Lead Flat Roofs Replaced With Torch On Felt

The Problem Identified

Persistent Leaks From Ageing Lead Flat Roofs

The property featured multiple flat roof sections originally covered in lead. While lead can be long-lasting when installed and detailed correctly, these roofs had reached the point where age, movement, and thermal fatigue had compromised their performance.

The homeowner reported:

• Water ingress during prolonged or heavy rain

• Damp staining appearing on internal ceilings

• Previous repair attempts that failed to provide a long-term solution

Inspection showed splitting and fatigue in the lead sheets, along with failed joints and detailing that allowed water to track beneath the covering.

Our Inspection and Findings

Roof-Level Assessment

A full inspection was carried out to assess:

• The condition of the lead sheets

• The integrity of joints and upstands

• The condition of the roof deck beneath

It was clear that the lead had deteriorated beyond economical repair. Continued patching would only delay further leaks and increase long-term costs.

Underlying Issues Discovered

Once sections were exposed, we identified:

• Areas of moisture damage beneath the lead

• Inadequate detailing that allowed water to pool

• General age-related fatigue in the roofing system

This confirmed that a full replacement, rather than further repairs, was the most effective solution.

The Solution Provided

Removal of Existing Lead Roofing

The first stage involved carefully removing the existing lead flat roof coverings. This allowed full access to the roof deck and ensured no hidden issues were left untreated.

All materials were removed safely and responsibly, preparing the roof for reconstruction.

Preparation of the Roof Structure

Before installing the new system, we:

• Inspected the roof deck for damage

• Repaired or replaced any compromised sections

• Ensured correct falls for water run-off

Proper preparation is essential to the longevity and performance of a flat roof.

Installation of Torch-On Felt System

A high-performance torch-on felt flat roofing system was installed, providing:

• Multiple waterproof layers

• Strong resistance to standing water

• Excellent durability in UK weather conditions

All edges, upstands, and joints were fully sealed to create a continuous, watertight finish.

Why Torch-On Felt Was the Right Choice

Practical and Long-Lasting Performance

For this property, torch-on felt was a more suitable solution than replacing the lead. Benefits included:

• Proven reliability for flat roofs

• Strong resistance to thermal movement

• Cost-effective long-term protection

• Clean, neat finish suitable for residential properties

The chosen system was designed to accommodate Cheltenham’s rainfall patterns and seasonal temperature changes.

The Result

Fully Watertight Flat Roofs With No Further Leaks

Following completion:

• All leaks were fully resolved

• Internal damp issues ceased

• The flat roof areas were fully weatherproof

• The homeowner gained confidence in the roof’s long-term reliability

Even after periods of heavy rain, the new system performed exactly as intended.

The Homeowner Benefit

By replacing the failing lead flat roofs rather than continuing with temporary fixes, the homeowner benefited from:

• Long-term protection against water ingress

• Reduced risk of future internal damage

• Improved reliability compared to repeated repairs

• Peace of mind during extreme weather

The new roofing system also reduced ongoing maintenance concerns.

Why Flat Roof Leaks Should Never Be Ignored

Flat roof leaks rarely improve on their own. In most cases, they worsen gradually, allowing moisture to:

• Damage roof decks

• Affect internal ceilings and insulation

• Increase repair costs over time

This project demonstrates why decisive action is often more cost-effective than repeated short-term repairs.

Local Cheltenham Context

Across Cheltenham, many properties still have older flat roofs constructed using traditional materials. While these systems may have performed well historically, age and changing weather patterns mean replacement is often the most sensible option.

Modern flat roofing systems, when installed correctly, provide reliable protection while maintaining a tidy appearance and strong kerb appeal.

Final Outcome

This project delivered fully watertight, professionally finished flat roofs that eliminated ongoing leaks and protected the property long-term.

It highlights the importance of choosing the right roofing system for the job and addressing flat roof failures properly rather than relying on repeated patch repairs.