EPDM Wall Flashing Trim | 2.5m Length | Aluminium | Wall Abutment

EPDM Wall Flashing Trim | Weatherproof Wall Abutment Solution

Create a professional, watertight seal where your flat roof meets a wall with this powder-coated aluminium wall flashing trim. Essential for extension roofs, lean-to structures, and any EPDM installation that abuts an existing building, this trim ensures water cannot penetrate at the critical wall junction.

🔧 Specifications

✅ Key Benefits

• Weatherproof Seal – Prevents water ingress at wall abutments
• Professional Finish – Clean, defined junction between roof and wall
• Durable Construction – Aluminium won't rust, rot, or degrade
• Easy Installation – Mechanical fix with sealant backing
• Colour Matched – Coordinates with EPDM and modern exterior finishes
• Low Maintenance – No repainting or retreating required
• Building Regs Compliant – Meets requirements for flat roof abutments

🏠 Perfect For

• Extension roofs joining the main house
• Garage roofs against house walls
• Garden rooms and home offices
• Lean-to structures and porches
• Kitchen extensions with flat roofs
• Commercial buildings with parapet walls
• Any roof-to-wall junction requiring weatherproofing

📐 Why Wall Flashing Matters

The junction between a flat roof and a wall is one of the most vulnerable points for water ingress. Without proper flashing:

• Rain runs down the wall and behind the membrane
• Wind-driven rain forces water into small gaps
• Thermal movement creates openings over time
• Damp penetrates into the building structure

This aluminium wall flashing provides a permanent, mechanical barrier that works with the EPDM membrane to create a fully sealed junction.

🛠️ Installation Guide

1. Prepare the Wall – Clean masonry, remove loose material, ensure surface is dry
2. Mark Position – Draw a level line 75-100mm above the roof surface
3. Apply Sealant Backing – Run a continuous bead of silicone along the fixing line
4. Position Flashing – Press into sealant with wall upstand against the wall
5. Mechanical Fix – Drill and plug at 300mm centres, secure with screws
6. Seal Top Edge – Apply another bead of sealant along the top of the flashing
7. Bond EPDM Membrane – Bring membrane up and over the roof overlap section
8. Roll & Seal – Use seam roller to ensure full adhesive contact

📋 Critical Installation Tips

• Height matters – Position flashing minimum 75mm above roof level to prevent splashback issues
• Chase into brick? – For traditional lead-style finish, flashing can be chased into a mortar course
• Corner joints – Use pre-formed corner pieces or carefully mitre-cut and seal corners
• Multiple walls – Calculate all wall lengths and add 10% for overlaps

📦 Calculating Quantities

Each piece covers 2.5 metres of wall length. To calculate:

1. Measure total wall abutment length in metres
2. Divide by 2.5
3. Add 10% for overlaps and wastage
4. Round up to whole number

Example: 6m wall length ÷ 2.5 = 2.4, +10% = 2.6 → Order 3 pieces

🔗 Complete Your EPDM System

For a watertight installation, combine with:

• EPDM Membrane – Main roofing surface
• EPDM Corner Pieces – Internal and external corners
• EPDM Drip Edge – Roof edges over guttering
• EPDM Kerb Edge – Raised perimeter edges
• EPDM Contact Adhesive – For all bonding
• Silicone Sealant – For top edge sealing (use roof-grade silicone)

📋 Technical Properties

💬 Frequently Asked Questions

Q: Do I need to chase this into the wall like traditional lead flashing?
A: Not necessarily. Surface-mounted installation with sealant provides excellent weatherproofing. However, for a more traditional appearance or in exposed locations, you can chase the top edge into a mortar joint.

Q: What sealant should I use?
A: Use a high-quality roof and gutter silicone sealant, compatible with aluminium. Apply generously behind the flashing and along the top edge.

Q: Can this be used on rendered walls?
A: Yes, but ensure the render is in good condition and firmly adhered. On new render, allow full curing time before installation.

Q: How do I handle internal corners?
A: For internal corners, mitre-cut two pieces at 45° and join with sealant. Alternatively, use pre-formed internal corner pieces for a neater finish.

Q: Is this suitable for parapet walls?
A: Yes, use on parapet walls in combination with kerb edge trims for a complete sealed perimeter.

Professional EPDM wall flashing from Rubber Matting Direct – creating watertight abutments for lasting protection.