Sealed Fixings for Roofing, Cladding & Steel or Timber Supports

A roofing or cladding screw has to do more than hold the sheet in place. It needs to suit the material underneath, engage correctly through the assembly & provide the required seal around the penetration. ICCONS® | Metal/Timber Washered Hex Screws includes purpose-developed fasteners for fixing metal roof sheet, wall cladding & architectural panels to compatible steel or timber supports. With universal-point designs, EPDM sealing washers, low-profile options & painted finishes available across applicable families, installers can choose a fixing around the actual building-envelope application rather than relying on one general-purpose screw.

Roofers, cladding installers, builders, shed erectors, fabricators & maintenance crews should identify the sheet or panel first then confirm whether it is being fixed to steel or timber. From there, screw length, steel drilling capacity where applicable, washer configuration, head style, corrosion protection & colour can be checked before installation begins.

For associated fixing requirements, browse Screws & Anchors, compare Bolts & Fasteners for wider fastening hardware or visit Power Tool Accessories for related driving equipment.

► Wall-Stars for wall cladding
► Roof-Stars for metal roof sheet
► Design-Stars for low-profile panel fixing
► Universal-point options for compatible steel or timber
► EPDM sealing washers
► Painted variants across selected families
► Steel purlin & timber batten applications
► Residential, commercial, roofing & cladding work

What Are Metal/Timber Washered Hex Screws?

ICCONS metal/timber washered Hex screws combine several functions within one fastener.

The screw provides the mechanical connection between the sheet or panel & its supporting material. A Hex head gives the installer an external driving surface while an EPDM washer provides a sealing element around the penetration on applicable configurations.

Universal-point families add another useful characteristic: selected screws can be installed into compatible steel or timber supports.

Depending on the application, the ICCONS range includes purpose-developed families such as:

► Wall-Stars
► Roof-Stars
► Design-Stars with Sealing Washer
► Painted Wall-Stars
► Painted Roof-Stars
► Painted Design-Stars
► Other specialised roofing & cladding configurations across the wider ICCONS range

The correct choice depends on what is being attached, what sits behind it & the conditions the completed fixing will face.

What's Behind the Sheet?

Two identical sheets can require different installation considerations when one is supported by steel & the other by timber.

Steel Support

When the screw is entering steel, check:

► Supporting steel thickness
► Drilling capacity of the exact screw
► Sheet or panel thickness
► Required screw length
► Washer configuration
► Head size
► Required finish

Timber Support

When the same type of sheet is being fixed to timber, consider:

► Timber condition
► Required screw penetration
► Sheet or panel thickness
► Screw length
► Washer seating
► Head configuration
► Exposure conditions

A universal point provides useful flexibility across compatible substrate types but the complete connection still needs to suit the exact fastener.

Wall-Stars Put Wall Cladding First

A long run of external wall cladding leaves every fixing visible to weather, installation conditions & often the eye.

ICCONS Wall-Stars are designed for cladding installation to compatible:

► Thin metal battens
► Steel purlins
► Timber battens

Applicable washered Wall-Stars combine a universal self-drilling point, flanged Hex head & EPDM sealing washer.

This makes them particularly useful for crews moving between steel-supported & timber-supported cladding projects.

A documented 13-11 x 25 Wall-Star configuration uses a 5/16" Hex head & is specified for 0.55–1.90 mm steel.

Painted Wall-Stars are also available across selected configurations where the visible fixing needs to coordinate with the cladding.

For façade work, substrate compatibility, sealing & appearance can all matter at the same fixing point.

Roof-Stars Are Made for Metal Roof Sheet

A roof fixing works in a different position from a wall-cladding screw.

ICCONS Roof-Stars are designed for attaching metal roof sheet to compatible:

► Thin metal battens
► Steel purlins
► Timber battens

Applicable Roof-Stars combine a universal point with an EPDM sealing washer & features intended specifically for roof-sheet installation.

The documented family includes configurations using a 5/16" Hex head, with applicable variants specified for steel within their stated drilling range.

For roofing crews, selection should account for:

► Roof-sheet profile
► Supporting material
► Steel thickness where applicable
► Screw length
► Fixing position
► Washer condition
► Finish or colour
► Driver setup

Roofing is a defined fixing application, so use a screw configuration intended for the sheet & support arrangement being installed.

Wall-Star, Roof-Star or Design-Star?

Similar-looking screws can have different jobs.

The application should identify the family before dimensions & colour narrow the final choice.

For practical guidance on why the fixing itself matters as much as the equipment installing it, read Why Good Fasteners Matter More Than the Tool You Drive Them With.

Give the EPDM Washer Room to Do Its Job

The washer beneath the head is a functional part of the completed fixing.

On applicable ICCONS products, EPDM provides a sealing element around the penetration.

Installation therefore needs to leave the washer correctly positioned against the sheet or panel.

Before moving to the next fixing, look for:

► Consistent washer seating
► Square screw alignment
► Appropriate contact with the sheet
► No obvious loose fixing
► No unnecessary washer distortion
► Correct positioning of the surrounding material

Driving technique matters here.

A screw driven off-angle can leave the washer sitting unevenly while excessive compression can unnecessarily distort the sealing element.

Aim for a consistent installed connection rather than simply driving until the screw will move no further.

