Asbestos Cladding Projects

Dabinett is currently managing two significant commercial roof replacement projects, one located in Mid-Wales and the other in North London. Both sites involve the removal and replacement of asbestos cement roofing, upgrading to modern, insulated metal roof cladding systems.

Understanding the Risks of Asbestos Cement Roofing

While asbestos cement roofs in good condition pose minimal risk to building occupants, deterioration over time can lead to serious issues such as water ingress, cracked fixings, and UV-damaged roof lights. Moss growth is often a visible sign that the roof surface is retaining moisture—an indicator that the roof is approaching the end of its service life.

It’s important to note that in asbestos cement roofing, asbestos was used to reinforce the cement, not for fire protection. As the material ages, the surface can break down, increasing the risk of fibre release and structural fragility.

Asbestos Roof Management Options

There are four main approaches to managing asbestos roofing:

1. Do Nothing
   Allowing the roof to deteriorate without intervention risks breaching asbestos regulations, due to the lack of a safe management plan.
2. Clean and Apply Liquid Coating
   This method binds asbestos fibres and reinforces the roof surface. While manufacturers may offer guarantees, the underlying asbestos remains fragile and unsuitable for safe roof access.
3. Overcladding
   A structural framework is installed over the existing asbestos roof, topped with new metal cladding. This solution minimises weather-related delays and allows safe roof access, although the asbestos remains encapsulated within the building.
4. Full Roof Replacement
   The most comprehensive solution involves removing the asbestos cement sheets and installing new profiled metal cladding with insulation. While this exposes the building temporarily, it ensures complete asbestos removal from the site.

Bonus: Full asbestos roof replacement may qualify as land remediation, potentially offering tax relief under HMRC guidelines (click here for HMRC guidance)

Project Highlights

Both projects involve the replacement of deteriorated asbestos cement roof cladding with modern insulated metal roofing systems. Each site uses different cladding manufacturers to suit client needs:

• Mid-Wales Site: Approximately 1,000 sqm of roof renewal using Tata Steel cladding.
• North London Site: Circa 2,000sqm. Utilising Kingspan cladding.

Independent Roofing Advice & Tender Management

Dabinett conducted detailed roof surveys and prepared feasibility reports outlining all viable options. Clients were then provided with comprehensive tender packs, including:

• Schedules of work
• Technical specifications
• Architectural drawings
• Health and safety documentation

The tendering process revealed a wide range of pricing, with a cluster of competitive bids at the lower end—highlighting the value of independent professional advice in achieving cost-effective outcomes.