Condensation Risk Analysis

Make sure your building is moisture-protected 
and regulation-ready

Promoting building durability, occupant comfort, and Building Regulations compliance

Condensation risk analysis (CRA) should be considered for both residential and non-residential schemes, as advised under Approved Document C (AD-C) of the building regulations in England and Wales, or Section 3 in Scotland. It is typically a requirement from warranty providers, too.

Our condensation risk analysis service assesses the potential for moisture build-up within your building’s elements, such as its walls, roofs, and floors. The report we produce also identifies any risks associated with surface and interstitial condensation, which can cause mould growth, material degradation, and, in severe cases, structural damage.

Hidden moisture can increase repair costs and compromise the property’s performance, not to mention lead to a range of health problems for those who regularly use the space. It makes sense, then, to identify moisture-prone areas as soon as possible and do everything you can to reduce the impact of condensation on your building’s efficacy.

Why do you need this service?

Prevent structural
damage

Reducing condensation risk will protect your property against moisture-related weakening of materials and long-term structural issues.

Ensure building
compliance

This work aligns with BS EN ISO 13788 and UK Building Regulations, so meets current moisture control standards.

Create a healthier
indoor environment

Preventing moisture build-up will reduce the growth of mould and mildew, resulting in a safer and more comfortable space for occupants.

Collect construction details, 

including material specifications and building plans.

Perform an analysis

by simulating moisture conditions and assessing condensation risks.

Optimise results by reviewing and refining

calculations to ensure precision.

Issue the reports

in comprehensive documents, with clear improvement strategies.

Why choose Energy Digest?

Our condensation risk analysis service will ensure your building stays durable and compliant – and because we can produce thorough reports in just 24 hours, you can trust our energy consultants to help you keep your compliance requirements on track. 
We will provide tailored calculations for unique project specifications across all building elements, and even combine these with U-value calculations to simplify your workflows. You’ll receive our expert guidance on insulation, vapour barriers, and moisture management strategies, so you know precisely which materials you’ll need to use to improve your building’s resilience to condensation, and which actions you’ll need to take to achieve optimal results.

Our condensation risk analysis packages also include up to 3 revisions as standard, so we can adjust the data as your designs evolve.

Fast turnaround time

To help you meet your own deadlines, we’ll issue your condensation risk analysis report within 24 hours.

Multi-disciplined team

We cover 20+ services in the built environment, with specialists providing high-value calculations and strong advice.

Practical solutions

Our professionals provide recommendations that are calculated to ensure real world outcomes, resulting in cost-effectiveness and high impact.

Unrivalled support

Our service doesn’t end with the reports. We can provide ongoing support and expertise, from planning to completion.

Speak to our
experts today

FREQUENTLY ASKED QUESTIONS

Condensation Risk Analysis
FAQs

Thermal bridges create cold spots where temperatures drop below the dew point, encouraging condensation and potential mould growth.

BS EN ISO 13788 provides guidelines for assessing surface and interstitial condensation risks, ensuring compliance with UK Building Regulations.

We use thermal modelling software and dew point calculators to simulate moisture conditions and identify high-risk areas.

Yes, it ensures added insulation or material changes in retrofits don’t inadvertently increase condensation risks, balancing moisture control and thermal performance.

What’s the difference between surface and interstitial
condensation?

Though equally as damaging, surface and interstitial condensation appear in slightly different ways.

Surface condensation occurs on visible surfaces, such as walls, windows, or ceilings, when air moisture condenses due to a drop in temperature below the dew point. It’s typically caused by poor insulation, thermal bridging, or high indoor humidity levels – and it presents itself as condensation on cold windowpanes in the winter, or water droplets on poorly insulated exterior walls.

Interstitial condensation isn’t as immediately visible. It accumulates inside building components, in the spaces where water vapour infiltrates the materials and condenses, usually when warm, moist air passes through a structure and cools down as it encounters a colder area. Interstitial condensation is harder to detect, but it can cause significant structural concerns if left to its own devices, as well as reduce the thermal performance of any thermal insulation. 
Our consultants will assess both condensation types within our condensation risk analysis service.

Spoke with Josh who not only reassured me but asked for a fee that I thought was fair. Thank you Josh. Use again? Definitely.

Steve Quirk

The team really know their stuff – super helpful and always had clear answers to any questions or compliance issues we ran into. Definitely our go-to for any future projects!

Nathan Donnelly

Quick and well priced water calculation service and received an appliance specification report alongside the certificate which was really useful for us and the building control officer, highly recommended!

Ilma Akhtar

Very knowledgeable about building regulations, and the industry. Always goes the extra mile to help out! 5*

Karim Meraga

Still unsure?

We offer free phone call and email support until you’re ready to proceed with us.
Access free support for your project now.

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