We provide Air Pressure Testing for developers, housebuilders, contractors, architects and construction professionals, helping project teams identify air leakage, verify the quality of the building envelope and provide the test results required for Building Regulations compliance.
Air Pressure Testing, also known as air permeability testing or air tightness testing, measures the amount of air that escapes through unintended gaps and openings in a building’s envelope.
During the test, the building is temporarily pressurised and depressurised using a calibrated fan. The resulting air flow is measured to determine the building’s air permeability.
The test can identify air leakage around areas such as windows, doors and frames, junctions between walls, floors and roofs, service penetrations and openings, Seals, joints and other gaps in the building fabric.
The result is expressed as an air permeability rate in m³/(h·m²) at 50 Pa and can be compared against the applicable design and Building Regulations requirements.
Uncontrolled air leakage can increase heat loss and affect the energy performance of a building. Testing provides a way to check whether the completed building is performing as expected.
Air Pressure Testing can help you:
• Demonstrate compliance with Building Regulations Part L
• Identify unwanted air leakage before the project is completed
• Verify the quality of the building envelope and construction
• Confirm that the completed building performs in line with the energy assessment
• Avoid delays caused by failing to meet the required air permeability standard
We work with architects, developers, contractors, housebuilders and construction professionals, providing design and build compliance services across residential and commercial projects.
From SAP Calculations and SBEM Assessments to air pressure testing, acoustic testing, ventilation and thermal performance assessments, we provide the technical compliance services your project needs at different stages of design and construction.
With one company and one point of contact, we make it easier to manage multiple compliance requirements from design through to completion, helping your project stay on track and meet applicable Building Regulations.
Our air pressure testing is carried out with reference to:
• Building Regulations 2010 – Part L
• Approved Document L, Volume 1: Dwellings
• Approved Document L, Volume 2: Buildings other than dwellings
• BS EN ISO 9972
Whether you require a Air Pressure Testing on its own or alongside other compliance services, we’ll help coordinate the process through one trusted provider, making property compliance simpler to manage.
Our competent surveyors carry out Air Pressure Testing across a wide range of commercial and residential properties, ensuring each survey is appropriate for the building and its intended use.
Based in Manchester with a particular focus on Greater Manchester and the wider North West. But our team supports clients across the UK, so wherever your properties are located, we’re ready to help.
Our compliance reports are written in plain English, with clear findings, practical recommendations and documentation that’s ready to use. No unnecessary jargon, just reports that help you act quickly and stay compliant.
From your first enquiry to your final report and beyond, we’re committed to clear communication, prompt responses and proactive recommendations and reminders to help you stay compliant without the stress.
We coordinate your compliance services in one place, reducing administration, saving time and making property compliance easier to manage, so you can focus on supporting your residents.
Working with the Compliance Company is always great, they produce their work in a timely and professional manner.
Communication is always top notch too, which is really appreciated. They are our go to consultants for anything Part L or SBEM related.
Very happy with their prompt noise survey and report. All done smoothly and within the timescales communicated during quotation. Highly recommended!
Ryan was exceedingly helpful. A wealth of guidance, advice, and wisdom. Very personable, professional, and honest. He answered all my questions promptly and thoroughly.
It’s very refreshing when you don’t have to chase people! Really cannot recommend Ryan enough. He and his business are top-notch
We provide Air Pressure Testing across the UK, supporting commercial property owners, landlords, housing providers, managing agents, contractors and organisations responsible for maintaining safe, compliant buildings.
Our surveyors regularly work across:
• Greater Manchester (Manchester, Salford, Bolton, Stockport, Oldham, Rochdale, Bury, Tameside, Trafford, Wigan)
• Merseyside (Liverpool, Wirral, St Helens, Southport, Knowsley, Sefton)
• Cheshire (Chester, Warrington, Crewe, Macclesfield, Northwich, Ellesmere Port, Wilmslow)
• Lancashire (Preston, Blackburn, Blackpool, Burnley, Accrington, Rossendale, Chorley, Lancaster)
• West Yorkshire (Leeds, Bradford, Wakefield, Huddersfield, Halifax, Dewsbury, Batley)
• South Yorkshire (Sheffield, Doncaster, Rotherham, Barnsley)
• North Yorkshire (York, Harrogate, Scarborough, Ripon, Selby, Skipton)
• East Midlands (Derby, Nottingham, Leicester, Derbyshire, Nottinghamshire, Leicestershire)
• Staffordshire (Stoke-on-Trent, Stafford, Tamworth, Newcastle-under-Lyme, Burton upon Trent)
• West Midlands (Birmingham, Coventry, Wolverhampton, Solihull, Walsall, Dudley, Sandwell)
• North East (Newcastle, Sunderland, Gateshead, Middlesbrough, Darlington, Durham)
• East Anglia (Cambridge, Norwich, Ipswich, Peterborough)
• Greater London (Central, North, South, East, West London)
• Kent (Maidstone, Canterbury, Medway, Ashford, Dartford, Tunbridge Wells)
• Surrey (Guildford, Woking, Reigate, Epsom, Redhill)
• Essex (Chelmsford, Colchester, Basildon, Southend-on-Sea, Harlow)
• South Coast (Hampshire, Sussex, Portsmouth, Southampton, Brighton, Eastbourne)
• South West (Bristol, Devon, Cornwall, Somerset, Gloucestershire, Plymouth, Exeter, Bath, Gloucester, Cheltenham, Taunton)
• South Wales (Cardiff, Newport, Swansea, Bridgend, Merthyr Tydfil)
• Scotland (Glasgow, Edinburgh, Aberdeen, Dundee, Stirling, Perth)
For new dwellings, an air pressure test is required as part of demonstrating compliance with the energy-efficiency requirements of Building Regulations Part L.
