The Boro house, also known as Borohus or Enso Gutzeit, represents a unique chapter in the history of British housing. Constructed primarily in 1969 by John Laing & Son Ltd, these homes are a testament to the innovative spirit of the post-war era. As an expert surveyor, I will guide you through the essential aspects of these properties, from their construction characteristics to potential hazards and inspection tips. Whether you’re a home buyer or an investor, understanding the intricacies of Boro houses can help you make informed decisions.

Historical Context and Manufacturing Details

The Boro house emerged during a period of rapid housing development in the UK. In the late 1960s, there was a pressing need for affordable and quickly constructed homes. John Laing & Son Ltd, a prominent construction company, responded to this demand by designing and manufacturing the Boro house. These homes were primarily built in 1969, with a focus on efficiency and cost-effectiveness.

The Boro house is a system-built property, meaning it was constructed using pre-fabricated components. This approach allowed for faster assembly and reduced construction costs. The design of the Boro house was influenced by Scandinavian architecture, which is evident in its clean lines and functional layout.

Typical Characteristics of Boro Houses

Boro houses are typically found as detached and semi-detached bungalows, chalet bungalows, and two-storey houses. They are characterized by their steep pitch gable roofs, which are covered with concrete tiles. These roofs often feature flat or inset dormer windows, adding to the distinctive appearance of the property.

The front and rear external walls of Boro houses are constructed using a combination of brick and vertical timber boarding. A band of horizontal timber boarding is often present above window head level and below sill level, providing a unique aesthetic touch. The gable walls are typically clad with brick, offering additional structural support.

Potential Hazards and Risks

While Boro houses offer several advantages, they also come with potential hazards and risks that buyers and investors should be aware of. One of the primary concerns is the use of timber in the construction of these homes. Timber, if not properly treated and maintained, can be susceptible to rot and insect infestation. This can compromise the structural integrity of the property over time.

Another potential risk is the presence of asbestos in some Boro houses. Asbestos was commonly used in construction materials during the 1960s and 1970s due to its fire-resistant properties. However, it is now known to pose serious health risks if disturbed. It is crucial to have a professional survey conducted to identify and safely manage any asbestos-containing materials.

Defective Premises Act and Boro Houses

The Defective Premises Act 1972 is a piece of legislation in the UK that aims to protect homeowners from defects in their properties. Under this act, a property is considered defective if it fails to provide a safe and habitable environment. While Boro houses are not specifically classified as defective under this act, it is essential to conduct thorough inspections to ensure they meet modern safety standards.

Inspection Tips for Boro Houses

When inspecting a Boro house, there are several key areas to focus on to ensure the property is in good condition. Here are some useful tips for conducting a thorough inspection:

1. Roof Inspection: Check the condition of the concrete tiles and dormer windows. Look for signs of wear, such as cracked or missing tiles, and ensure the roof is properly sealed to prevent water ingress.

2. Timber Frame Assessment: Examine the vertical and horizontal timber boarding for signs of rot or insect damage. Pay close attention to areas where the timber meets the brickwork, as these are common points of vulnerability.

3. Asbestos Survey: If the property was built before the 1980s, it is advisable to have an asbestos survey conducted by a qualified professional. This will help identify any asbestos-containing materials and provide guidance on safe management or removal.

4. Insulation Check: Inspect the mineral fibre insulation between the frame studs. Ensure it is in good condition and provides adequate thermal performance. Poor insulation can lead to increased energy costs and reduced comfort.

5. Structural Integrity: Assess the overall structural integrity of the property, paying particular attention to the separating walls and partitions. Look for any signs of movement or cracking, which could indicate underlying issues.

Construction Details of Boro Houses

Understanding the construction details of Boro houses can provide valuable insights into their strengths and weaknesses. Here is a breakdown of the typical construction elements:

• Substructure: Boro houses are built on concrete slab footings, providing a stable foundation. A damp-proof course (DPC) is typically installed to prevent moisture ingress.

• External Walls: The external walls are constructed using a platform frame method. Storey-height timber frame panels are sheathed externally with hardboard. The front and rear walls are directly clad with vertical timber boarding, while the gable walls are clad with brick.

• Separating Wall: The separating wall between properties is typically an 11-inch brick cavity wall, providing sound insulation and fire resistance.

• Partitions: Internal partitions are constructed using timber studs lined with plasterboard, offering flexibility in room layout.

• Floors: The ground floor is typically made of concrete, providing durability and stability. The construction details of the first floor are not well-documented, but it is likely to be similar to other system-built properties of the era.

• Ceilings: Ceilings are lined with plasterboard, providing a smooth finish and accommodating insulation.

• Roof: The roof structure consists of timber joists, tongue-and-groove timber decking, and three layers of roofing felt. Mineral fibre insulation is installed at ceiling level to enhance thermal performance.

Common Defects in Boro Houses

Like any property type, Boro houses can experience common defects that require attention. Here are some of the most frequently encountered issues:

• Timber Decay: As mentioned earlier, timber decay is a significant concern in Boro houses. Regular maintenance and treatment are essential to prevent rot and insect infestation.

• Roofing Issues: The concrete tiles and roofing felt can deteriorate over time, leading to leaks and water damage. Regular inspections and timely repairs are crucial to maintaining the roof’s integrity.

• Insulation Problems: Inadequate or deteriorated insulation can result in increased energy costs and reduced comfort. Upgrading insulation can improve energy efficiency and reduce heating expenses.

• Asbestos Concerns: If asbestos-containing materials are present, they must be managed or removed safely to prevent health risks. Professional guidance is essential in handling asbestos-related issues.

• Structural Movement: Cracks or movement in the structure can indicate underlying issues with the foundation or construction. A structural engineer should assess any significant movement to determine the cause and recommend appropriate solutions.

Conclusion

Boro houses, with their distinctive design and historical significance, offer a unique opportunity for home buyers and investors in the UK. Understanding the construction details, potential hazards, and common defects of these properties is essential for making informed decisions. By conducting thorough inspections and addressing any issues promptly, you can ensure the longevity and safety of your investment.

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.

---