Gutter Guard for Trimdek Roof: The 2026 Property Owner’s Buying Guide

Trimdek® and other flat-pan metal roof profiles require a gutter guard system designed around their wide pans and raised ribs. A generic corrugated-roof kit may use the wrong fixing method, while an unsupported roll of mesh can sag, move or leave gaps around the roof edge.

The appropriate Leaf Stopper solution for supported flat-based metal roof profiles is DEKGUARD™. Instead of using corrugated saddles or DEKAFast saddles, DEKGUARD™ uses Gripit brackets fixed to the flat pans of the roof.

This guide explains how to choose a gutter guard for flat pan roof profiles, how DEKGUARD™ differs from DEK-762™, which mesh option to select and what to check before ordering a kit for Trimdek® or another compatible metal roof.

What Is a Flat-Pan Roof Profile?

A flat-pan metal roof profile has raised ribs separated by relatively broad, flat sections known as pans. Rainwater travels through these pans toward the gutter.

Trimdek® is a well-known example, but it is not the only flat-based roof profile used in Australia. Similar products are produced by several roofing manufacturers, with differences in:

• Rib height
• Rib shape
• Pan width
• Sheet cover width
• Spacing between ribs
• Roof-sheet fastening method

These differences influence where the gutter guard can be fixed and how many Gripits are required along each metre of gutter.

Flat-Pan Does Not Mean Flat Roof

A flat-pan roof profile is not necessarily installed on a completely flat roof. The term describes the shape of the metal roof sheet between its ribs.

The roof will still be installed with a suitable pitch according to the profile, building design and manufacturer’s requirements.

Why Profile Identification Matters

Two roof profiles can look similar from the ground but have different pan widths, rib spacing and fastening requirements.

Choosing a system by appearance alone may result in:

• The wrong Gripit configuration
• Insufficient fixing points
• Mesh positioned over unsupported areas
• Difficulty maintaining a suitable mesh slope
• Gaps around the roof edge
• Ordering the wrong product variant

Before purchasing, confirm the roof manufacturer and profile name wherever possible.

Why Trimdek Needs a Profile-Specific System

Traditional corrugated roofs have rounded corrugations that can be fitted with components designed to sit on their high points. Trimdek® has broader flat pans and more angular ribs, so it requires a different approach.

A generic corrugated gutter guard system may not provide suitable fixing points on a Trimdek® roof. Similarly, laying flexible mesh loosely across the ribs can create unsupported sections that move or sag.

A purpose-designed gutter guard for flat pan roof profiles should use fixing points located on the flat pans rather than attempting to force corrugated saddles onto an incompatible rib shape.

Common Problems with Generic Mesh

A generic or loosely fitted product may:

• Sag between roof ribs
• Move during wind or storms
• Leave openings around the roof edge
• Create low areas where debris can collect
• Make downpipe inspection more difficult
• Use fasteners or components not designed for the profile

The fact that a mesh roll is wide enough to cover the gutter does not mean it is suitable for the roof.

Why In-Gutter Inserts Are Different

Foam, brush and other insert-style products sit inside the gutter rather than forming a barrier above it.

These products may leave debris resting in the roof pans and can occupy part of the gutter channel. Fine sediment and decomposing organic material may also collect around the insert.

DEKGUARD™ instead spans from the flat roof pans to the external gutter edge, helping reduce larger debris entering the gutter channel.

DEKGUARD™ vs DEK-762™

DEKGUARD™ and DEK-762™ are separate Leaf Stopper systems. Their names are similar, but they use different roof-fixing components.

DEKGUARD™

DEKGUARD™ is designed for supported flat-based metal roof profiles.

It uses:

• Gripits fixed to the flat pans of the roof
• Mesh Shield spanning toward the gutter edge
• Trimets securing the mesh to a compatible external gutter edge
• Colour-matched screws and components where available

Trimdek® is generally treated as a DEKGUARD™ application.

DEK-762™

DEK-762™ is designed for compatible DEK-762-style roof profiles.

It uses:

• Profile-specific DEKAFast saddles
• Mesh Shield secured at the roof ribs
• Trimets at the external gutter edge

DEK-762™ does not use Gripits.

Why the Difference Matters

Ordering DEK-762™ for a Trimdek® roof can result in receiving the wrong roof-fixing components. Ordering DEKGUARD™ for an actual DEK-762-style roof may create the opposite problem.

If you are uncertain, take clear photos showing:

• The complete roof-sheet profile
• The flat pans
• The ribs
• The gutter edge
• Any visible manufacturer markings

Confirm the roof profile before purchasing rather than relying on a rough visual match.

