Overview of the Ketton House

The Ketton House, a distinctive property type from the 1920s, stands as a testament to early 20th-century British construction ingenuity. Manufactured by the Ketton Cement Co., these properties are primarily detached bungalows, characterized by their medium pitch hipped or gable roofs, rendered external walls, and unique construction materials. This article delves into the intricate details of Ketton Houses, providing home buyers and investors with essential insights into their construction, typical characteristics, potential hazards, and inspection tips.

Historical Context and Manufacturing

Manufacturer and Designer

The Ketton House was both manufactured and designed by the Ketton Cement Co., a prominent name in the construction industry during the early 20th century. Known for their innovative use of Precast Reinforced Concrete (PRC), Ketton Cement Co. aimed to provide durable and cost-effective housing solutions in the post-World War I era.

Period Built

These properties were predominantly built in the 1920s, a period marked by a significant demand for affordable housing. The use of PRC was a revolutionary approach at the time, allowing for quicker construction and reduced costs.

Typical Locations

Ketton Houses are commonly found in suburban areas across the UK, particularly in regions where there was a high demand for rapid housing development during the interwar period. These areas often include parts of the Midlands and the South East of England.

Identification Characteristics

Architectural Features

Ketton Houses are easily identifiable by their architectural features:
– Detached Bungalows: These properties are typically single-storey, detached bungalows.
– Roof: They feature medium pitch hipped or gable roofs covered with tiles.
– External Walls: The external walls are either fully rendered or exhibit exposed storey-height PRC columns and PRC eaves beams with rendered PC infill panels.
– Plinths and Sills: RC plinths and PRC window sills are common features.

Variants

Some variants of Ketton Houses may have external walls with painted PRC columns and PRC beams, adding a slight variation to the standard design.

Construction Details

Substructure

The substructure of Ketton Houses typically includes a brick underbuilding, an RC plinth, and a concrete slab. This robust foundation was designed to provide stability and durability.

Frame

The main frame consists of storey-height 6″ PRC columns and PRC beams. These components are crucial for the structural integrity of the property.

External Walls

The external walls are constructed using rendered 2 1/2″ PC panels, with a cavity and mesh-reinforced PRC panels. This combination provides both insulation and strength.

Ground Floor

The ground floor usually features timber boarding on timber joists, with concrete flooring in the kitchen area. This mix of materials was chosen for its practicality and cost-effectiveness.

Roof

The roof structure comprises timber rafters and purlins, covered with tiles. This traditional roofing method ensures durability and weather resistance.

Typical Defects and Hazards

Cracking of PRC Columns and RC Plinths

One of the most common issues with Ketton Houses is the cracking of PRC columns and RC plinths. This can be attributed to the natural aging of materials and potential structural stress.

Concrete Degradation

Over time, the concrete used in the construction of Ketton Houses can degrade, leading to reduced structural integrity. This is particularly prevalent in properties that have not been well-maintained.

Moisture Ingress

Due to the construction methods and materials used, Ketton Houses can be susceptible to moisture ingress. This can lead to damp issues, which, if left untreated, can cause significant damage to the property.

Asbestos

Given the period in which these houses were built, there is a possibility that asbestos-containing materials were used. Asbestos poses serious health risks if disturbed, so it is crucial to have a thorough survey conducted to identify and manage any asbestos presence.

Legal Considerations

Defective Premises Act

Ketton Houses are not typically classified as defective under the Defective Premises Act. However, due to their age and the materials used, they may require significant maintenance and repairs to ensure they meet modern safety standards.

Inspection Tips for Surveyors

External Inspection

• Check for Cracks: Inspect the PRC columns and RC plinths for any signs of cracking. This can indicate structural issues that need addressing.
• Assess Render Condition: Examine the condition of the rendered external walls. Look for any signs of deterioration or damage.
• Roof Inspection: Ensure the roof tiles are intact and check for any signs of water ingress or damage to the timber rafters and purlins.

Internal Inspection

• Flooring: Inspect the timber boarding and joists for any signs of rot or damage. Pay particular attention to the concrete flooring in the kitchen area.
• Moisture Levels: Use a moisture meter to check for damp issues within the property. Look for any signs of mould or mildew.
• Asbestos Check: Conduct a thorough survey to identify any asbestos-containing materials. Ensure proper management and removal if necessary.

Structural Integrity

• PRC Columns and Beams: Assess the condition of the PRC columns and beams. Look for any signs of degradation or structural weakness.
• Concrete Slab: Check the condition of the concrete slab for any signs of cracking or movement.

Maintenance and Repair Considerations

Regular Inspections

Regular inspections are crucial for maintaining the structural integrity of Ketton Houses. Schedule annual inspections to identify and address any potential issues early.

Professional Repairs

Engage professional contractors with experience in dealing with PRC and RC structures for any necessary repairs. This ensures that repairs are conducted to a high standard and comply with current building regulations.

Moisture Management

Implement effective moisture management strategies to prevent damp issues. This may include improving ventilation, repairing any leaks, and using dehumidifiers where necessary.

Asbestos Management

If asbestos is present, ensure it is managed in accordance with current regulations. This may involve encapsulation or removal by licensed professionals.

Conclusion

Ketton Houses, with their unique construction and historical significance, offer a fascinating glimpse into early 20th-century British housing. While they come with their own set of challenges, understanding their construction, typical defects, and maintenance requirements can help home buyers and investors make informed decisions. Regular inspections and professional repairs are key to preserving the structural integrity and safety of these properties.

At Flettons, we’re committed to safeguarding your investment. When considering a property purchase, trust our seasoned expertise to reveal any hidden threats. For a thorough building survey, get your instant quote through our quote calculator or reach out directly at 0203 691 0451. Your home’s safety is our top priority.

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