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Metal Flashing
Durable flashing for window heads
Self-Adhesive Tape
Quick waterproof sealing for window heads
Polymer Flashing
Flexible corrosion-resistant flashing for window heads
Z-Flashing
Channels water away from window heads
Step Flashing
Layered flashing fit for window heads
Drip Edge
Prevents water intrusion at window heads

flashing options for window heads: 7 Powerful Methods

Flashing Options for Window Heads

Proper installation of effective window head flashing is essential to safeguard against water ingress, protect your building envelope, and ensure long-term durability.

Why Window Head Flashing Matters

Window head flashing serves as a critical barrier, diverting rainwater away from vulnerable junctions. Integrating airtightness vs breathability balance within your weather-resistive system helps maintain energy efficiency while preventing moisture damage.

Key Flashing Components

  • Drip Cap Flashing: Metal or PVC strip installed above the window head to shed water effectively. It works in tandem with drip beads and water management techniques.
  • Diverter Flashing: Installed within cladding systems to redirect moisture to exterior surfaces.
  • End Dams: Located at each flashing end to prevent water run-off from entering the wall cavity. Enhance protection with patch repair & colour matching.

Top 7 Flashing Options

Choose the right material based on durability, cost, and aesthetic requirements:

  1. Aluminium Head Flashing – Corrosion-resistant and long-lasting; ideal for modern builds. For ease of installation, use an aluminium extension pole.
  2. PVC Plastic Flashing – Lightweight and budget-friendly for low-exposure areas. Finish neatly with a PVC white premium plastic stop bead.
  3. Liquid-Applied Membrane – Seamless coating ideal for complex window shapes. Ensure proper adhesion using Everbuild solvent-based cleaner.
  4. Self-Adhered Flashing Tape – Quick installation around protrusions; try our Blue Dolphin UV-resistant tape.
  5. Sheet Metal Flashing – Custom-fabricated for distinct architectural styles; contact our fabrication team.
  6. Pre-Formed Drip Cap – Standardized profiles for consistent coverage; explore PVC stop bead 6mm.
  7. Combined Diverter & Head Flashing – Integrated moisture management for insulated cladding systems; perfect for insulation rendering installations.

Installation Guide

1. Prepare the Opening

Begin by cleaning the rough opening, ensuring it is level and free of debris to support proper flashing adhesion.

2. Sill and Jamb Flashing

Install sill flashing first, followed by jamb flashing, overlapping each layer by at least 50 mm to ensure continuous protection.

3. Head Flashing Placement

Fit your chosen head flashing option above the window, extending at least 150 mm beyond both jambs to direct water away from the wall assembly.

4. Seal and Integrate

Apply compatible sealants and tie the flashing into your building wrap and external wall insulation systems, maintaining a seamless weather-resistive barrier.

Professional Installation Benefits

With over 15 years of expertise in through-coloured renders and external wall insulation, Simple Solutions 4 U delivers flawless flashing installations that enhance both performance and aesthetics.

  • Premium materials from leading manufacturers
  • Competitive pricing with trade discounts
  • Detail-oriented, customer-focused service

Frequently Asked Questions

Which material is best for window head flashing?

Aluminium head flashing offers the best combination of durability and aesthetics for most UK climate conditions.

Can I retrofit window head flashing?

Yes. Liquid-applied membranes and self-adhered tapes are ideal for retrofits without significant demolition.

Contact Us

For expert advice and high-quality flashing options for window heads, call 07877 329 472 or email info@simplesolution4ushop.co.uk.

Rendered Facade with Window Head Flashing Above Wooden Door
A rendered exterior wall with a wooden door and bamboo blind, illustrating flashing options for window heads such as metal drip edge, integrated stone lintel, and concealed gutter detail to protect against water ingress.
Simple Solution 4 U External Rendering Materials
A close-up of clear plastic sheeting marked with codes, illustrating flashing options for window heads used in external rendering and plastering services by Simple Solution 4 U Ltd.
Outdoor Seating Area with Rendered Wall
A modern outdoor setup featuring two pink chairs and nesting tables against a pastel-rendered wall, illustrating quality plastering and rendering services by Simple Solution 4 U Ltd
Rendered External Wall with Window Head Flashing Options
Photograph of a rendered external wall by Imple Solution 4 U Ltd, featuring arched window openings and detailed flashing options for window heads on a smooth plaster finish.
Decorative Rendered Wall Niche with Street Art
The photograph shows an aged rendered external wall with peeling render and a weathered niche containing modern street art of a woman holding a flower. Visible signs of water damage and cracked render highlight the need for effective flashing options for window heads in external rendering projects.
Construction Gloved Hand with Plastering Tool
A close-up of a gloved construction worker holding a plastering tool, demonstrating window head flashing installation as part of external rendering services by Imple Solution 4 U Ltd
Imple Solution 4 U Ltd External Render
A building exterior rendered by Imple Solution 4 U Ltd featuring window heads with installed flashing and green shutters.
Paint Roller and Ladder for Window Head Flashing
A paint roller positioned on a ladder against an orange rendered wall, representing the tools used by Simple Solution 4 U Ltd for applying flashing options on window heads during external rendering services
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