RICS Level 3 Survey in Heydour

Heydour’s housing stock still shows its rural and agricultural roots. Detached farmhouses, stone cottages and period manor houses set the tone, with many carefully kept over generations and others showing the marks of age. Because so much of the stock was built before 1919, we often see homes without modern damp-proof courses, with traditional lime mortar pointing rather than cement, and with suspended timber floors instead of solid concrete bases. Those are historically correct methods, but they need specialist knowledge to read properly.

Lincolnshire Limestone, called freestone locally, has been quarried here since the 14th century and remains central to the area’s architecture. That warm golden-brown stone turns up in churches, manor houses and modest cottages, and it gives Heydour its particular look. It is a soft stone, though, so weathering, salt erosion from driving rain and biological growth can all take a toll. Our inspectors watch the stonework closely for erosion, cracking or movement that might point to a deeper issue.

Geology matters here more than many buyers expect. Heydour sits on the Kesteven Plateau, where Jurassic limestone is overlain by calcareous boulder clay, a glacial deposit with a high clay content. In long dry spells that clay can shrink, foundations can move, and cracks may follow. Our surveyors look carefully at foundations, check for evidence of previous movement and consider whether the structure is suited to the ground conditions, especially where older homes have been extended or altered over the years.

There is another local quirk to bear in mind, the presence of solution features, sometimes known as swallow holes, in the limestone below. Over thousands of years water can dissolve voids into the rock, and in some spots those voids influence foundation conditions. Our surveyors know to look for this risk and will investigate anything that suggests ground instability linked to these features.

• Pre-1919 period properties
• Listed building considerations
• Lincolnshire Limestone construction
• Boulder clay soil foundations
• Solution features in limestone geology

Damp and condensation are among the problems we most often find in Heydour’s older stone houses. Traditional buildings relied on natural ventilation, with moisture escaping through gaps around windows, doors and mortar joints. Once modern changes such as double glazing, solid doors or internal cladding are added, that airflow can drop sharply, moisture gets trapped inside and condensation follows. Our inspectors check ventilation carefully and look for damp staining, mould growth or timber deterioration. Lincolnshire Limestone is soft and can hold a lot of moisture, especially on north-facing walls that get less sun.

Roof defects are another regular finding in the area. Traditional roofs with timber rafters and clay or slate tiles can suffer in several ways. Tiles slip, or become porous with age, and water then gets in and damages battens and rafters. Mortar in chimneys can crack and crumble, which leads to leaks around the stack. Ridge tile pointing often fails first, letting water into the roof structure. Where we can, our surveyors inspect roof spaces and assess the tiles, flashings and timber from inside and outside the property. Many Heydour homes still have traditional peg tiles, which need careful checking as they age.

Cracks in walls, especially around door and window openings where stress builds up, are a common sign of structural movement. In Heydour, that movement is often tied to the clay soils below the area, which expand and contract as moisture levels change. Our inspectors separate historic cracks that have stayed stable for years from newer movement that may still be active. We look at the width, pattern and position of cracks to work out the likely cause and to decide whether a structural engineer should take a closer look. The calcareous boulder clay across the Kesteven Plateau is especially prone to shrink-swell behaviour during long dry spells.

We also come across timber decay in suspended floors and roof structures. Age, possible moisture ingress and the original building methods used in these period homes mean rot can develop out of sight. Where it is possible, our surveyors probe timber elements and look for fungal growth or insect activity that could weaken the structure.

• Damp and condensation in converted properties
• Roof tile slippage and mortar failure
• Structural cracking from clay soil movement
• Timber rot in suspended floors and roof structures