RICS Level 3 Survey in St. Mewan

Properties in St. Mewan and the surrounding St Austell area present specific challenges that only a comprehensive RICS Level 3 Survey can properly assess. The local geology, dominated by Devonian slates and grits with areas of granite intrusion and kaolinitic clay deposits, creates potential for shrink-swell movement in the ground beneath properties. This ground instability can lead to structural movement over time, particularly in older buildings with shallow foundations. Our inspectors are trained to identify the signs of such movement and assess whether past or present ground conditions are causing concern.

The housing stock in St. Mewan reflects Cornwall's rich architectural heritage, with a significant proportion of properties dating from the pre-1919 period. These older buildings often feature solid wall construction using local stone, cob, or early brick techniques that differ significantly from modern cavity wall builds. While these traditional structures have stood for generations, they require expert understanding to properly assess their current condition. Our Level 3 survey provides exactly that thoroughness, examining roof structures, load-bearing walls, floors, and the building envelope in detail.

Beyond structural concerns, the local climate in Cornwall means that dampness is a recurring issue in properties throughout the St. Mewan area. Penetrating damp, rising damp, and condensation are all common in older buildings, particularly those with solid walls that lack the cavity space found in modern construction. Timber elements in these properties can also be affected by woodworm or rot where damp conditions exist. Our inspectors systematically check for all these issues, testing walls with moisture meters and examining timber in accessible areas for signs of infestation or decay.

The broader St Austell economy, historically tied to china clay extraction, has influenced local development patterns. Many properties in the area were constructed to serve workers in this industry, while others represent the agricultural heritage of the parish. This mix of housing types, from workers' cottages to farmhouses and modern family homes, means each property requires individual assessment rather than generic assumptions about construction quality.

Our experience surveying properties throughout St. Mewan means we know exactly what to look for when inspecting homes in this area. The combination of older building stock, local clay soils, and Cornwall's wet climate creates a predictable pattern of defects that our surveyors are experts at identifying. From slate roof deterioration common on period properties to render failures on solid walled buildings, we document every issue with photographic evidence and clear explanations.

Structural movement is another key concern in this area. While St. Mewan is not directly on the coast or a major river, surface water flooding can occur in low-lying areas during heavy rainfall, potentially affecting properties and leading to damp-related problems. More significantly, the presence of clay deposits in the local geology means that shrink-swell movement can cause foundations to shift over annual weather cycles. Our inspectors examine walls for cracking patterns that indicate this type of movement and assess whether remedial work may be required.

Properties in St. Mewan often feature traditional Cornish slate roofs, which while durable, eventually require attention as the slates age and mortar deteriorates. We inspect hip roofs, gable ends, valleys, and flashing details, noting any slipped slates, broken ridges, or signs of previous repairs. Chimney stacks, particularly on older properties, frequently show signs of decay in the pointing, damaged flashings, or deteriorating brickwork that our surveyors document thoroughly.

Render and external wall finishes on solid-walled properties can suffer from cracking, bulging, or complete failure, especially where water has penetrated and caused frost damage. We assess the condition of all render types, whether traditional lime-based or more modern cement render, and note any areas where repair or replacement may be necessary to prevent further deterioration.

When you commission a RICS Level 3 Survey from our team, you receive a document that follows the standardized RICS format, ensuring consistency and clarity regardless of which surveyor conducts the inspection. The report begins with an executive summary that highlights the key findings and any urgent issues that require immediate attention. This is followed by a detailed breakdown of each building element, from the roof down to the foundations, with specific observations about condition and any defects present.

Each section of the report uses the RICS condition rating system, ranging from Rating 1 (no repairs required) through to Rating 3 (urgent repairs needed). This system makes it easy to prioritize any remedial work that may be identified. Beyond simply listing problems, our report includes practical recommendations for addressing each issue, from simple maintenance tasks that can be carried out immediately to more significant repair works that may require specialist contractors. We also provide cost guidance where possible, helping you understand the potential financial implications of any defects discovered.

For properties in St. Mewan where we identify potential ground stability concerns, our report may recommend further specialist investigation. This is particularly relevant for properties built on or near areas with clay deposits, or where we observe cracking patterns suggestive of foundation movement. While our Level 3 Survey provides a comprehensive visual assessment, some issues may require a geotechnical engineer or structural engineer to conduct more detailed analysis. Our report will make this clear if we consider such additional investigation necessary.

Properties in St. Mewan showcase the variety of construction methods used throughout Cornwall's history. Traditional solid wall construction is prevalent in properties built before the 1930s, with many using local stone, granite, or cob walls that can be several hundred millimetres thick. These walls were typically constructed without cavities, meaning they rely on their mass and any existing render or paint finish to provide weather resistance. Understanding how these walls function is essential for proper assessment, as modern retrofitting measures may have altered their original characteristics.

Post-war development in the area brought cavity wall construction, using brick or blockwork with a gap between the inner and outer leaves. This construction method provides better thermal performance and weather resistance but can still suffer from issues such as cavity bridging, missing insulation, or damp penetration where the external leaf is damaged. Our surveyors understand both construction types and know how to identify common defects associated with each.

Roofing in St. Mewan predominantly uses natural slate, a durable material that has been used for centuries in Cornwall. However, as slate ages, the fixing nails can corrode and slates may become brittle or slip. We carefully inspect roof slopes, valleys, and flashings, using ladder access where safe to do so. Flat roofs, where present, receive particular attention as they are more prone to water ingress than pitched roofs.