Electronic High-Tech leak detection for flat roofs

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Flat roof leak detection kitLeaks in flat roofs are often difficult to find using traditional methods. Holes in flat roofs are often too small to be identified visually, but these holes can cause significant water damage to your home. Because it is so hard to find these leaks, they typically run for several weeks before being found and fixed. Our high-tech electronic system finds holes and leaks in flat roofs by passing a low level charge through the roof membrane, and identifying where it earths out through each hole and leak. The system finds holes and leaks on both the horizontal flat surface, and upstands where the membrane dresses up the wall. This is crucial as many leaks are found where membranes are folded into corners. The system works on the following flat roof surfaces:-

  • Single ply PVC membranes (not EPDM)
  • Built up bitumen felt
  • Liquid or painted on membranes
  • Hot melt
  • Asphalt

If you are in doubt about your flat roof construction, please call our office to discuss.

Typical applications include flat roofs, balconies, and bay windows. Commercial applications include car park roofs, and bridge decking.

Our leak detection service requires access to the underside of the roof. This normally involves removing a small section of the water damaged ceiling plasterboard.

Our service requires the roof to be tested must be dry, so it is weather dependent. We aim to book after a 24 hour period forecasted to be dry by bbc.co.uk/weather. Testing normally starts at 9.30AM. The equipment can test up to 1500 – 2000 m2 per day, so all testing should be completed same day. The cost of testing starts at £395 plus VAT, but please call our office to discuss.

We require safe access to the roof,  and safe working on the roof, so we will need to ask you about its size, pitch, height off ground, etc.

All holes and leaks are marked for your roofer to attend and permanently repair. Alternatively we can recommend a local roofer.

We have been detecting leaks since 2010. Our customer feedback has a 98.2% rating of ‘Excellent’. Please see our testimonial page for specific comments.


Flat Roof Leak Detection Terms & Conditions

Date: 27th March 2018

  1. Site Access & Permissions

1a. Due to the size and weight of equipment we use, we require free and available parking within 100 meters of the property subject to the leak detection service. Parking permits should be provided where necessary. If free and available parking is not available within 100 meters of the property, and/or permits cannot be provided, then any parking fees or fines incurred by our company will be payable at cost.

1b. It is the client’s responsibility to arrange good access to all necessary areas, including other properties if required. If adequate access is not arranged and testing cannot be carried out or completed, then our standard charges will be payable. Any return visit(s) required will also be payable.

1c. We will use best endeavours to work around limited access. However, if areas are restricted or we are refused necessary access, this may result in our engineer being unable to conclude their work and our standard fees will be payable.

1d. If at any time our engineer receives client refusal to our proposed testing methods, and we are unable to continue, then our standard fees will be payable.

  1. Leak Detection

2a. We require safe access on to the roof, and for the roof construction to be sound and stable. We cannot test any unsafe roof constructions. If any part of the roof is thought to be unstable or unsound in any way we must be advised before testing. If any part of the roof is not flat, then we will need to know the pitch. We also need to know other details such as the presence of obstructions, trip hazards, exposed services, and the like. It is your responsibility to ensure the information you give us at the time of booking is correct. This information will be confirmed back to you in a ‘booking confirmation’ email. It is your responsibility to check the information in this email is correct. If when we attend we find the flat roof membrane cannot be tested, our standard cancelation charges will apply (please see section 3b).

2b. We cannot test any flat roof membrane which is conductive, especially EPDM (if in doubt a roofer should be asked to inspect and report prior to our attendance). It is your responsibility to ensure the information you give us at the time of booking, regarding the type of membrane, is correct. This information will be confirmed back to you in a ‘booking confirmation’ email. It is your responsibility to check the information in this email is correct. If when we attend we find the flat roof membrane cannot be tested, our standard cancelation charges will apply (please see section 3b).

2c. If there is no conductive material below the flat roof membrane, then we can only successfully test for leaks if there is a moisture path through the membrane into the roof construction and ceiling below. This normally appears as internal water damage and water staining. We will ask you about this at the time of booking. This information will be confirmed back to you in a ‘booking confirmation’ email. It is your responsibility to check the information in this email is correct. If when we attend we find the flat roof membrane cannot be tested, our standard cancelation charges will apply (please see section 3b).

2d. The flat roof membrane to be tested must be dry. Bookings will be made on the basis of a bbc.co.uk/weather forecast for the leak detection site address. The forecast must show the day preceding the test to be dry from 8.00am onwards. The test day must also be forecasted to be dry throughout the day until 4.30PM. Limited amounts of residual standing water and moisture can be removed manually on the test day.

2e. It is not possible to predict how long it will take to find any leak(s).

2f. We will attempt to find all leaks within the client brief given to us, but no guarantee is possible as to how long this will take, and how many return visits are necessary.

2g. If undetected leaks cause any damage between our visits, then we accept no responsibility for such damage.

2h. We are not responsible for leaks in areas not included in the client brief.

2i. Using specialist equipment we will try to locate a leak to a specific area. Although our methods are more accurate and preferable to the traditional approach, there are limitations to these methods.

2j. Leaks can be intermittent, i.e. only leak under certain circumstance. Leaks of this nature can be much harder to locate and it may not be possible to locate a leak of this type.

2k. Leak detection is considered successful even when we find no leak is present.

2l. There are limits to what leak detection technology can provide and every effort is made to ensure the accuracy and reliability of our findings and reports. Information is presented as we find it, with no warranty as to accuracy, and is intended for guidance only. The Leak Detection Company Ltd cannot be held responsible for the way in which the client may interpret or act upon the results of the report.

2m. It is the client’s responsibility to continue to monitor the situation after we have left, and call us back as necessary to investigate any on-going leak.

  1. Cancellation

3a. Unless notice of cancellation is provided in writing to admin@theleakdetectioncompany.co.uk at least 2 full working days prior to the booking date and time then a cancellation fee of £250.00 plus VAT would be payable.

3b. If we are unable to make access at the agreed date and time, then an overhead recovery fee of £300.00 plus VAT would be payable.

3c. Deposits are non-refundable, unless notice of cancellation is provided in writing to admin@theleakdetectioncompany.co.uk at least 72 hours prior to the booking date and time. If the deposit is refundable, then a refund will be processed via the payment method less a £75.00 plus VAT handling fee.

  1. Payment

4a. Payment is due on the day of the leak detection and will be taken by our engineer before they leave site. We accept debit/credit card, cash, or cheque (made payable to The Leak Detection Company Ltd). If you are not on site at the time of completion then payment will be taken over the phone by card. If we are unable to reach you for any reason an invoice will be sent by email and payment is strictly due by return.

4b. Any overdue payments will automatically be passed to a debt collection agency. We reserve the right to add interest charges at an annual rate of 12.0%. We also reserve the right to charge recovery fees.

4c. We do not accept payment from insurance companies.

4d. Materials remain the property of The Leak Detection Company Ltd until our invoice is paid in full.

4e. The report will not be released until payment is due in full.