Resiform Houses: A Comprehensive Guide for UK Home Buyers and Investors

Understanding Resiform Houses

Resiform houses, a unique type of system-built property, emerged in the mid-20th century as part of the UK’s post-war housing boom. These homes, primarily constructed in 1965, were designed to address the urgent need for affordable and quickly assembled housing. With only six known to have been built, Resiform houses are a rare find in today’s property market. This article delves into the intricacies of Resiform houses, offering valuable insights for potential buyers and investors.

Historical Context and Manufacturing

The Resiform house was a product of its time, reflecting the innovative spirit of the 1960s. Manufactured by William Old Ltd and designed by Richardson, Son & Knowles, along with Field and Shaw, these homes were part of a broader movement towards prefabricated housing solutions. The construction of Resiform houses was driven by the need for rapid housing development in the post-war era, where traditional building methods could not meet the demand.

Characteristics of Resiform Houses

Resiform houses are typically two-storey semi-detached or terraced properties. They are easily identifiable by their medium pitch gable roofs, which are often covered with interlocking concrete tiles. Alternatively, some feature flat roofs with bituminous felt coverings. The external walls are constructed from storey-height glass fibre reinforced resin panels, a distinctive feature that sets them apart from other system-built homes.

A notable architectural element is the flat canopy over the front door, adding a touch of modernist design to the otherwise utilitarian structure. These homes were designed with practicality in mind, offering a straightforward layout that maximized space and functionality.

Potential Hazards and Risks

While Resiform houses offer unique architectural features, they also come with certain risks and hazards. The use of glass fibre reinforced resin panels, backed with perforated asbestos cement sheets, poses potential health risks. Asbestos, a common building material in the mid-20th century, is now known for its hazardous properties, particularly when disturbed. Therefore, any renovation or maintenance work on these homes must be approached with caution.

Additionally, the structural integrity of Resiform houses can be compromised over time. The materials used in their construction, while innovative at the time, may not have the same longevity as traditional building materials. This can lead to issues such as dampness, insulation problems, and general wear and tear.

Legal Considerations: Defective Premises Act

When considering the purchase of a Resiform house, it’s crucial to understand its classification under the Defective Premises Act. This legislation, enacted to protect homeowners from substandard construction, may apply to Resiform houses due to their unique construction methods and materials. Buyers should seek legal advice to determine whether a specific property falls under this act and what implications it may have for ownership and maintenance.

Inspection Tips for Resiform Houses

Inspecting a Resiform house requires a keen eye and a thorough understanding of its construction. Here are some essential tips for conducting a comprehensive inspection:

1. External Walls: Examine the glass fibre reinforced resin panels for signs of damage or deterioration. Look for cracks, warping, or any indication of moisture ingress.

2. Roof Structure: Whether the roof is pitched or flat, check for any signs of leaks or damage to the bituminous felt or concrete tiles. Pay special attention to the condition of the timber joists and chipboard.

3. Asbestos Concerns: Given the presence of asbestos cement sheets, it’s vital to assess their condition. If any damage is detected, professional asbestos removal services should be engaged.

4. Insulation and Dampness: Inspect the glass fibre insulation quilt and timber studding for signs of dampness or mould. Proper insulation is crucial for maintaining a comfortable living environment.

5. Structural Integrity: Evaluate the PSA corner stanchions, perimeter beams, and other structural elements for any signs of weakness or corrosion.

Construction Details of Resiform Houses

Understanding the construction details of Resiform houses is essential for both buyers and surveyors. Here’s a breakdown of the typical construction elements:

• Substructure: Resiform houses are built on reinforced concrete (RC) raft foundations, providing a stable base for the structure.

• Frame: The frame consists of PSA corner stanchions and double PSA forming T intermediate stanchions, along with PSA perimeter beams. These elements form the core structural support.

• External Walls: The walls are made from storey-height glass fibre reinforced resin panels, backed with perforated asbestos cement sheets. The cavity is filled with glass fibre insulation, and the interior is lined with plasterboard.

• Separating Walls: These are timber frame cavity walls, also lined with plasterboard and insulated with glass fibre.

• Floors: The ground floor is typically concrete, while the first floor features chipboard on timber joists.

• Ceilings: Plasterboard is used for ceilings, providing a smooth finish.

• Roof: The roof structure includes timber joists, chipboard, glass fibre insulation, and bituminous felt.

Variants and Modifications

Over the years, some Resiform houses may have undergone modifications or variations. These can include:

• Lattice Steel Joists: Some homes may feature lattice steel joists at the first floor and roof level, offering additional structural support.

• Honeycomb Plasterboard Linings: This variant provides enhanced insulation and soundproofing.

• Suspended Timber Ground Floor: In some cases, the ground floor may be a suspended timber structure rather than concrete.

• Pitched Roof: A variant with timber trusses, bituminous felt, and interlocking concrete tiles may be present, offering a more traditional roof design.

Common Defects in Resiform Houses

Despite their innovative design, Resiform houses are not without their flaws. Common defects include:

• Dampness and Mould: Poor insulation and ventilation can lead to dampness and mould growth, particularly in the walls and ceilings.

• Structural Weakness: Over time, the PSA stanchions and beams may show signs of corrosion or weakening, compromising the structural integrity.

• Roof Leaks: The bituminous felt on flat roofs is prone to wear and tear, leading to potential leaks and water damage.

• Asbestos Risks: The presence of asbestos cement sheets poses a significant health risk if disturbed during renovations or repairs.

Maintaining and Improving Resiform Houses

Maintaining a Resiform house requires regular inspections and proactive measures to address potential issues. Here are some maintenance tips:

1. Regular Inspections: Conduct regular inspections of the roof, walls, and structural elements to identify any signs of damage or deterioration.

2. Asbestos Management: If asbestos is present, ensure it is properly managed and not disturbed. Engage professional services for any removal or encapsulation work.

3. Insulation Upgrades: Consider upgrading the insulation to improve energy efficiency and reduce the risk of dampness.

4. Roof Maintenance: Regularly check the condition of the roof covering and replace any damaged tiles or felt to prevent leaks.

5. Structural Repairs: Address any signs of structural weakness promptly to prevent further damage and ensure the safety of the property.

Conclusion

Resiform houses, with their unique construction and historical significance, offer a distinctive option for home buyers and investors in the UK. While they present certain challenges, understanding their characteristics and potential risks can help buyers make informed decisions. By conducting thorough inspections and maintaining the property diligently, owners can preserve the value and integrity of these rare 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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