For new buildings other than dwellings, pressure testing is also generally required under Part L, although specific exemptions can apply. The applicable requirements depend on the building and the regulatory standard applying to the project.
Testing should be carried out when the building envelope is sufficiently complete to allow a meaningful measurement, but while there is still an opportunity to identify and rectify air leakage.
For new dwellings, a preliminary test during construction can also be useful for identifying air leakage before the final test.
If you’re planning a new project, we also provide SAP Calculations and Bespoke PSI Value Calculations during the design stage, helping coordinate your Part L requirements from design through to construction.
If the building does not achieve the required air permeability, areas of significant air leakage should be identified and remedial work carried out. The building can then be retested to confirm whether the required performance has been achieved.
If you need both testing and wider Part L support, we can coordinate your Air Pressure Testing, SAP Calculations and related compliance services through one point of contact.
Common sources include windows and doors, service penetrations, junctions between building elements, floor and roof junctions, seals and gaps in the building envelope.
The required air permeability depends on the type of building, its design and the applicable Building Regulations requirements. The target should be established during the design stage and reflected in the relevant energy assessment.
If you’re unsure what air permeability target applies to your project, our team can provide guidance on the requirements and testing process. Get in touch with us to discuss your project
Yes. We provide a range of design and build compliance services, including SAP Calculations, SBEM Assessments, Bespoke PSI Value Calculations, Air Pressure Testing and EPCs.
This allows us to support projects from design-stage calculations through to on-site testing and completion.
New homes need to demonstrate compliance with the energy efficiency requirements of Part L of the Building Regulations. SAP calculations assess the energy performance of a dwelling and help determine whether the proposed design meets the required standards.
We provide SAP calculations for new-build and conversion projects, assessing energy performance, carbon emissions and key building specifications, and provide the reports needed for Building Control and compliance.
Non-domestic buildings need to demonstrate compliance with the energy efficiency requirements of Part L of the Building Regulations. SBEM assesses the energy performance of buildings such as offices, retail units and commercial spaces against the required standards.
We provide SBEM assessments for new-build and commercial projects, modelling energy performance, carbon emissions and building specifications, and providing the reports needed for Building Control and compliance.
Overheating can affect comfort, health and the performance of new homes. Under Part O of the Building Regulations, new residential buildings must be designed to reduce the risk of overheating and provide adequate means of removing excess heat.
We carry out Part O overheating assessments using the Simplified Method or Dynamic Thermal Modelling, providing clear results and compliance documentation for your project.
Whether you’re managing a residential property, supported accommodation, office, school or commercial premises, an EPC provides an A–G energy efficiency rating and recommendations for improvement.
EPC requirements apply to many properties when they are constructed, sold or rented, with Minimum Energy Efficiency Standards (MEES) also applying to certain rented properties.
We carry out EPC assessments and provide the certification and information you need to understand your property’s energy performance and meet applicable requirements.
Energy performance needs to be considered early in the design process, particularly where planning requirements call for a clear strategy for reducing energy use and carbon emissions.
We prepare energy statements for residential and commercial developments, assessing energy demand, efficiency measures and low-carbon technologies to demonstrate how a project meets its energy and sustainability targets.
New homes need to demonstrate that their water use meets the requirements of Part G of the Building Regulations. Our water efficiency calculations assess the proposed fittings and appliances against the required litres-per-person-per-day target.
We calculate water consumption for new dwellings, helping you meet the required 125-litre or optional 110-litre standard and providing the documentation needed for Building Control.
Default thermal bridging values can be conservative, potentially leading to higher insulation requirements and unnecessary costs. Bespoke PSI values provide a more accurate picture of how heat moves through your building’s junctions and support compliance with Part L of the Building Regulations.
We calculate bespoke thermal bridging values for your project, helping improve SAP accuracy, optimise your specification and demonstrate compliance without over-specifying materials.
Poor sound insulation can affect comfort, privacy and compliance in residential developments. Under Part E of the Building Regulations, buildings must provide appropriate resistance to the passage of sound.
We carry out airborne and impact sound testing to assess acoustic performance, identify issues and provide the test results and reporting needed for building control.
Is the ventilation system actually delivering the airflow it was designed for? Our testing checks MEV, MVHR and other mechanical ventilation systems at individual terminals, helping identify performance issues before they hold up sign-off.
We provide accurate flow-rate results and the certification needed to demonstrate compliance with Part F of the Building Regulations.
Compliance in supported housing is a different beast.
It has stricter frameworks, sector-specific requirements and a very different set of responsibilities.
We have a specialist division built entirely for it. Same one-stop-shop approach, built specifically for housing providers, care organisations and nominated individuals managing property compliance.