Design-Stars Suit Installations Where the Head Remains Part of the Finish

Architectural panels & highly visible cladding can put more attention on the fastener head.

ICCONS Design-Stars provide a low-profile Hex-head option for suitable applications involving light-gauge steel profiles, steel supports or timber.

Applications can include:

► Wall cladding
► Architectural panels
► Flat fixing positions
► Valley fixing
► Fences
► Gates
► Other visible panel installations

Selected Design-Stars are available with EPDM sealing washers while painted versions provide further choice where the fixing remains visible.

A lower-profile head can be particularly useful across finished elevations where hundreds of fixings become part of the overall appearance.

Universal Point Does Not Mean Unlimited Steel Thickness

The ability to work with compatible steel or timber should not be confused with unlimited drilling capacity.

When the supporting material is steel, check the thickness against the specification of the exact screw.

For example, applicable Wall-Star & Roof-Star configurations are documented for 0.55–1.90 mm steel.

Other ICCONS families can have different drilling capabilities.

Before starting on steel supports:

► Confirm the supporting section
► Measure or verify its thickness
► Check the screw's stated capacity
► Account for the material at the fixing position
► Confirm required screw length
► Prepare the correct nut setter

The universal point provides substrate versatility within the screw's specified operating range.

Timber Battens Change What the Installer Needs to Check?

Steel drilling capacity drops out of the equation when the screw is being installed into timber but other considerations become more important.

Review:

► Condition of the timber
► Required penetration
► Sheet or panel thickness
► Overall screw length
► Fixing position
► Washer seating
► Driver control

A universal-point Wall-Star or Roof-Star can give crews useful flexibility when similar external materials are installed across projects using different supporting structures.

For other specialised fastening requirements around construction work, browse Specialty Fasteners & Fixings.

Painted Heads Help Keep Large Elevations Visually Consistent

Consider a finished wall containing hundreds of exposed fastener heads.

Even when every fixing performs correctly, an unsuitable head colour can remain highly noticeable.

ICCONS offers painted variants across selected Wall-Star, Roof-Star & Design-Star families.

Painted options can be useful for:

► Residential façades
► Commercial cladding
► Coloured metal roofing
► Architectural panels
► Fences
► Gates
► Other exposed installations

Colour comes after technical suitability.

First confirm the screw suits the sheet, supporting material, drilling requirement & exposure conditions then select the appropriate available finish.

Roofing Crews Should Check the Whole Assembly Before Driving

On a roof, the fixing passes through the sheet before establishing its connection with the supporting batten or purlin.

That means the installer is dealing with an assembly rather than a single material.

A useful pre-installation check covers:

► Roof-sheet type
► Fixing location on the profile
► Steel or timber support
► Steel thickness where applicable
► Screw dimensions
► EPDM washer
► Finish
► Nut setter
► Driver access

Where several roof areas use different supports or sheet profiles, keep the relevant screw boxes clearly identified.

The easiest fixing to correct is the one that has not yet been installed in the wrong location.

Cladding Crews Need Consistency Across the Elevation

Large façades magnify small installation differences.

Changes in screw angle, washer seating, head colour or fixing position can become more noticeable when repeated across an entire wall.

Before distributing fasteners across the work area, confirm:

► Wall-Star or Design-Star family
► Substrate
► Screw dimensions
► Washer requirement
► Head appearance
► Colour
► Correct driving accessory

For large projects, a clearly defined fastening setup helps different installers work to the same connection requirements.

For crews preparing equipment & consumables before high-volume site work, read Spring Jobsite Prep Getting Your Gear Ready.

Shed Construction Can Combine Roofing, Walls & Steel Supports

Shed projects are a useful example of why application-specific fastener selection matters.

One structure may involve:

► Corrugated roof sheet
► Wall cladding
► Steel purlins
► Light-gauge framing
► Flashings
► Visible external fixings
► Multiple screw lengths

A roofing screw should not automatically become the default fixing for every part of the structure simply because it has a Hex head & sealing washer.

Identify the connection first then choose the ICCONS family intended for that part of the build.

For other steel fastening requirements around the same project, browse  Hex Bolts.

Match the Nut Setter Before Working Across the Roof or Wall

A Hex head provides positive external engagement when the driving accessory is the correct size & in serviceable condition.

Applicable Wall-Star & Roof-Star configurations use 5/16" Hex heads.

Before a large installation run:

► Check the head dimension
► Fit the corresponding nut setter
► Make sure it seats fully
► Inspect for internal wear
► Keep the driver aligned
► Carry a serviceable replacement for repetitive work

For complementary installation equipment, browse Wrenches.

A worn nut setter can make a correctly selected screw unnecessarily difficult to install.

Five Questions Worth Answering Before Installation

What material am I fixing?

Identify whether the job involves roof sheet, wall cladding, an architectural panel or another suitable component.

What is supporting it?

Confirm steel or timber. If it is steel, establish whether its thickness falls within the selected screw's stated drilling capacity.

Does this penetration require a sealing washer?

Check the installation requirement & select the applicable washered configuration.

Will the fixing remain visible?

Head profile, finish & colour may matter across exposed roofing, cladding or architectural work.

Is the driving setup ready?

Match the nut setter to the Hex head & inspect the accessory before repetitive installation begins.

For a broader reference covering common construction fixing types, read the Fastener Guide Bolts Screws Anchors.