Temporary Sealing for Air Tightness Test

What is key to ensure air tests with temporary sealing are effectively organised is to contact HRS early to discuss the scope of works.

HRS offer advice to enable a schedule of temporary sealing works which identifies what needs sealing where; the number and size of intakes/extracts/louvres; access required; what materials and equipment are needed and programming the sealing works to coordinate with other site works including commissioning. Failing to adequately plan for temporary sealing usually leads to stress on the day of the air test and failure of the air test.

HRS have teams of temporary sealers with the experience gained on attending and supporting 100’s of air tests on projects nationwide. Most of HRS temporary sealing teams are experienced air sealers as well and can offer smoke testing skills and practical advice on how to carry out remedial sealing.

HRS teams have the relevant training and certification to set up and access scaffold towers, scissor lifts, cherry pickers and where access is particularly difficult rope access. All HRS personnel are provided with body harnesses and lanyards to safely access man safe systems.

HRS teams come equipped with specialist equipment to enable all elements of the building to be quickly and effectively sealed. Equipment can include extendable props, sheet materials – polythene, foil faced boards, COREX, thin plywood and different tapes and glues including low tack variants to avoid damaging finishes.

What other attendance is required when carrying out temporary sealing?
All mechanical ventilation needs to switched off and in some cases isolated and attendance by the installer is normally required.HRS temporary sealing teams normally attend and support during the air test itself and are on hand to strip the temporary sealing after the air test is complete.

What can be temporary sealed for the final air test?

The air test is a pressure test on the thermal envelope of the building, which should be complete. All intentional ventilation openings including H and V ductwork, louvres, trickle vents can be temporarily sealed. All drainage traps should be filled with water.

Smoke vents are not intentional ventilation openings and should NOT be temporarily sealed. Other elements which should not be sealed are all external doors, windows etc. Please note that if they are sealed this will invalidate the air test and the air tester will note these in the air test report.

If you are unsure of the Air Tightness services you require please call 0800 030 4391 or email info@hrsservices.co.uk and one of HRS Air Tightness Consultants would be happy to guide you through the process.

0800 030 4391


Knowledge Hub
“Just wanted to drop an email show appreciation for HRS operatives for the works that they carried out. They very knowledgeable and were able to guide and work with our site team,  in order to achieve satisfactory air tests.”
Project Manager, Kier Construction
“Please pass on my thanks to the air tester for there positive approach and his hands on attitude. Can you please also pass this on to his line manager in his professional attitude. I look forward to being able to use HRS again in the future.”
Quantity Surveyor, Morgan Sindall
“I would like to thank your air tester for his patience during the past tests. He has given me excellent advise which we help on future projects.”
Design Co-ordinator, Balfour Beatty Construction

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Need advice or a quotation give HRS a call on:
0800 030 4391 or email: info@hrsservices.co.uk