RICS Level 3 Building Survey in SY17 5

The SY17 5 postcode encompasses a diverse range of properties, from 16th-century timber-framed farmhouses in Trefeglwys to Victorian stone cottages in Carno and modern developments around Caersws. This variety in construction age and style means that each property presents unique structural considerations that a standard inspection simply cannot address adequately. Properties like Berthlas in Trefeglwys, a 16th-century timber-framed farmhouse, or Belle Vue with its characteristic lobby-entry plan, represent construction techniques that differ fundamentally from modern building methods.

Many properties in this area were built using traditional construction methods that differ significantly from modern building practices. Timber-framed construction, solid stone walls, and lime-based mortars require specialist knowledge to assess correctly. Our surveyors understand these traditional building techniques and can identify issues that might be missed by less experienced inspectors. We examine the condition of hidden timber framing, assess the integrity of solid walls, and evaluate the state of historic lime mortar pointing that is essential to the breathability of older structures.

The geological conditions in SY17 5 also warrant careful investigation. The underlying clay-rich soils in parts of this area can cause subsidence through shrink-swell movement, particularly during periods of drought followed by wet weather. Properties with large trees nearby are especially vulnerable, as tree roots draw moisture from the soil, exacerbating ground movement. The presence of mudstones and shales in the local geology, as identified in the wider Church Stretton district records, indicates potential shrink-swell clay risk that our surveyors specifically look for when inspecting properties in this area.

The historical mining activity around Trefeglwys presents another important consideration for buyers in this area. The Van Lead Mines, which operated until the early 1920s, left underground voids that can cause subsidence even today. Properties in areas with historical mining activity may require additional investigations such as a mining report or geotechnical survey to fully assess ground stability. Our surveyors are trained to identify the visual signs of mining subsidence, including characteristic crack patterns and irregular ground movement.

• Timber-framed historic properties
• Stone-walled cottages
• Properties near trees
• Homes in flood risk zones
• Listed buildings
• Properties with mining history

Properties in SY17 5 face several area-specific environmental risks that our surveyors are trained to identify. The River Severn flows through Llandinam, and the village experienced significant flooding during Storm Franklin in 2022. Properties in low-lying areas near the river and its tributaries face ongoing flood risk, which can cause severe structural damage and create damp issues that compromise building integrity. The Llandinam Gravels Nature Reserve, described as floodplain meadows, demonstrates the extent of flood-prone land in this area. When surveying properties near watercourses, we pay particular attention to flood resilience measures and any signs of previous water damage.

The historical mining activity around Trefeglwys presents another important consideration. The Van Lead Mines, which operated until the early 1920s, left underground voids that can cause subsidence even today. Properties in areas with historical mining activity may require additional investigations such as a mining report or geotechnical survey to fully assess ground stability. We recommend obtaining a separate coal mining report for properties in areas with historical mining activity, which includes Trefeglwys. This report uses geological data to identify potential mine workings beneath the property and assess the risk of ground collapse.

The underlying geology of SY17 5 includes mudstones and shales that can shrink and swell with moisture changes. This shrink-swell clay risk can cause foundations to move, leading to structural cracks and movement in walls. Properties with trees planted close to the building are particularly vulnerable, as mature trees can extract significant amounts of moisture from the soil, accelerating ground shrinkage during dry periods. Our surveyors assess the proximity of trees to properties and evaluate whether the foundations may be affected by soil movement, particularly during prolonged dry spells or following changes in vegetation near the property.

Based on our experience surveying properties throughout Caersws, Llandinam, Trefeglwys, Carno and the surrounding areas, several recurring issues frequently appear in our reports. Dampness is perhaps the most common problem, particularly in older properties with solid walls that lack modern damp-proof courses. The rural nature of SY17 5 means many properties have been subject to years of exposure to the elements, and moisture can penetrate through deteriorated pointing, damaged render, or missing roof tiles. Properties with solid stone walls are particularly susceptible to rising damp and penetrative moisture, especially where external ground levels have been raised over time or where gutters and downpipes are in poor condition.

Structural movement manifests as cracks in walls, particularly around door and window openings, and doors that no longer close properly. While some movement is normal in older properties as they settle over time, our surveyors can distinguish between harmless age-related movement and more serious issues requiring structural engineering input. We pay particular attention to any cracks that appear to be widening or show signs of recent activity, especially those that correspond to the pattern of mining subsidence or clay shrink-swell movement that affects this area. Properties in Trefeglwys, near the former lead mines, require especially careful assessment for signs of ground instability.

Roof problems are frequently identified in our SY17 5 surveys. Slate roofs, common throughout this area, can develop slipped tiles, damaged ridges, and deteriorating lead flashings. The traditional lime mortar used in older roofs often fails before the slates themselves, allowing water ingress that damages timbers and creates internal leaks. Our inspectors carefully assess roof spaces where accessible, looking for signs of past water damage, rot, and insect infestation in roof timbers. We also check the condition of chimneys, which on older properties are often constructed of solid masonry and can suffer from weathering, cracked flues, and deteriorating pointing.

Timber decay is another significant concern in properties throughout SY17 5. The combination of age, traditional construction methods, and the wet Welsh climate creates ideal conditions for both wet rot and dry rot in structural timbers. We inspect floor joists, roof timbers, and window frames for signs of decay, particularly in areas where ventilation is poor or where there has been past water ingress. Our surveyors use probes where appropriate to assess the extent of any timber decay and recommend specialist repairs where necessary. In properties that have been poorly maintained or where modernization has reduced natural ventilation, timber decay can be extensive despite appearing superficially sound.