How DEKGUARD™ Works

DEKGUARD™ creates an over-the-gutter protection surface between the roof and the gutter edge.

The Mesh Shield is positioned across the lower roof area and secured to supported flat pans using Gripits. The gutter-side edge is then secured using the appropriate external gutter components.

Gripits on the Flat Pans

Gripits provide dedicated fixing points on the flat sections of supported metal roof profiles.

The number and spacing of Gripits depends on the roof profile. This is why DEKGUARD™ products are organised according to specific manufacturers and profiles rather than supplied as one universal configuration.

Gripits should not be installed based on guesswork. Use the product and installation information applicable to the identified roof profile.

Trimets at the Gutter Edge

For compatible external gutters, Trimets secure the Mesh Shield to the outer gutter edge.

This creates a supported transition between the roof and gutter. Correct tension and positioning are important because overly loose mesh can sag, while incorrectly positioned mesh may affect appearance or create debris collection areas.

How the Mesh Helps Manage Debris

The mesh helps keep leaves, twigs and larger debris above the gutter channel.

A correctly installed sloping surface may allow dry debris to move away under suitable wind and weather conditions. However, no system can guarantee that every leaf will automatically blow off.

Wet leaves, branches and matted organic matter may still require periodic removal.

Compatible Flat-Pan Roof Profiles

DEKGUARD™ supports a range of flat-based metal roofing profiles from major Australian roofing manufacturers.

Examples may include selected profiles from Lysaght, Metroll and Stramit, such as:

• Trimdek®
• Klip-Lok 406
• Klip-Lok Classic 700
• Klip-Lok 700 Hi-Strength
• Spandek
• Flatdek
• Flatdek II
• Longline 305
• Integrity 820
• Spanrib
• Metlok 700
• Metlock Cyclonic 680
• Hi-Deck 650
• Metrospan
• Spanplus 500
• Speed Deck 500
• Speed Deck Ultra
• CapacityPlus 660
• Megaclad
• Monoclad
• Longspan

This list does not mean every DEKGUARD™ kit is interchangeable across all profiles.

The exact manufacturer and profile should be selected because each product may require a different Gripit arrangement.

Do Not Assume Every Square-Rib Roof Is Trimdek®

“Trimdek” is sometimes used informally to describe several square-ribbed metal roofs, but the roof may actually be a different branded profile.

Using the correct profile name helps ensure you receive:

• The correct Gripit quantity
• The appropriate fixing layout
• Relevant installation information
• A system intended for that roof geometry

Where to Find the Profile Name

The roof profile may be identified through:

• Original building plans
• Roof installation invoices
• Manufacturer documentation
• Markings on accessible roof sheets
• Measurements of the ribs and pans
• Assessment by a roofing professional

If identification remains uncertain, contact Leaf Stopper with measurements and clear photographs before ordering.

Choosing the Right Mesh

Once the roof profile is confirmed, choose the appropriate Mesh Shield option.

Standard Mesh

Standard Mesh has a 3.5mm x 3.5mm aperture and is manufactured from 0.55mm aluminium.

It is designed for general leaf and larger debris protection.

Standard Mesh may suit properties surrounded primarily by broader leaves and where BAL-rated mesh is not required.

Premium Mesh

Premium Mesh uses the same 3.5mm x 3.5mm aperture as Standard Mesh but is manufactured from 0.80mm aluminium.

It is approximately 46% thicker than Standard Mesh and may be selected where greater mesh strength and durability are preferred.

Premium Mesh is not a finer-aperture mesh. Its main difference is its increased aluminium thickness.

Fine Mesh

Fine Mesh has a 1.8mm x 1.8mm woven aperture and is manufactured from 0.40mm aluminium.

It is designed to help reduce smaller debris such as:

• Pine needles
• Fine seeds
• Small leaf matter
• Some blossoms and narrow organic debris

Fine Mesh is also the BAL-rated mesh option within the Leaf Stopper range.

Will Fine Mesh Stop All Silt?

No. Dust, pollen and microscopic sediment can still pass through mesh with rainwater or settle on the mesh surface.

Fine Mesh can reduce smaller physical debris, but it does not make the gutter maintenance-free.

For a broader comparison of materials, read Aluminium vs Plastic Gutter Guard: Which Is Best for Australian Conditions?

Bushfire and BAL Considerations

Material and aperture selection become especially important when the property is in a bushfire-prone area.

Leaf Stopper Standard, Premium and Fine Mesh are made from non-combustible aluminium. However, only Fine Mesh is the BAL-rated option in the Leaf Stopper range.

