Soak test
A soak test is a process used to evaluate the performance of construction materials, systems, or components by exposing them to prolonged periods of water or moisture to simulate real-world conditions. This test is particularly relevant for ensuring the durability, waterproofing, and weather resistance of materials used in buildings and infrastructure.
Materials or systems are exposed to water for an extended period, typically hours or days, depending on the expected conditions. This simulates real-world scenarios such as heavy rainfall, standing water, or high humidity. Observations focus on water ingress, structural degradation, material swelling, or failure of waterproofing elements.
- It confirms that materials can endure prolonged exposure to moisture without deteriorating.
- Verifies adherence to building regulations and performance standards, especially regarding water resistance and weatherproofing.
- Detects potential flaws or vulnerabilities before construction progresses further.
- Reduces the risk of water damage, mold growth, or structural failures in the completed project.
[edit] Soak tests might be used in:
- Waterproofing and membrane testing to ensure roofing, cladding, or foundation membranes can withstand prolonged exposure to water without leaking or degrading.
- Permeability testing, applied to porous materials like concrete or masonry to determine the rate at which water can penetrate or pass through.
- Drainage system testing to verify the capacity and functionality of drainage systems under sustained water loads.
- Groundwater and soil testing to assess soil absorption and drainage characteristics, particularly for sustainable drainage systems (SuDS) or soakaways.
- Cladding and facade systems to tests the ability of external cladding systems to resist water ingress under prolonged rain or humidity exposure.
[edit] Related articles on Designing Buildings
- Airtightness testing.
- Construction materials.
- Construction tolerances.
- Durability.
- Fit for purpose.
- In-situ reinforcement of timber beams.
- Insitu testing of soils.
- Manufacturer’s certificate.
- Opening up works for inspection and testing.
- Predicting service life of timber structures.
- Quality control.
- Testing construction materials.
Featured articles and news
Key points for construction at a glance with industry reactions.
Functionality, visibility and sustainability
The simpler approach to specification.
Architects, architecture, buildings, and inspiration in film
The close ties between makers and the movies, with our long list of suggested viewing.
SELECT three-point plan for action issued to MSPs
Call for Scottish regulation, green skills and recognition of electrotechnical industry as part of a manifesto for Scottish Parliamentary elections.
UCEM becomes the University of the Built Environment
Major milestone in its 106-year history, follows recent merger with London School of Architecture (LSE).
Professional practical experience for Architects in training
The long process to transform the nature of education and professional practical experience in the Architecture profession following recent reports.
A people-first approach to retrofit
Moving away from the destructive paradigm of fabric-first.
International Electrician Day, 10 June 2025
Celebrating the role of electrical engineers from André-Marie Amperè, today and for the future.
New guide for clients launched at Houses of Parliament
'There has never been a more important time for clients to step up and ...ask the right questions'
The impact of recycled slate tiles
Innovation across the decades.
EPC changes for existing buildings
Changes and their context as the new RdSAP methodology comes into use from 15 June.
Skills England publishes Sector skills needs assessments
Priority areas relating to the built environment highlighted and described in brief.
BSRIA HVAC Market Watch - May 2025 Edition
Heat Pump Market Outlook: Policy, Performance & Refrigerant Trends for 2025–2028.
Committing to EDI in construction with CIOB
Built Environment professional bodies deepen commitment to EDI with two new signatories: CIAT and CICES.
Government Grenfell progress report at a glance
Line by line recomendation overview, with links to more details.
An engaging and lively review of his professional life.
Sustainable heating for listed buildings
A problem that needs to be approached intelligently.
50th Golden anniversary ECA Edmundson apprentice award
Deadline for entries has been extended to Friday 27 June, so don't miss out!
CIAT at the London Festival of Architecture
Designing for Everyone: Breaking Barriers in Inclusive Architecture.
Mixed reactions to apprenticeship and skills reform 2025
A 'welcome shift' for some and a 'backwards step' for others.