Introduction to the Balency House
The Balency House, a notable example of system-built properties in the UK, represents a significant chapter in the history of British housing. Constructed primarily during the 1960s and 1970s, these properties were designed to address the post-war housing shortage. As an expert surveyor, I will delve into the intricate details of the Balency House, providing you with a thorough understanding of its construction, typical characteristics, potential hazards, and inspection guidelines.
Historical Context and Manufacturing
Period and Location
The Balency House was predominantly built between the 1960s and 1970s, a period marked by a pressing need for rapid and cost-effective housing solutions. These properties are typically found in urban and suburban areas across the UK, where there was a high demand for affordable housing.
Manufacturers and Designers
The Balency House was manufactured by Holland & Hannan & Cubitts Ltd, a prominent construction company known for its innovative approach to building. The design of these houses was a collaborative effort, involving various architects and engineers who aimed to create functional and durable homes.
Characteristics of the Balency House
Structural Features
The Balency House is a three-storey terraced property, often featuring integral ground floor garages. This design was intended to maximize space and provide practical living solutions for families.
Roof
The roof of the Balency House is flat and typically covered with asphalt. This design choice was common during the period and aimed at reducing construction costs while providing a modern aesthetic.
External Walls
The external walls are constructed from large storey-height precast concrete (PC) panels. These panels may have a plain, sand-blasted, or scrubbed finish, or be clad with stone or glass mosaic. The use of PC panels was a hallmark of system-built properties, offering both structural integrity and ease of assembly.
Internal Walls and Partitions
The internal walls, including separating walls, are also made from storey-height PC sandwich panels with an insulating core of polystyrene or lightweight aggregate no-fines concrete. This construction method provided good thermal insulation and soundproofing.
Floors
The ground floor is typically made of concrete, while the upper floors consist of PC slabs. This robust construction ensures durability and stability.
Ceilings
Ceilings in the Balency House are usually plastered, providing a smooth and clean finish.
Potential Hazards and Risks
Structural Concerns
One of the primary concerns with the Balency House is the potential for structural issues related to the use of precast concrete. Over time, concrete can suffer from various forms of degradation, including carbonation and corrosion of the steel reinforcement.
Carbonation
Carbonation is a chemical reaction that occurs when carbon dioxide from the air penetrates the concrete and reacts with calcium hydroxide to form calcium carbonate. This process can reduce the alkalinity of the concrete, leading to the corrosion of the embedded steel reinforcement. The depth of carbonation can be assessed using guidelines provided in BRE Report BR 19.
Corrosion of Steel Reinforcement
Corrosion of the steel reinforcement is a significant risk in older concrete structures. This can lead to cracking, spalling, and ultimately, a reduction in the structural integrity of the building. Guidance on assessing and mitigating this risk can be found in BRE Digest 444, Parts 1-3.
Thermal Insulation and Energy Efficiency
While the insulating core of the PC panels provides some thermal insulation, the overall energy efficiency of the Balency House may not meet modern standards. Upgrading insulation and improving airtightness can help enhance energy performance.
Water Ingress and Dampness
Flat roofs, such as those found on the Balency House, are prone to water ingress and dampness issues. Regular maintenance and timely repairs are essential to prevent water-related damage.
Defective Premises Act and Classification
The Balency House is not classified as defective under the Defective Premises Act. However, it is essential to conduct thorough inspections to identify any potential issues and ensure the property meets current safety and habitability standards.
Inspection Guidelines for Surveyors
Pre-Inspection Preparation
Before conducting an inspection, it is crucial to gather all relevant information about the property, including historical data, previous inspection reports, and any known issues. This preparation will help you focus on critical areas and identify potential problems more effectively.
External Inspection
Roof
Inspect the flat roof for signs of wear and tear, including cracks, blisters, and ponding water. Check the condition of the asphalt covering and ensure that drainage systems are functioning correctly.
External Walls
Examine the external walls for signs of cracking, spalling, and other forms of concrete degradation. Pay particular attention to areas around windows and doors, where water ingress is more likely to occur.
Internal Inspection
Walls and Partitions
Check the internal walls and partitions for signs of movement, cracking, and dampness. Use a moisture meter to detect hidden damp issues and assess the condition of the insulation core.
Floors
Inspect the ground and upper floors for signs of settlement, cracking, and unevenness. Pay attention to any areas where the floor feels spongy or unstable, as this could indicate underlying structural issues.
Ceilings
Examine the ceilings for signs of cracking, staining, and dampness. Check for any areas where the plaster has become loose or detached.
Specialist Testing
In some cases, it may be necessary to conduct specialist testing to assess the condition of the concrete and steel reinforcement. This can include carbonation depth testing, chloride ion testing, and half-cell potential measurements.
Typical Defects and Maintenance
Common Defects
Concrete Degradation
As mentioned earlier, concrete degradation is a common issue in Balency Houses. This can manifest as cracking, spalling, and delamination of the concrete surface.
Steel Corrosion
Corrosion of the steel reinforcement can lead to significant structural issues. Look for signs of rust staining, cracking, and spalling around areas where the steel is embedded.
Water Ingress
Flat roofs are particularly susceptible to water ingress. Check for signs of dampness, staining, and mould growth on the ceilings and upper walls.
Maintenance Tips
Regular Inspections
Conduct regular inspections to identify and address issues before they become severe. Pay particular attention to the roof, external walls, and areas prone to dampness.
Timely Repairs
Carry out timely repairs to address any defects identified during inspections. This can include patching cracks, resealing the roof, and treating corroded steel reinforcement.
Upgrading Insulation
Consider upgrading the insulation in the walls and roof to improve energy efficiency and reduce heating costs.
Conclusion
The Balency House, with its distinctive design and construction, represents an important part of the UK’s housing history. While these properties offer many benefits, including robust construction and practical living spaces, they also come with potential risks and maintenance challenges. By understanding the typical characteristics, hazards, and inspection guidelines, home buyers and investors can make informed decisions and ensure the long-term safety and durability of their investment.
At Flettons, we’re committed to safeguarding your investment. When considering a property purchase, trust our seasoned expertise to uncover any hidden risks. For a thorough building survey, get your instant quote through our online calculator or call us directly on 0330 043 4650. Your home’s safety is our top priority. Disclaimer: This article is provided for general educational purposes only and is based on industry research, professional knowledge, and experience. It does not relate to any specific property and should not be relied upon when making a purchasing decision. Prospective purchasers should always commission an independent RICS-qualified surveyor to conduct a full inspection and provide a report on the actual condition of any property of interest.