Fine Mesh Aperture

Fine Mesh has a 1.8mm x 1.8mm woven aperture.

Where mesh is being used as an ember guard or to protect openings, a maximum 2mm aperture is commonly required. The exact requirements depend on the building, BAL assessment, application and approval pathway.

Non-Combustible Does Not Automatically Mean BAL-Rated

Standard and Premium Mesh are non-combustible, but their 3.5mm x 3.5mm aperture means they are not the BAL-rated mesh products within the range.

Do not select Premium Mesh for bushfire compliance simply because it is thicker. Aperture size and the specific product application must also be considered.

Confirm Your Project Requirements

Before ordering gutter guard for a BAL-rated property, confirm the requirements with an appropriate builder, certifier, bushfire consultant or local authority.

Visit the Leaf Stopper Bushfire Protection page and read the BAL 29 Gutter Guard Buying Guide for more information.

Measuring and Ordering DEKGUARD™

Ordering the correct DEKGUARD™ system requires more than measuring the total gutter length.

You should record:

• Total linear metres of external gutter
• Roof manufacturer
• Roof profile name
• Number of separate gutter runs
• Internal and external corners
• Roof valleys where applicable
• Downpipe locations
• Possible EasyAc access locations
• Preferred mesh type
• Preferred colour
• Whether BAL-rated Fine Mesh is required

Measure Each Roof Section Separately

A property may contain more than one roof profile. For example, the main roof may be Trimdek® while a verandah uses traditional corrugated roofing.

Measure and label each profile separately because the verandah may require CORROGUARD® while the Trimdek® section requires DEKGUARD™.

Allow for Cuts and Overlaps

Allow some additional mesh for joins, corners, trimming and installation cuts.

Around 10% is a common planning allowance for DIY projects, but the appropriate amount depends on the roof complexity and number of short runs or corners.

Use Clear Roof Photos

Take photographs showing:

• The roof ribs and flat pans
• The gutter edge
• The full lower section of the roof sheet
• Corners and valleys
• Downpipe locations
• Any roof transitions

For a complete measuring process, read How to Measure for Gutter Guards: A Practical Guide for Australian Roofs.

Installation Considerations

DEKGUARD™ installation should follow the instructions for the selected manufacturer and roof profile.

The general process involves positioning Mesh Shield from the flat roof pans to the gutter edge, securing the roof side with Gripits and securing the gutter side with the applicable external gutter components.

Prepare the Roof and Gutter First

Before installing gutter guard:

• Remove existing leaves and debris
• Clean accumulated gutter sediment
• Check that downpipe openings are clear
• Inspect the gutter for damage or incorrect fall
• Check the lower roof sheets for existing damage
• Address known drainage or roof defects

Gutter guard should not be installed over an unresolved drainage, corrosion or roof-leak problem.

Do Not Fix Gripits to the Roof Ribs

Gripits are designed for supported flat pans on compatible profiles. They are not DEKAFast saddles and should not be described or installed as rib saddles.

Use the Gripit quantity and spacing specified for the selected roof profile.

Maintain a Supported Mesh Surface

The Mesh Shield should be positioned so it forms a supported transition between the roof and gutter edge.

Avoid:

• Loose mesh sagging deeply into the pans
• Unsupported fixing arrangements
• Large gaps at the ends of gutter runs
• Obstructing downpipes or overflows
• Walking or placing concentrated weight on the mesh

DIY vs Professional Installation

DIY installation may be suitable for confident property owners with a safely accessible, compatible roof and the correct tools.

Professional installation is generally more appropriate for:

• High or steep roofs
• Multi-storey properties
• Commercial and industrial buildings
• Complex roof transitions
• Large or difficult-to-access gutter runs
• Projects requiring certification
• Anyone not equipped for safe work at height

Review the Leaf Stopper installation instructions before beginning.

Maintenance and EasyAc Access

DEKGUARD™ helps reduce the amount of leaves and larger debris entering the gutter, but no gutter guard is completely maintenance-free.

Periodic checks may still be required for:

• Branches resting on the mesh
• Wet or matted surface debris
• Fine sediment inside the gutter
• Loose components
• Damage after storms
• Downpipe restrictions
• Debris collected around roof valleys or corners

EasyAc Gutter Access Panels

The EasyAc gutter access panel creates a removable inspection point within a Leaf Stopper Mesh Shield installation.

EasyAc may be positioned near:

• Downpipe outlets
• Long gutter runs
• Gutter corners
• Areas beneath heavy vegetation
• Locations where sediment is likely to collect

It can make it easier to inspect the gutter, check the entrance to a downpipe and direct a garden hose into the gutter channel without removing a long section of mesh.

