MUNDIC BLOCK EXTENSIONS CORNWALL

Expert guide to building extensions on Mundic block properties in Cornwall. What you need to know.

What is Mundic Block?

Mundic block is a type of concrete block used in construction across Cornwall and Devon from the 1920s to the 1950s. It was made using local aggregate containing sulphide minerals, which can deteriorate over time. Many properties in Cornwall were built using Mundic block, and it can affect the ability to get a mortgage and insurance.

Can You Extend a Mundic Block Property?

Yes, you can extend a Mundic block property, but it requires specialist knowledge and careful planning. The existing Mundic block structure must be assessed by a qualified structural engineer before any extension work begins. The extension itself should be built using modern materials that are compatible with the existing structure.

Mundic Block Assessment

Before building an extension on a Mundic block property, a Mundic assessment is required. This involves taking core samples from the existing structure and having them analysed by a specialist laboratory. The results determine the classification of the Mundic block (Class A, B or C) and what remedial work may be required.

Structural Considerations

Mundic block properties require careful structural assessment before any extension work. The existing foundations, walls and roof structure must all be checked for integrity. In some cases, the existing structure may need to be reinforced or partially rebuilt before an extension can be added safely.

Mortgage & Insurance Implications

Mundic block properties can be difficult to mortgage and insure. Lenders and insurers may require a Mundic assessment report before offering a mortgage or insurance policy. If you are planning to extend a Mundic block property, it is important to check with your lender and insurer before starting work.

Choosing the Right Builder

Not all builders have experience working with Mundic block properties. It is essential to choose a builder who understands the specific challenges of Mundic block construction and has experience working with structural engineers and specialist surveyors. A.V.A Building & Construction Ltd have extensive experience with Mundic block properties across Cornwall.

Planning Permission for Mundic Properties

Planning permission requirements for extensions on Mundic block properties are the same as for any other property. However, if the property is in a conservation area or AONB, additional restrictions may apply. We always check planning requirements before starting any project.

Our Approach to Mundic Block Extensions

At A.V.A Building & Construction Ltd, we take a careful, methodical approach to Mundic block extensions. We work closely with structural engineers and specialist surveyors to ensure that all work is safe, compliant and of the highest quality. Contact us for a free consultation on your Mundic block extension project.

Mundic Block Extension Specialists in Cornwall

Expert Mundic Block Builders in Cornwall

A.V.A Building & Construction Ltd have extensive experience building extensions on Mundic block properties across Truro, Falmouth and surrounding villages in Cornwall. As members of the Guild of Master Craftsmen, all our work is fully insured and guaranteed.

Contact us today for a free consultation on 01872 719546 or email avabuildingltd@outlook.com.

Brick and timber home extension with glazed garden room — AVA Building, Truro Cornwall
Brick rear extension with black aluminium bifold doors — AVA Building, Truro Cornwall

FAQ

Mundic block is a type of concrete block used in building construction in Cornwall and parts of Devon from the 1890s to the 1950s. It contains mine waste (mundic) which can deteriorate over time.
Yes, it is possible to extend a mundic block property, but it requires careful assessment and specialist knowledge. The foundations and connection details need particular attention.
A mundic block survey (petrographic test) can determine if your property contains mundic block and assess its condition. This is typically required by mortgage lenders for properties in affected areas.
Yes, we have extensive experience working with mundic block properties in Cornwall. Contact us to discuss your project.

Client Testimonials

"A.V.A did a fantastic job on our kitchen extension. Professional, tidy and the quality of work is outstanding. Highly recommend."
Sarah T., Truro
Homeowner
"We used A.V.A for our bathroom renovation and couldn't be happier. Excellent workmanship and they finished on time and on budget."
Mark H., Falmouth
Homeowner
"Large job lasting near to 12 months. First class service. Always on site on time, no surprise costs and the job completed on budget. All work explained; an open & honest tradesman."
David R., Redruth
Homeowner

Ready to Start Your Project?

Contact us today for a free, no-obligation quote. We serve Truro, Falmouth and all surrounding villages.