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Richmond: 108-110 TW9 1UR,
Sheen Road, Richmond, UK.
Mayfair: 17 Hanover Square,
Mayfair, London W1S 1HU, UK.

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44 203 488 2049

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Our work carries a guarantee from invoices made after January 2020 which is valid for 1 year from the date of the work completed. Your invoice is your reference for your guarantee.

Full terms and conditions regarding your guarantee, are clearly stated on the back of our invoices and on the website.

Our work is covered by a year guarantee against faulty workmanship.

Materials supplied by 11th Hour will be covered by manufacturers’ warranties.

The manufacturer’s warranty for the boilers ranges from 1-7 years depending on the make of the boiler.

We are covered by 5 million indemnity insurance for your peace of mind.

Some work/repairs that have been carried out may not be able to be guaranteed and will be marked on your invoice in the non-guaranteed box.