Fascias and Soffit Installation Guide
This comprehensive guide covers the installation of both replacement and cover UPVC fascia boards and soffits. Whether you're replacing old timber fascias or covering existing boards, this guide provides step-by-step instructions for professional results. See our full colour range
Tools Required
- Hammer
- Measuring tape
- Spirit level
- Saw (circular or mitre)
- Drill with drill bits
- Safety equipment
- Ladder or scaffolding
Materials Needed
- UPVC fascia boards
- Soffit boards
- Edge trim
- Fascia corners
- Galvanized nails
- 152 solvent-free adhesive
- Fixings and brackets
Installation Methods
Full Replacement Installation
Complete removal of old timber fascias and installation of new UPVC fascia boards directly to roof joists.
Cover Board Installation
Installing UPVC fascia boards over existing timber fascias for quick renovation without removal.
Step-by-Step Installation Instructions

This installation method shows a full replacement fascia board fitted directly to the end of the timber joists. This is the preferred method for maximum durability and a professional finish.
Installation Process:
- Remove existing timber fascias completely
- Install new UPVC fascia board directly to the roof joists
- Double nail into each roof joist for secure fixing
- Fit soffits into edge trim as shown in the picture
Key Advantage: This type of fascia installation requires no backing timber, providing a cleaner and more durable finish.

This method features a UPVC cover fascia board installed over the existing timber, providing a cost-effective renovation solution that avoids the need to remove the original boards.
Installation Requirements:
- Double nail at 600mm centres for secure attachment
- Position nails above the centre of the fascia board
- Ensure the guttering system will cover nail heads for a neat finish
- Check that the existing timber is sound before covering
Critical Nail Positioning: Keep nails above the centre of the fascia board so that the guttering system covers them, ensuring a professional appearance.

Box ends are easily covered with a single piece of fascia as demonstrated in this installation method.
Box End Installation Steps:
- Measure box end dimensions carefully
- Cut a single fascia piece to cover the box end
- Install fascia corners on both sides for a neat finish
- Ensure proper alignment with adjacent fascia boards
Professional Finish: Both sides should be finished with fascia corners for the neatest possible appearance.

This comprehensive installation shows both UPVC cover fascia board installation and proper soffit mounting techniques.
Fascia Installation (as per Picture 2):
- UPVC cover fascia board installed over the existing timber
- Double nail at 600mm centres
- Nail positioning above the centre for gutter coverage
Soffit Installation Details:
- Soffit rests on top of the existing wall
- Use 152 solvent-free adhesive to secure the soffit
- Apply adhesive to prevent movement
- Ensure proper ventilation gaps where required
Important: Use 152 solvent-free glue to prevent movement and ensure the long-term stability of the soffit installation.
Installation Best Practices
Key Installation Tips
- Nail Spacing: Always double nail at 600mm centres for cover fascias
- Nail Positioning: Keep nails above the centre line for gutter coverage
- Adhesive Use: Use 152 solvent-free adhesive for soffit stability
- Corner Finishing: Always use fascia corners for a professional appearance
- Joist Fixing: Double nail into each roof joist for replacement fascias
- Edge Trim: Utilise edge trim for soffit installation where appropriate
Professional Results
Following these installation methods will ensure your fascias and soffits provide long-lasting protection and maintain their appearance for years to come. Proper nail spacing, adhesive application, and finishing details are crucial for professional results.
Safety Considerations
Important Safety Notes
- Use appropriate access equipment - ladders or scaffolding
- Wear safety equipment, includinga hard hat and safety glasses
- Check weather conditions before starting work
- Ensure a stable working platform at all times
- Have someone assist when handling long fascia boards
Installation Complete
With these installation methods, you can achieve professional-quality fascia and soffit installation, whether you choose complete replacement or cover board techniques. Remember to maintain proper nail spacing, use suitable adhesives, and finish with high-quality trim pieces for optimal results.