RICS Level 3 Building Survey in PA41 7

Properties on the Isle of Gigha present unique assessment considerations that our inspectors understand intimately. The island's housing stock predominantly consists of traditional stone-built properties, many dating back over a century, with slate roofing that has weathered decades of Atlantic storms. These older properties, while full of character, often conceal defects that only an experienced eye will spot, from hidden timber decay in roof spaces to structural movement that may have occurred gradually over decades. Our surveyors know exactly where to look for these hidden problems and understand how traditional island construction methods affect building performance.

The coastal environment creates specific challenges for Gigha properties. Driving rain from the west, salt-laden air, and exposure to high winds all take their toll on building fabric. Our Level 3 Survey specifically addresses these island-specific issues, examining external walls for signs of damp penetration and salt attack, inspecting roof coverings for wind damage and wear, and assessing timber elements for both wet and dry rot that thrives in the damp island climate. We check pointing and mortar condition in stone walls, as the combination of age and exposure often leads to deteriorating mortar joints that allow water ingress.

The geology beneath Gigha, primarily consisting of metamorphic schist and gneiss, generally presents low risk for clay-related subsidence, but localised ground conditions can still cause issues that our surveyors know to check for. Areas with poor drainage or made-up ground may experience differential settlement, and we examine properties for signs of this type of movement. While mining subsidence is not a concern on Gigha (there is no history of mineral extraction), we still assess for any signs of ground instability that might affect the property.

A Level 3 Survey is essential for any property built before 1900, listed buildings which require specific knowledge of historic construction methods, or properties showing visible signs of structural movement. Even newer properties on the island benefit from the detailed assessment, as the exposed location means weather-related defects can appear quickly. Our report provides priority-coded recommendations, clearly indicating which issues require urgent attention and which can be monitored over time, helping you plan and budget for future maintenance.

• Complete structural assessment of all accessible elements
• Detailed analysis of defects with causes and origins
• Priority-rated recommendations for remedial work
• Guidance on future maintenance and emergency repairs
• Specialist advice on traditional island construction methods

The coastal and exposed nature of the Isle of Gigha creates specific defect patterns that our surveyors are trained to identify. Damp penetration represents one of the most common issues, driven by the persistent westerly winds and rainfall that characterise the Argyll coast. Water can work its way through traditional stone walls and mortar joints, causing internal damp patches and deterioration of internal finishes. Our inspectors examine walls thoroughly, using their experience to identify both obvious signs of damp and more subtle indicators that problems may be developing behind surfaces. We check for staining, peeling wallpaper, musty odours, and physical dampness using appropriate detection methods.

Salt attack and erosion affect external masonry throughout the island. The salt carried on Atlantic winds accelerates the weathering of stone and mortar, particularly on west-facing elevations that bear the brunt of winter storms. This erosion can weaken wall structures over time, and our Level 3 Survey examines the extent of this damage, assessing whether remedial work is needed to preserve the building's integrity. We inspect pointing condition, stone surface weathering, and any signs of structural distress that might be related to material degradation. Lime mortar pointing, common on traditional properties, often requires re-pointing more frequently than modern cementitious mortars.

Timber elements throughout properties, from window frames to structural beams, are vulnerable to both wet rot and dry rot in Gigha's damp climate, and we pay particular attention to these critical components. Wet rot requires ongoing moisture to develop and often affects timber in contact with damp walls or poorly ventilated areas. Dry rot, while less common, can be more serious as it spreads through timber even when moisture levels have reduced. Our inspection includes probing timber elements where accessible to assess their structural integrity and identifying any fungal growth that might indicate rot problems.

Roofing defects are frequently identified during our surveys. Slate roofs, while durable, suffer from freeze-thaw damage during winter months, with individual slates cracking or becoming displaced. Wind damage is a particular concern on the exposed island, where strong Atlantic gales can lift or remove roofing materials entirely. We inspect accessible roof spaces where we can assess the condition of rafters, sarking, and any insulation. Flat roof sections, where present, often show deterioration more quickly than pitched roofs in this climate. Given the age of much of Gigha's housing stock, we also check for structural movement that may have occurred over the years, assessing whether this represents ongoing movement requiring urgent attention or historical settlement that has stabilised.

• Damp penetration through walls and foundations
• Salt erosion of external stonework
• Timber decay in windows and structural elements
• Roof damage from wind and weather
• Structural movement in older properties
• Drainage and surface water issues