber structures with confidence. Our range of roofing and construction screws is built for demanding site conditions across the UK.
From self-drilling heavy section screws to slash point sheet metal fixings, every product in this collection is stocked in our UK warehouse and ready for rapid trade dispatch.
What Makes A Good Roofing Screw
Roofing screws are specialist fasteners. They are designed to fix metal sheeting, cladding, and roofing panels to timber or steel supports.
A good roofing screw must do three things well. It must drill cleanly without pre-drilling. It must hold firmly under wind load and movement. And it must seal the fixing point against water ingress.
Key Features To Look For In Every Fixing:
• Self-Drilling Tip: Cuts its own hole on contact. No pilot drill needed. Saves time on site.
• EPDM Washer: The rubber washer compresses under the hex head. It creates a permanent, weathertight seal at every fixing point.
• Hex Head Drive: Allows high-torque driving with an impact driver or screw gun. Reduces cam-out and stripping.
• Corrosion-Resistant Finish: Silver organic, zinc-plated, or A2 stainless steel. The right finish extends the life of the fixing in outdoor conditions.
Types Of Fixings In This Collection
We stock a full range of self-drilling and self-tapping fixings for metal roofing, cladding, and general construction. Choose the right type for your material and section thickness.
Heavy Section Self-Drilling Screws
Designed to drill into thick steel sections. These heavy-duty steel screws use a No.5 drill point and are rated for steel up to 12mm thick.
- Industrial portal frames and steel buildings
- Fixing sheeting rails to thick structural steel
- Heavy-gauge metal cladding installations
Light Section Self-Drilling Screws
Engineered for thinner steel sections between 1.2mm and 3.6mm. Fast-drilling and reliable for standard roofing and cladding work.
- Purlins and thin steel sheeting rails
- Corrugated roofing sheet to light steel
- Agricultural and commercial cladding
Slash Point Sheet Metal To Timber Screws
Slash point screws have a notched tip for piercing thin sheet metal before threading into the timber below. They include EPDM washers for a watertight seal.
- Thin metal sheet to timber joist fixing
- Corrugated roof panel installations
- Agricultural roofing and outbuildings
Wing-Tip Steel To Timber Screws
Wing-tip screws drill cleanly through metal sheet and then break off the wings as they enter timber. This ensures a tight, clean thread pull-down into the timber below.
- Metal roofing sheets to timber rafters
- Light section steel sheet to timber purlin
- Mezzanine and storage structure decking
Stainless Steel Bi-Metal Drill Screws
Bi-metal screws combine a hardened carbon steel drill point with an A2 stainless steel body. They are ideal for fixing cladding where corrosion resistance is critical.
- Coastal and high-humidity environments
- Cedar, larch, and tanalised timber cladding
- Long-term exterior roofing and facades
Stitching Screws for Sheet-to-Sheet
Stitching screws join overlapping metal sheets together at the seam. They use a self-drilling tip and EPDM washer to seal the lap joint against water.
- Lapping corrugated metal roof sheets
- Side laps on metal wall cladding panels
- Sheet-to-sheet joints on purlins
How To Pick The Right Size
Using the wrong size screw is one of the most common mistakes on site. Too short and the fixing lacks holding power. Too long and the tip can damage insulation or protrude unsafely.
The Trade Rule For Roofing Screw Length:
For sheet metal to timber fixing, the screw must pass fully through the metal sheet and embed at least 25mm into the timber below. For steel to steel fixing, the drill point must fully penetrate the base steel before the thread engages.
Standard Sizes And Their Trade Applications
| Size (Diameter x Length) | Point Type | Typical Site Application |
|---|---|---|
| 5.5mm x 25mm / 32mm | Self-Drilling / Light Section | Thin corrugated sheet to light-gauge steel purlins. |
| 5.5mm x 38mm / 50mm | Self-Drilling / Heavy or Light Section | Standard roofing sheet to steel frame. Most common trade size. |
| 5.5mm x 65mm / 80mm | Self-Drilling / Heavy Section | Deep fixing through insulated panels or composite roof cladding. |
| 6.3mm x 32mm / 45mm | Slash Point | Thin sheet metal to timber rafters and battens. |
| 4.2mm x 32mm / 38mm | Wing-Tip / Light Section | Light steel sheet to timber purlin. Clean pull-down fixing. |
| 5.5mm x 85mm / 100mm | Wing-Tip / Heavy Section | Heavy steel sheet to large-section timber or deep substrate. |
Need fixings for timber framing or internal joinery? Browse our range of structural timber screws for the right fixing every time.
