Domestic Garage Roof Asbestos Removal Project

Project Overview

A homeowner in Newcastle contacted us regarding their domestic garage roof, which they suspected contained asbestos cement sheeting. The garage, constructed in the early 1970s, featured corrugated cement roofing showing typical aging characteristics-surface weathering, minor cracking, and moss growth. The client planned garage conversion to habitable space and required complete roof replacement to meet building regulations thermal performance standards.

Initial visual assessment confirmed high probability of asbestos content based on material age, appearance, and construction style typical of that period. We recommended and arranged laboratory sampling before providing formal quotation, ensuring accurate scope understanding and regulatory compliance planning.

Laboratory results confirmed chrysotile asbestos at approximately 15% by weight in the cement sheeting-typical composition for corrugated AC sheets manufactured through the 1970s-1980s. This confirmation allowed us to develop a comprehensive removal plan with accurate cost estimation and timeline projections.

Project Challenges and Planning

Several site-specific factors influenced our approach. The garage adjoined the main dwelling with a shared party wall, requiring careful debris control to prevent contamination transfer. Neighbouring properties on both sides sat within 3 metres, necessitating enhanced containment measures and neighbour notification under duty-of-care requirements.

Access presented moderate complexity-the garage fronted onto a residential street with no off-road parking, requiring coordination with local authority for temporary parking suspension during skip placement. The roof pitch (approximately 15 degrees) allowed safe working access using roof ladders and crawl boards, avoiding expensive tower scaffolding requirements that would have significantly increased project costs.

Weather timing proved critical. We scheduled work during a settled weather period (confirmed via 5-day forecast) avoiding rain, which would complicate asbestos handling, and high winds exceeding safe working limits for sheet material handling at height. This planning ensured both worker safety and contamination control effectiveness.

Removal Methodology and Safety Controls

We implemented non-licensed asbestos removal procedures appropriate for intact asbestos cement roof removal under Control of Asbestos Regulations 2012. Despite being "non-licensed," the work required comprehensive risk assessment, detailed method statements, and strict operational controls-the classification simply means HSE notification wasn't required for this scale of domestic work.

Pre-removal preparations included establishing a 3-metre exclusion zone around the garage perimeter using barrier tape and warning signage. We positioned the waste skip immediately adjacent to the garage (following parking suspension authorization) minimizing carrying distance for removed sheets. Ground-level working areas received heavy-duty polyethylene sheeting creating a clean staging area for lowering roof sheets.

Operatives accessed the roof using properly secured roof ladders with standoff brackets preventing gutter damage and providing stable platforms. All personnel wore FFP3 respiratory protection, full disposable coveralls, and safety harnesses when working on roof slopes. This multi-hazard protection addressed both asbestos exposure and conventional height-work risks.

Sheet removal proceeded systematically from ridge downward, allowing each sheet to overlap the one below during removal, maintaining weather protection for the garage interior until the final stage. We carefully removed fixings (galvanized hook bolts) using hand tools, avoiding power tool use that would create unnecessary dust. Each sheet received thorough water spray treatment before lifting to suppress any loose surface fibers from weathering degradation.

Sheets were carefully lowered to ground level using rope-work techniques preventing drops or impacts that would cause shattering. Despite careful handling, some sheets showed age-related brittleness resulting in minor edge fractures during removal-all broken fragments underwent immediate wetting and collection into asbestos waste sacks. Intact sheets went directly into the skip in horizontal layers with minimal stacking height to prevent movement-related breakage during transport.

Waste Management and Site Clearance

The project generated approximately 35 square metres of corrugated asbestos cement roofing, translating to roughly 520kg of waste (AC sheeting averages 14-16kg per square metre). Additional waste included contaminated fixings, ridge pieces, and barge boards showing asbestos debris accumulation requiring disposal as asbestos waste. All materials were transported under full consignment note documentation to a licensed asbestos disposal facility in County Durham.

Following sheet removal, we conducted thorough site decontamination. The exposed roof timbers underwent HEPA vacuuming to remove residual dust and fiber deposits from decades of weathering. Interior surfaces received damp wiping to capture any fallen debris. The external ground-level work area was similarly cleaned, with all polyethylene sheeting and disposable equipment packaged as asbestos waste.

Visual inspection confirmed clean site conditions before demobilization. We provided the client with waste disposal certificates, photographic completion documentation, and guidance on maintaining clear site conditions until the replacement roof installation commenced (scheduled with their chosen roofing contractor for the following week).

Project Timeline and Outcomes

Total project duration from initial contact to completion documentation:

• Week 1: Initial site visit, sampling, laboratory testing
• Week 2: Results received, quotation provided and accepted, parking suspension arranged
• Week 3: Removal work completed (1.5 days on-site), waste disposal, site clearance
• Week 4: Completion documentation provided, client's roofing contractor commenced replacement installation

The client successfully proceeded with their garage conversion project without asbestos-related delays or complications. Total project cost came to -1,350 including sampling, removal, waste disposal, and all documentation-representing typical pricing for domestic garage roof asbestos removal projects of this scale and complexity.

This case study demonstrates our systematic approach to seemingly straightforward domestic asbestos projects. Proper planning, regulatory compliance, and professional execution ensure safe outcomes protecting both immediate occupants and the broader community from asbestos exposure risks.