Terms & Conditions

Terms and Conditions of Service

Website version | Last updated 29 July 2026

 

These terms explain how Airtightness UK Ltd supplies testing, diagnostics, ventilation and related building-performance services.

Please read these terms with your quotation

Your accepted quotation, written scope, booking confirmation, purchase order and any separately signed agreement form part of the contract. If there is a conflict, a separately signed agreement takes priority, followed by the accepted quotation or scope, the purchase order (to the extent we accepted it), and then these terms.

 

Company

Airtightness UK Ltd

Registration

Company No. 15246570 | VAT No. 458888515

Registered office

Suite 4, 109A Hamilton Road, Felixstowe, Suffolk IP11 7BL

Contact

0330 043 8801 | www.airtightness.uk

1. When these terms apply

These terms apply whenever you ask us to provide services and we accept the instruction. “You” and “the client” mean the person or organisation that books or pays for the services. “Site” means the property or location where the services are provided.

A contract is formed when you accept our quotation, issue an instruction or purchase order that we accept, confirm a booking, or allow us to start work. By doing so, you confirm that you have authority to engage us and accept these terms.

2. Our services and scope

We provide airtightness testing, air-leakage diagnostics, smoke testing, thermal imaging, ventilation testing, installation, commissioning and improvement works, Part F and background ventilation testing, consultancy and compliance reporting, together with other services stated in our quotation.

Our obligation is limited to the work expressly included in the accepted quotation or written scope. A test, inspection or diagnostic visit is not a comprehensive building survey. Unless expressly agreed, our advice is not structural design, engineering certification, building-control approval or a guarantee that the property will achieve a particular performance target.

Electrical work beyond testing or inspection, structural alterations, fire stopping, asbestos work, extensive decoration or making good, specialist access equipment and other unquoted work are excluded unless specifically included.

3. Quotations, bookings and programme

Unless stated otherwise, quotations are valid for 30 days. Prices exclude VAT and exclude parking, congestion charges, permits, specialist access or equipment and additional work unless the quotation says they are included.

Please give at least 10 working days’ notice where possible. Dates and times are estimates until confirmed and may be affected by access, traffic, weather, site conditions, preceding works and events outside our reasonable control.

We may correct obvious clerical or pricing errors before the services are provided. Any client purchase-order terms apply only where we have expressly accepted them in writing.

4. Your responsibilities and site readiness

You must give us accurate information about the property, intended test or service, construction stage, occupancy, known hazards and access arrangements. You are responsible for ensuring the site is safe, legally accessible and ready at the agreed time.

Before an airtightness or ventilation visit, you must complete and follow our pre-test checklist and ensure, as applicable:

windows, external doors, hatches, service penetrations and relevant building systems are installed and in the required test condition;

safe, unobstructed access is available to all areas, including plant, roof spaces and test openings;

a suitable 240V or 110V power supply is available as agreed at booking;

water is present in sinks, wastes and traps so that drainage seals are effective;

works that could affect the result have stopped and relevant trades, occupants, residents and site management have been informed;

parking, permits, keys, inductions and any agreed access equipment are available;

children and pets are kept away from the work area and residents receive any necessary support.

You must tell us before arrival about asbestos, fragile materials, concealed services, contamination, restricted areas, safeguarding requirements or other significant risks. We may pause or stop work where conditions are unsafe or materially different from the information supplied.

5. Standards, testing and certification

We will use reasonable skill and care and provide appropriately competent personnel and calibrated equipment. Airtightness testing is carried out in line with applicable Building Regulations, Elmhurst Energy requirements, CIBSE TM23 (or relevant successor guidance) and the method appropriate to the building type and agreed purpose of the test.

Ventilation and background-ventilation work will follow the applicable regulations, manufacturer requirements and recognised industry procedures. Where the scope refers to a scheme or approved process, that process will apply to the relevant service only.

A test result records the condition of the property at the time of testing. Later work, changes in use, open or closed components, weather and system settings may change performance. We do not guarantee a pass or target result unless a specific performance commitment is expressly agreed in writing.

Reports and certificates are issued after the necessary checks and data processing, and may be subject to scheme oversight or audit. We may retain test records, site evidence and calibration information and make them available to Elmhurst Energy or another applicable auditor where required.

6. Changes and additional work

If the scope, property information, test method, access requirements or site condition changes, we may revise the price and programme. We will seek your approval before carrying out chargeable additional work where reasonably practicable.

