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John Castell

Federation of Damp Certified Surveyor

John Castell FODCS

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My Story

Independent Damp & Mould Surveyor in Devon

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I provide independent damp surveys, mould inspections and specialist damp-related building condition reports across Devon and the South West, working with homeowners, landlords, businesses and housing providers.

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My service is focused on accurate diagnosis of damp and mould problems, helping clients understand the true cause before committing to any remedial work.

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Experience Across Domestic & Commercial Buildings

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I have spent my career working in property surveying, renewable energy and social housing, inspecting and managing thousands of properties of all types, including:
 

  • Private homes and rental properties

  • Landlord and letting agent portfolios

  • Housing Association stock

  • MOD office buildings

  • Large medical practices

  • Schools and Commercial premises

  • Listed Buildings
     

This broad experience allows me to assess damp, mould and localized building defects in both residential and commercial environments.

I also provide independent damp reports to support clients during the mortgage and lending process, helping buyers identify moisture-related risks before purchase.
 

Qualifications & Professional Background

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  • FODCS – Federation of Damp Certified Surveyor

  • Level 4 DEA & NDEA – Domestic & Non-Domestic Energy Assessor

  • Government Registered GDA

  • HHSRS – Housing Health & Safety Rating System Assessor

  • IOSH – Health & Safety Management

 

Legal & Survey Scope Notice: While my background spans energy, and hazard assessment disciplines, all instructions are strictly accepted for specialist Damp & Timber surveys. These separate technical disciplines are excluded from active testing, and no structural valuations are provided. All inspections are non-invasive utilising existing openings only.

 

Independent Damp Surveys – A Different Approach

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Unlike many companies offering “free damp surveys”, I do not sell remedial treatments.
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My role is to provide independent, evidence-based damp and mould surveys so you can make the right decision first time.

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I take a holistic, whole-building diagnostic approach within the visible constraints of the property, considering:

  • Ventilation and condensation risk

  • Building construction and visible defects

  • Heating patterns and insulation

  • Moisture movement and bridging

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This ensures the root cause is identified, not just the symptoms.

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Affordable & Proportionate Surveys

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I aim to provide affordable damp surveys in Devon, with a clear and proportionate scope.

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You only pay for the level of investigation that is genuinely required — no unnecessary work, no inflated recommendations.

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Areas Covered

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I carry out damp and mould surveys across:

  • Devon

  • Exeter

  • Torbay

  • Plymouth

  • Surrounding areas in the South West
     

Book a Damp Survey in Devon

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If you need an independent damp survey, mould inspection or building report in Devon, I’m happy to help.

Contact me today to discuss your property or arrange a survey.

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