Replace fascia & soffit.

Replacing tired, peeling, or rotting timber rooflines with modern uPVC or high-quality wood not only safeguards your property’s structural integrity but also significantly boosts its kerb appeal. In the UK, maintaining a watertight roofline is essential for preventing damp issues that can cost thousands to rectify if left unchecked.

What Does the Work Involve?

• Site Access: Setting up safe access, usually via Easi-dec systems, tower scaffolding, or full scaffolding for high-reach areas.
• Removal: Carefully stripping away old guttering, downpipes, and existing fascia and soffit boards.
• Rafter Inspection: Checking the exposed rafter tails for signs of "wet rot" and repairing any structural timber before the new boards are fitted.
• Eaves Protection: Installing eaves protectors (felt trays) to prevent water from pooling behind the fascia and rotting the roof felt.
• Installation: Fixing new soffit boards (including ventilation strips) and heavy-duty fascia boards directly to the rafters.
• Guttering: Fitting new gutter brackets, lengths, and downpipes with the correct "fall" to ensure efficient water drainage.
• Finishing: Sealing all joints with colour-matched silicone and installing bird combs to prevent nesting under tiles.

Typical Costs

Prices for roofline replacement vary based on the size of your property, the materials chosen (uPVC is standard, while aluminium or hardwood is premium), and the complexity of the scaffolding required. The figures below include VAT and reflect 2025/26 UK market averages.

Factors such as removing asbestos soffits, repairing rotten rafter tails, or choosing "deep-flow" guttering for large roofs will increase the final quote. Always ensure your quote specifies "full replacement" rather than just "capping" over old wood.

How Long Does It Take?

• Small Repairs: 2–4 hours for minor guttering leaks or single board replacements.
• Terraced House (Front & Back): 1–2 days depending on access.
• Semi-Detached House: 2–3 days for a full wrap-around replacement.
• Large Detached House: 4–6 days, especially if there are multiple gables or conservatories to work around.

DIY or Professional?

While a confident DIYer can replace a single section of guttering, a full roofline replacement is almost always a professional job. Working at height is inherently dangerous and requires specialist access equipment that meets UK Health and Safety standards.

Professional Tip: Improperly installed fascias can lead to "damp bridge" issues or roof felt failure. A professional installer will ensure the correct "fall" for your gutters and adequate ventilation for your roof void.

Furthermore, professionals will be familiar with Part F of the Building Regulations regarding roof ventilation, ensuring your attic doesn't suffer from condensation and mould growth after the new boards are fitted.

Choosing the Right Tradesperson

• Check Credentials: Look for installers registered with schemes like FENSA (for roofline), HARE, or those who carry a "Competent Person" status.
• Avoid "Capping" Specialists: Be wary of tradespeople who insist on nailing new uPVC over old wood; this traps moisture and accelerates rot.
• Ask for Samples: Request to see the thickness of the fascia board. "Full replacement" boards should be 16mm–25mm thick, whereas capping boards are much thinner (9mm).
• Questions to Ask:
  • Will you be replacing the eaves felt/trays as part of the job?
  • How do you plan to access the roofline (scaffolding vs. ladders)?
  • Is the waste disposal (old timber and plastic) included in the price?
  • Do you offer an Insurance Backed Guarantee (IBG)?

UK Regulations

• Building Regulations Part F: Mandatory requirement for adequate ventilation in the roof void to prevent condensation.
• Working at Height Regulations (2005): Trades must use appropriate equipment (scaffolding/towers) to ensure safety.
• Asbestos Awareness: Many soffits installed before 2000 contain asbestos. If suspected, a specialist survey and removal are required by law.
• Paperwork: You should receive a written contract, a guarantee (typically 10–20 years for uPVC), and a receipt for waste disposal.

Common Problems

• "Capping" Over Rot: The most common shortcut. Hiding rotten wood behind plastic leads to structural rafter failure within years.
• Inadequate Ventilation: Using non-vented soffits can cause "sweating" in the loft, leading to mouldy insulation and timber decay.
• Incorrect Gutter Fall: If gutters are installed level rather than with a slight slope, water will pool, causing sagging and overflows.
• Poor Sealant Use: Using cheap silicone instead of low-modulus neutral cure sealant leads to leaks as the plastic expands and contracts in the sun.

Frequently Asked Questions