Historical Context and Background

The East Knowle Special house is a unique and intriguing property type that has piqued the interest of home buyers and investors alike. Built in 1939, these properties are a testament to the architectural and construction innovations of their time. They are predominantly found in the UK, with a significant number of them located in suburban areas. The East Knowle Special houses were designed and manufactured by a consortium of builders and architects who aimed to provide affordable yet durable housing solutions during a period of rapid urban expansion.

Manufacturers and Designers

The East Knowle Special houses were the brainchild of a group of forward-thinking architects and builders who sought to address the housing shortage in the late 1930s. The primary manufacturers were local construction firms that collaborated with architects to create a design that was both cost-effective and robust. The designers focused on using readily available materials and innovative construction techniques to expedite the building process without compromising on quality.

Typical Characteristics

Architectural Features

The East Knowle Special houses are easily identifiable by their distinct architectural features. They are typically detached bungalows or chalet bungalows, characterized by their steep pitch single or double gable roofs covered with tiles. The external walls are often made of mock ashlar block, giving them a unique and aesthetically pleasing appearance.

Construction Details

Substructure

The substructure details of the East Knowle Special houses are not well-documented. However, it is known that they include a damp-proof course (DPC) to prevent moisture ingress.

External Walls

The external walls are constructed using 4′ x 7″ storey height dense and clinker aggregate PRC (Precast Reinforced Concrete) panels. These panels are cavity walls, with a storey height timber frame sheathed internally and externally with asbestos cement sheets. The cavities are infilled with clinker aggregate concrete, providing additional insulation and structural integrity.

Separating Walls and Partitions

The specifics of the separating walls and partitions are not well-documented. However, it is likely that they were constructed using similar materials and techniques as the external walls to maintain consistency and structural integrity.

Floors

The ground floor is typically made of concrete, providing a solid and durable base. The first floor consists of timber boarding on timber joists, with plasterboard ceilings.

Roof

The roof structure comprises timber purlins and rafters, covered with tiles. This design not only provides excellent weather resistance but also contributes to the overall aesthetic appeal of the property.

Typical Hazards and Risks

Asbestos

One of the primary concerns with East Knowle Special houses is the presence of asbestos cement sheets used in the construction of the external walls. Asbestos is a hazardous material that can pose significant health risks if disturbed. It is crucial to have a professional survey conducted to assess the presence and condition of asbestos before undertaking any renovation or demolition work.

Concrete Degradation

The use of clinker aggregate concrete in the construction of the external walls can lead to potential issues with concrete degradation over time. Factors such as carbonation and chloride ingress can cause the steel reinforcement within the concrete to corrode, leading to structural weaknesses. Regular inspections and maintenance are essential to identify and address any signs of concrete degradation.

Damp and Moisture Ingress

Despite the presence of a damp-proof course, East Knowle Special houses may still be susceptible to damp and moisture ingress, particularly in the substructure and external walls. It is important to conduct thorough inspections to identify any signs of dampness and take appropriate remedial measures to prevent further damage.

Defective Premises Act

The East Knowle Special houses are not classified as defective under the Defective Premises Act. However, given their age and the potential hazards associated with their construction materials, it is essential to conduct thorough surveys and assessments to ensure their safety and structural integrity.

Inspection Guide for Surveyors

External Walls

When inspecting the external walls of an East Knowle Special house, surveyors should pay close attention to the condition of the PRC panels and the presence of any cracks or signs of degradation. It is also important to assess the condition of the asbestos cement sheets and check for any signs of damage or deterioration.

Roof Structure

The roof structure should be inspected for any signs of damage or wear, particularly in the timber purlins and rafters. Surveyors should also check the condition of the roof tiles and ensure that they are securely in place and free from damage.

Floors

The ground floor should be inspected for any signs of cracking or movement, which could indicate potential issues with the substructure. The first floor should be checked for any signs of sagging or unevenness, which could indicate problems with the timber joists or boarding.

Damp and Moisture

Surveyors should conduct thorough inspections for any signs of damp or moisture ingress, particularly in the substructure and external walls. This may involve the use of moisture meters and other diagnostic tools to identify areas of concern.

Asbestos

Given the presence of asbestos cement sheets in the construction of the external walls, it is essential to conduct a thorough asbestos survey to assess the condition and presence of asbestos. Any work involving asbestos should be carried out by licensed professionals to ensure safety and compliance with regulations.

Typical Defects and Maintenance

Concrete Degradation

As mentioned earlier, concrete degradation is a common issue in East Knowle Special houses. Regular inspections and maintenance are essential to identify and address any signs of degradation, such as cracking or spalling. Remedial measures may include concrete repairs, application of protective coatings, and reinforcement of the affected areas.

Asbestos Management

Proper management of asbestos is crucial to ensure the safety of the occupants. This may involve encapsulation or removal of asbestos-containing materials, depending on their condition and location. It is important to engage licensed asbestos professionals to carry out any work involving asbestos.

Damp and Moisture Control

Addressing damp and moisture issues is essential to prevent further damage to the property. This may involve the installation of additional damp-proofing measures, such as damp-proof membranes or chemical damp-proof courses. It is also important to ensure proper ventilation and drainage to prevent moisture buildup.

Roof Maintenance

Regular maintenance of the roof is essential to ensure its longevity and performance. This may involve replacing damaged or missing tiles, repairing any damage to the timber structure, and ensuring that the roof is properly ventilated to prevent moisture buildup.

Conclusion

The East Knowle Special house is a unique and historically significant property type that offers both charm and potential challenges for home buyers and investors. Understanding the typical characteristics, hazards, and maintenance requirements of these properties is essential to ensure their safety and longevity. By conducting thorough inspections and addressing any issues promptly, you can safeguard your investment and enjoy the unique charm of an East Knowle Special house.

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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