Urgent steps needed to make the area safe, protect equipment or prevent damage may be taken without prior approval where delay would create a material risk. We will explain the reason and any charge as soon as practicable.

7. Cancellations, delays and abortive visits

Please tell us promptly if a booking needs to change. A cancellation or postponement made less than 48 hours before the agreed arrival time may be charged, together with any non-refundable travel, accommodation, parking, hire or third-party cost already committed.

We may charge for waiting time, an abortive visit and a return visit where we cannot start or complete the work because the site is not ready, access is unavailable, utilities or agreed equipment are missing, conditions are unsafe, occupants or site management refuse access, or relevant installations are incomplete or incorrectly configured.

We are not liable for delay caused by circumstances outside our reasonable control. We will rearrange affected work as soon as reasonably possible.

8. Charges and payment

Invoices are payable within 30 days of the invoice date unless the accepted quotation or invoice states a different period. VAT is charged at the applicable rate. Minimum charges, travel charges, retest fees and agreed expenses apply where stated in the quotation.

If an invoice is overdue, we may charge statutory interest, compensation and reasonable recovery costs under the Late Payment of Commercial Debts (Interest) Act 1998. We may also suspend further work and withhold reports or certificates until overdue sums are paid.

Retention is not accepted unless agreed by us in writing before the contract is formed. Any query about an invoice must be raised in writing within 7 days of its date, identifying the amount and reason disputed. Undisputed sums remain payable.

9. Reports, certificates and intellectual property

Reports and certificates are prepared for the client and the stated property and purpose. They may not be altered, presented out of context or reused for another property, construction stage or commercial purpose without our written consent.

We retain copyright and other intellectual-property rights in our templates, methods, reports, photographs and supporting material. Once all relevant invoices are paid, you may use the final report or certificate for the purpose for which it was commissioned and share it with the property owner, project team, building-control body, energy assessor, scheme administrator or other person reasonably connected with that purpose.

10. Liability

We will perform the services with reasonable skill and care. We are not responsible for latent defects, concealed services, inaccurate information supplied by others, work carried out by third parties, or defects and non-compliances outside the agreed scope.

To the fullest extent permitted by law, we are not liable for indirect or consequential loss, loss of profit, loss of opportunity, loss of rent, delay costs or third-party claims arising from a matter outside our agreed scope. Our total liability arising from the services is limited to the fees paid for the service giving rise to the claim.

Nothing in these terms excludes or limits liability for death or personal injury caused by negligence, fraud or fraudulent misrepresentation, or any other liability that cannot lawfully be excluded or limited.

11. Data protection, confidentiality and photography

We process personal data in accordance with UK data-protection law, including the UK GDPR and Data Protection Act 2018, and our privacy information. We may share relevant information with laboratories, software providers, certification or scheme bodies, assessors, auditors, building-control bodies and other service providers where this is necessary to deliver, verify or administer the services.

We may take photographs or video to record site condition, test setup, defects, readings, completed work, quality assurance or a dispute. We will not use identifiable property images for public marketing without permission.

Each party must keep the other’s confidential information secure, except where disclosure is required to perform the contract, meet a professional or scheme obligation, comply with law or enforce legal rights.

12. Complaints and disputes

If you are dissatisfied, contact us promptly in writing and include the property address, quotation or invoice reference, a clear description of the issue, supporting photographs or documents and the outcome sought.

You must give us a reasonable opportunity to inspect and, where appropriate, remedy an alleged defect before appointing another contractor to carry out remedial work. This does not affect any mandatory consumer rights.

We will try to resolve complaints fairly and may propose independent mediation or another suitable form of alternative dispute resolution. These terms and the contract are governed by the law of England and Wales, and the courts of England and Wales have jurisdiction.

13. General

If part of these terms is found unenforceable, the remaining provisions continue in force. A delay in enforcing a right is not a waiver. No person other than the client and Airtightness UK Ltd has a right to enforce the contract under the Contracts (Rights of Third Parties) Act 1999.

The version in force when the contract is formed applies to that booking. We may update the website version from time to time, but an update will not change an existing contract unless both parties agree in writing.

Questions about these terms?

Call 0330 043 8801 or visit www.airtightness.uk before confirming your booking.

Airtightness UK Ltd • Company No. 15246570 • VAT No. 458888515