Finishes, Coatings, And Material Options
The right coating protects the screw from the environment it is working in. Choosing the correct finish is just as important as choosing the right size.
Silver Organic Exterior Finish
A high-performance exterior coating applied to the screw body. It provides strong corrosion resistance for outdoor roofing and cladding applications without staining the metal sheet.
Zinc-Plated Finish
Standard electroplated zinc coating for general construction use. Suitable for internal and sheltered external applications where moisture exposure is moderate.
A2 Stainless Steel Body
Offers full rust resistance in corrosive and coastal environments. The stainless steel construction screws in this range use bi-metal construction for the strength to drill through steel.
16mm EPDM Bonded Washer
The EPDM rubber washer is bonded to an aluminium or steel flange. It compresses under the hex head and forms a permanent seal. Always use EPDM washers on any exposed fixing point.
Choosing The Right Screw By Application
| Site Application | Recommended Screw Type | Recommended Finish |
|---|---|---|
| Metal Roofing Sheet To Heavy Steel | 5.5mm x 38mm Heavy Section Self-Drilling With EPDM | Silver Organic Exterior |
| Metal Roofing Sheet To Light Steel | 5.5mm x 38mm Light Section Self-Drilling With EPDM | Silver Organic Exterior |
| Thin Sheet Metal To Timber Rafter | 6.3mm x 45mm Slash Point With EPDM | Silver Organic Exterior |
| Steel Sheeting To Timber Purlin | 4.2mm x 38mm Wing-Tip Light Section | Zinc Plated |
| Sheet To Sheet Lapping At Seams | 5.5mm x 25mm Stitching Screw With EPDM | Silver Organic Exterior |
| Exterior Cladding In Coastal Areas | 5.5mm x 38mm A2 Stainless Bi-Metal With EPDM | A2 Stainless Steel |
| Composite Insulated Panel Fixing | 5.5mm x 65mm to 80mm Heavy Section Self-Drilling | Silver Organic Exterior |
Installation Tips For A Clean, Weathertight Fix
Getting the fixing right matters as much as choosing the right screw. Follow these trade-proven steps to avoid leaks, stripped heads, and pull-through.
- Use A Screw Gun With A Depth-Limiting Nose: This prevents over-torquing. Over-tightening damages the EPDM washer and creates a leak point.
- Drive At 90 Degrees To The Sheet: An angled screw will not seal correctly. The washer must sit flat and square on the roofing sheet surface.
- Fix Through The Crest Of The Corrugation: Always fix through the high point of a corrugated sheet. Fixing in the valley traps water around the fastener.
- Do Not Reuse Roofing Screws: The EPDM washer takes a compression set on first use. Removing and refitting a screw breaks the seal permanently. Always use a new screw.
- Match The Drill Point To The Steel Thickness: A light section screw will not drill cleanly through heavy steel. Always check the section rating before ordering.
Frequently Asked Questions
What Are Roofing And Construction Screws Used For?
Roofing and construction screws are used to fix metal sheets, cladding panels, and timber to steel or timber supports. They are designed for outdoor use and built to resist wind loads, rain, and temperature changes.
What Is The Difference Between Light Section And Heavy Section Screws?
Light section screws are designed for fixing into steel up to around 3mm thick. Heavy section screws are engineered for thicker steel sections, typically up to 12mm. Always match the screw type to the thickness of the steel you are drilling into.
Do I Need EPDM Washers On My Roofing Fixings?
Yes. EPDM washers create a watertight seal around the screw head. They compress under the hex head during installation and prevent water from entering through the fixing point. They are essential for any exposed roofing or cladding application.
What Is The Difference Between A Self-Drilling And A Slash Point Screw?
A self-drilling screw has a drill-bit tip that cuts its own hole as it drives in. A slash point screw has a notched tip designed for thin sheet metal to timber fixing. Slash point screws are not suitable for thick steel sections.
UK Trade Supply And Fast Site Delivery
At JALFT, we supply roofing contractors, builders, and cladding specialists across the UK. All products are supplied by TIMCO and stocked in our UK warehouse.
Orders placed before 2pm are dispatched the same day for next-day site delivery. Trade packs of 100 to 200 screws per box keep your site stocked without waste.
Need fixings for other site applications? Explore our full range of collated screws for timber boarding and drylining, or browse our complete fastener catalogue for comprehensive site coverage.
Summary: Our roofing and construction screws are stocked in trade pack quantities. Self-drilling tips, EPDM watertight washers, and corrosion-resistant finishes ensure reliable performance on every roofing and cladding project across the UK.