The Midlands Housing Consortium (MHC) House: An Overview

The Midlands Housing Consortium (MHC) house represents a significant chapter in the history of British housing. Constructed between 1965 and 1975, these homes were part of a broader initiative to address the post-war housing shortage. The MHC, led by designer F. Lloyd Roche, produced approximately 11,000 units, including both bungalows and two-storey terraced houses. These properties are primarily located in the Midlands region, although they can be found in other parts of the UK as well.

Manufacturers and Design Characteristics

The MHC houses were manufactured by the Midlands Housing Consortium, a collaboration of various builders and designers. The design of these homes was innovative for its time, featuring a medium pitch hipped, gable, or monopitch roof covered with concrete tiles. The external walls were typically constructed of brick, either throughout or combined with vertical timber boarding and tile hanging. A distinctive feature of these houses is the sloping tiled canopy over the front door, which adds a unique architectural element.

Construction Details

Understanding the construction of MHC houses is crucial for potential buyers and investors. These homes were built on concrete strip footings with a brick under-building and a damp-proof course (DPC) to prevent moisture ingress. The external walls employed a direct platform frame construction, using storey-height timber frame panels sheathed externally with bituminous fibreboard or plywood at the corners. This was overlaid with a breather membrane and separately clad with brick. Internally, the walls were lined with foil-backed plasterboard, with mineral fibre insulation placed between the frame studs.

The separating walls between properties were constructed using a timber frame cavity backed with plywood and lined with three layers of plasterboard. This cavity was filled with paper-laminated mineral fibre insulation to enhance soundproofing and thermal efficiency. Internal partitions were made of timber stud lined with plasterboard.

The ground floor was typically concrete, while the first floor featured tongue-and-groove boarding on timber joists supported by joist hangers. Ceilings were finished with plasterboard, and the roof structure comprised timber trusses, bituminous felt, and concrete tiles, with mineral fibre insulation at ceiling level.

Variants and Modifications

Over the years, some MHC houses have undergone modifications. Variants include external walls clad with vertical timber boarding on timber battens to the first floor level, with tile hanging on timber battens above. In some cases, the external walls were lined with plasterboard overlaid with a polyethylene vapour control layer. The separating walls might also be masonry cavity walls lined with plasterboard on timber battens or dabs.

Typical Hazards and Risks

While MHC houses were innovative for their time, they are not without their challenges. One common issue is the differential movement of window sills, which can lead to structural concerns if not addressed. Additionally, the use of timber in the construction can pose a risk of rot or insect infestation if not properly maintained. The bituminous fibreboard used in the external sheathing can also degrade over time, potentially compromising the integrity of the building envelope.

Defective Premises Act Considerations

When considering the purchase of an MHC house, it’s important to understand its classification under the Defective Premises Act. While these homes are not inherently classified as defective, certain issues, such as structural movement or inadequate insulation, could lead to them being considered as such if they pose a risk to the occupants’ safety or health. A thorough survey by a qualified professional is essential to identify any potential defects and ensure compliance with current building standards.

Inspection Tips for MHC Houses

For those inspecting an MHC house, there are several key areas to focus on:

1. Foundation and Substructure: Check for signs of subsidence or movement in the concrete strip footings and brick under-building. Look for cracks or uneven surfaces that may indicate structural issues.

2. External Walls: Inspect the condition of the brickwork, timber boarding, and tile hanging. Look for signs of weathering, rot, or insect damage, particularly in the timber elements.

3. Roof Structure: Examine the roof for missing or damaged tiles, and check the condition of the bituminous felt and timber trusses. Ensure that the mineral fibre insulation is intact and providing adequate thermal protection.

4. Internal Walls and Partitions: Assess the condition of the plasterboard lining and check for any signs of moisture ingress or damage. Pay attention to the separating walls for soundproofing and thermal efficiency.

5. Windows and Doors: Look for signs of differential movement around window sills and door frames. Ensure that all openings are properly sealed and functioning correctly.

6. Insulation and Ventilation: Verify the presence and condition of mineral fibre insulation in the walls and roof. Check for adequate ventilation to prevent condensation and mould growth.

Common Defects in MHC Houses

Despite their robust construction, MHC houses can suffer from several common defects:

• Timber Decay: The use of timber in the construction can lead to decay if not properly maintained. Regular inspections and maintenance are essential to prevent rot and insect infestation.

• Moisture Ingress: The bituminous fibreboard used in the external sheathing can degrade over time, allowing moisture to penetrate the building envelope. This can lead to dampness and mould growth if not addressed.

• Structural Movement: Differential movement of window sills and other structural elements can occur, leading to cracks and other issues. This is often due to the natural settling of the building over time.

• Insulation and Energy Efficiency: While MHC houses were designed with insulation in mind, the materials used may not meet current energy efficiency standards. Upgrading the insulation and improving ventilation can enhance the property’s thermal performance.

Maintaining and Upgrading MHC Houses

For owners of MHC houses, regular maintenance and upgrades can help preserve the property’s value and ensure its longevity. Here are some tips for maintaining and upgrading these homes:

• Regular Inspections: Conduct regular inspections of the property’s key components, including the roof, walls, and foundation. Address any issues promptly to prevent further damage.

• Timber Treatment: Treat timber elements with appropriate preservatives to prevent rot and insect infestation. Replace any damaged or decayed timber promptly.

• Moisture Management: Ensure that the building envelope is properly sealed to prevent moisture ingress. Install or upgrade ventilation systems to reduce condensation and improve indoor air quality.

• Insulation Upgrades: Consider upgrading the insulation in the walls and roof to improve energy efficiency. This can help reduce heating costs and enhance the property’s comfort.

• Structural Repairs: Address any structural movement or cracks promptly. Consult a qualified structural engineer if necessary to assess and repair any significant issues.

The Future of MHC Houses

As the UK housing market continues to evolve, MHC houses remain a valuable part of the country’s architectural heritage. With proper maintenance and upgrades, these homes can continue to provide comfortable and affordable housing for many years to come. For investors, MHC houses offer a unique opportunity to acquire a piece of British history while benefiting from potential capital appreciation.

Conclusion

The MHC house is a testament to the ingenuity and resourcefulness of post-war Britain. While these homes present certain challenges, they also offer unique opportunities for buyers and investors. By understanding the construction, potential hazards, and maintenance requirements of MHC houses, you can make informed decisions and ensure the long-term success 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.

---