EasyAc cannot clear a blockage located further down a downpipe or inside an underground stormwater line.

Inspect According to Property Conditions

There is no single maintenance schedule that suits every Trimdek® roof.

Inspection frequency depends on:

• Nearby vegetation
• Seasonal leaf and seed drop
• Dust exposure
• Recent storms
• Roof pitch and design
• Bushfire preparation requirements

Read the honest gutter guard maintenance guide for more detail.

Flat-Pan Roof Gutter Guard Buying Checklist

Before ordering DEKGUARD™ for a Trimdek® or similar flat-pan roof, confirm the following:

• The roof has a supported flat-based metal profile.
• The manufacturer and exact profile name have been identified.
• The required gutter length has been measured.
• The correct DEKGUARD™ profile variant has been selected.
• The appropriate Gripit quantity is included.
• The gutter edge is compatible with the required components.
• Corners, valleys and roof transitions have been identified.
• Downpipe and possible EasyAc locations have been planned.
• Standard, Premium or Fine Mesh has been selected.
• BAL requirements have been checked where applicable.
• The preferred powder-coated colour has been selected.
• Safe DIY installation or professional installation has been considered.

Choose the Correct System for Your Flat-Pan Roof

A Trimdek® roof should not be treated as a traditional corrugated roof or automatically assumed to require DEK-762™.

For supported flat-pan metal profiles, DEKGUARD™ uses Gripits fixed to the roof pans and the appropriate components at the external gutter edge.

The exact product depends on the manufacturer and profile because Gripit spacing varies between roof systems.

Explore the DEKGUARD™ system, browse Leaf Stopper gutter guard kits or find a professional installer for a high, steep or complex roof.

Frequently Asked Questions

What gutter guard should I use on a Trimdek® roof?

Trimdek® is generally a DEKGUARD™ application because it is a supported flat-pan metal roof profile. Confirm the exact manufacturer and profile before ordering.

Does Trimdek® use DEK-762™ gutter guard?

No. Trimdek® and DEK-762 are different roof profiles. DEKGUARD™ uses Gripits on flat pans, while DEK-762™ uses DEKAFast saddles on compatible ribs.

Does DEKGUARD™ use saddles?

No. DEKGUARD™ uses Gripits fixed to supported flat roof pans. Corrugated saddles belong to CORROGUARD®, while DEKAFast saddles belong to DEK-762™.

How is DEKGUARD™ fixed to the gutter?

For compatible external gutters, Trimets secure the Mesh Shield to the gutter edge. The roof side is secured with Gripits.

Is every square-ribbed roof a Trimdek® roof?

No. Several manufacturers produce similar-looking flat-based roof profiles. Identify the manufacturer and profile rather than relying only on appearance.

How do I identify my roof profile?

Check building plans, invoices or manufacturer markings. You can also take detailed measurements and photographs or ask a roofing professional to identify it.

What mesh is best near pine trees?

Fine Mesh may be preferable where pine needles, small seeds or other narrow debris are common. It has a 1.8mm x 1.8mm woven aperture.

Which Leaf Stopper mesh is BAL-rated?

Fine Mesh is the BAL-rated option in the Leaf Stopper range. Standard and Premium Mesh are non-combustible aluminium but are not BAL-rated.

Is Premium Mesh finer than Standard Mesh?

No. Both use a 3.5mm x 3.5mm aperture. Premium Mesh uses thicker 0.80mm aluminium, compared with 0.55mm Standard Mesh.

Will DEKGUARD™ stop all birds and pests?

A correctly installed system can help reduce access around the protected roof and gutter edge, but no gutter guard can guarantee complete pest exclusion throughout the entire building.

Can aluminium mesh cause a steel roof to rust?

Roof compatibility, coating condition, fasteners, environmental exposure and installation detail all matter when different building materials are used together. Do not rely on gutter guard as a treatment for existing roof corrosion.

Does DEKGUARD™ stop gutters from needing maintenance?

No. It helps reduce leaves and larger debris entering the gutter, but surface debris, dust and fine sediment may still require periodic inspection or cleaning.

Can EasyAc be used with DEKGUARD™?

Yes. EasyAc can provide a removable inspection point within a Leaf Stopper Mesh Shield installation, including near downpipe outlets and other important maintenance areas.

Can I install DEKGUARD™ myself?

DIY installation may be possible on a compatible, safely accessible roof. Professional installation is recommended for high, steep, complex, commercial or difficult-to-access roofs.