Understanding the Integer House

The Integer House, a unique property type, holds a significant place in the UK’s architectural history. Manufactured by Fitzpatrick & Son Ltd in the 1960s, these properties are a testament to the innovative construction techniques of their time. As an expert surveyor, I will delve into the intricate details of these houses, providing you with a thorough understanding of their construction, typical characteristics, potential hazards, and inspection guidelines.

Historical Context and Manufacturing Details

Period and Location

The Integer House was predominantly built during the 1960s, a period marked by rapid urban development and a need for cost-effective housing solutions. Only 30 of these detached bungalows were constructed, making them relatively rare. These properties are typically found in suburban areas, where the demand for single-family homes was high during that era.

Manufacturers and Designers

Fitzpatrick & Son Ltd, a reputable construction company, were the masterminds behind the Integer House. Their innovative approach to building and use of modern materials set these homes apart from traditional brick-and-mortar constructions. The designers aimed to create a functional, aesthetically pleasing, and affordable housing solution, which they achieved through the use of prefabricated components and advanced construction techniques.

Typical Characteristics of the Integer House

Architectural Features

The Integer House is easily identifiable by its distinct architectural features. These detached bungalows boast a flat roof with a generous overhang on both the front and rear elevations. The external walls are composed of flat PS panels clad with aluminium sheets, interspersed with large areas of glazing. This design not only provides a modern aesthetic but also allows for ample natural light within the living spaces.

Construction Details

Substructure

The substructure of the Integer House consists of a reinforced concrete (RC) slab, providing a solid and stable foundation for the property.

Frame

The main frame is constructed using a setting out jig, with PS panel framing based on a 4-foot module. PS vertical jointing tubes are used to connect the panels, ensuring structural integrity. The frame is protected with a galvanised coating to prevent corrosion and enhance durability.

External Walls

The external walls are made up of flat aluminium sheets, expanded polyurethane foam, a cavity, and plasterboard. This multi-layered construction provides excellent insulation and weather resistance.

Roof

The roof is constructed using lattice steel roof joists and woodwool slabs, offering a lightweight yet robust structure. The flat design with overhangs helps in managing rainwater runoff and provides shade to the windows.

Internal Partitions

Internal partitions are created using PS panel framing lined with plasterboard, ensuring a lightweight and flexible interior layout.

Floors and Ceilings

The ground floor is made of concrete, providing a durable and stable surface. Ceilings are lined with plasterboard, maintaining a consistent aesthetic throughout the interior.

Potential Hazards and Risks

Structural Concerns

One of the primary concerns with the Integer House is the potential for structural issues, particularly related to the steel frame. Over time, the galvanised coating may deteriorate, leading to corrosion of the steel components. This can compromise the structural integrity of the property, making regular inspections crucial.

Insulation and Energy Efficiency

While the expanded polyurethane foam used in the walls provides good insulation, the large areas of glazing can result in heat loss during the winter months. This can lead to higher energy bills and a less comfortable living environment. Upgrading the windows to double or triple glazing can help mitigate this issue.

Moisture and Dampness

The flat roof design, although aesthetically pleasing, can be prone to water pooling and leaks if not properly maintained. Regular inspections and maintenance of the roof are essential to prevent moisture ingress and potential damage to the interior.

Aluminium Cladding

The aluminium cladding, while durable, can be susceptible to denting and damage from impacts. Additionally, it may require periodic cleaning and maintenance to prevent oxidation and maintain its appearance.

Legal Considerations

Defective Premises Act

The Integer House is not classified as defective under the Defective Premises Act. However, given its unique construction and potential for specific issues, it is essential to conduct thorough inspections and address any identified problems promptly.

Inspection Guidelines for Surveyors

Preliminary Assessment

Before conducting a detailed inspection, gather as much information as possible about the property, including its construction history, previous maintenance records, and any known issues. This will help you focus your inspection on potential problem areas.

External Inspection

Roof

Inspect the flat roof for signs of water pooling, leaks, or damage to the woodwool slabs and lattice steel joists. Check the overhangs for any signs of deterioration or damage.

Walls

Examine the aluminium cladding for dents, oxidation, or other damage. Check the condition of the expanded polyurethane foam and plasterboard for any signs of moisture ingress or deterioration.

Internal Inspection

Frame

Inspect the steel frame for signs of corrosion, particularly at the joints and connections. Ensure that the galvanised coating is intact and providing adequate protection.

Floors and Ceilings

Check the concrete ground floor for cracks or other damage. Inspect the plasterboard ceilings for signs of moisture damage or sagging.

Partitions

Examine the internal partitions for any signs of damage or deterioration. Ensure that the PS panel framing is intact and providing adequate support.

Utilities and Services

Inspect the plumbing, electrical, and heating systems for any signs of wear or damage. Ensure that all systems are functioning correctly and meet current safety standards.

Typical Defects and Maintenance Tips

Common Defects

Corrosion of Steel Frame

As mentioned earlier, corrosion of the steel frame is a common issue with the Integer House. Regular inspections and maintenance of the galvanised coating can help prevent this problem.

Roof Leaks

The flat roof design can be prone to leaks if not properly maintained. Regular inspections and prompt repairs of any damage can help prevent moisture ingress and potential interior damage.

Insulation Issues

While the expanded polyurethane foam provides good insulation, the large areas of glazing can result in heat loss. Upgrading to double or triple glazing can help improve energy efficiency and comfort.

Maintenance Tips

Regular Inspections

Conduct regular inspections of the roof, walls, and steel frame to identify and address any issues promptly. This can help prevent minor problems from becoming major concerns.

Upgrading Windows

Consider upgrading the windows to double or triple glazing to improve energy efficiency and reduce heat loss.

Roof Maintenance

Ensure that the flat roof is properly maintained, with regular inspections and prompt repairs of any damage. This can help prevent leaks and moisture ingress.

Cleaning and Maintenance of Aluminium Cladding

Regularly clean and maintain the aluminium cladding to prevent oxidation and maintain its appearance. This can help extend the lifespan of the cladding and keep the property looking its best.

Conclusion

The Integer House, with its unique construction and architectural features, offers a fascinating glimpse into the innovative housing solutions of the 1960s. While these properties come with their own set of challenges, understanding their construction, potential hazards, and maintenance requirements can help you make an informed decision when considering a purchase. Regular inspections and prompt maintenance are key to preserving the structural integrity and aesthetic appeal of these homes.

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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