"Offering fast solutions to your guttering problems"


Finlock Guttering

Do you have concrete gutters installed to your property? If you do, these are likely to be 'Finlock' gutters. They are commonly found in houses built during between 1950 and 1970. Traditionally these gutters had an Aluminium foil and hot bitumastic liner, but this method proved to be a short term measure as over time the Finlock concrete blocks become porous and the joints start leaking, staining the exterior walls and causing damp inside the property.

The concrete units span the cavity and also provide a gutter profile. In some installations, they are formed into a lintel over the windows by inserting steel bars into the lintel trough and filling it with concrete.

Here at Cotswold Rainwater Services we specialise in the installation of an Aluminium liners to the Finlock gutters throughout England, including Oxford, Reading, Cheltenham, High Wycombe and all surrounding towns and cities.

As a finishing touch, we can decorate the exterior of the Finlock concrete gutter blocks using proprietary masonry paint in a colour of your choice. We can also renew the existing downpipes using either uPVC or Aluminium downpipes transforming the appearance of your property!

Our Range of Fascia Products Include:

  • The liners are produced from mill finished Aluminium coil formed on site to the internal profile of the existing concrete block before being laid in continuous lengths.
  • New roofing felt is sleeved under the existing felt and dressed over the aluminium liner
  • Any corner joints are mitres, riveted and sealed to prevent the ingress of water
  • Outlets are formed into the liner and uPVC leaf traps are inserted through the liner to connect to the downpipes
  • Soil vent pipes protruding through the gutter are cut off below the Finlock concrete blocks and re-routed around the outside of the gutter
  • All corner joints and outlets are sealed using a Low Modulas sealant

For the DIY enthusiast or any self build project, we can provide a 'Run-Out' service for the Aluminium liners and offer technical expertise to help you with your installation.

At Cotswold Rainwater Services we are proud to offer an option to cut off the Finlock concrete gutters and replace them with a conventional fascia board and guttering system.

A Swish uPVC fascia board together with a Seamless Aluminium Gutter will provide a maintenance free system.

Finlock Concrete Guttering testimonial

"Thank you for doing this work so neatly and efficiently."

Mr. C

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A wealth of experience

Our dedicated installation team have undertaken various training courses to ensure work is carried out to the very highest standards.

  • CSCS working at height health and safety
  • IPAF
  • Category B unlicensed asbestos
  • Emergency first aid
  • Regular in house tool box talks
  • SSSTS (Site supervisor safety training scheme)
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Cotswold Rainwater News

Head Office

  • The Old Berkshire Hunt,
  • Oxford Road,
  • Kingston Bagpuize,
  • Oxon,
  • OX13 5AP


  • tel: 01865 821 096
  • sales@cotswoldrainwater.co.uk