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Concrete | Finlock guttering 

How we approach problematic concrete | Finlock guttering 

Leaking concrete | Finlock gutters

What are finlock gutters? 

Concrete or finlock gutters are usually found on properties built between 1950 and 1970.


The system was introduced as a replacement for cast iron or steel rainwater goods following a shortage in metals at the time. 

Concrete was a low cost and readily available alternative resulting in many new build homes of the time being fitted with the finlock system. 

Why are they problematic?

The concrete blocks used to create the finlock system rest across the cavity of the wall and extend externally to create the roofline.


By nature concrete is an absorbent material. If left un-protected finlock blocks can become heavy and move/drop, resulting in joint failure and a 'sagging' in the roofline. 


Movement can occur in any property as it settles or as a result of expansion and constriction. Another common denominator in finlock blocks dropping is lack of sufficient support during window installation. Movement will first become apparent if windows are difficult to open and close. 

As a result the joins between the blocks can fail. Wet external walls  will become apparent as the system fails. Water marks around the external joins in the gutter are usually the first sign of a problem.  

If left unattended to, rainwater can affect the internal walls too, as water seeps into the cavity. 

Leaking Concrete | Finlock Gutters

What are my options? 

There are many companies that offer different methods of dealing with concrete gutters. Gutters4u provide a profiled aluminium lining service. Our bespoke liners are join free and come with a no quibble 20 year guarantee.  Below you will find more information on the features and benefits of our product, as a comparison to other systems on the market. 

Here we will run though the basic options compared to the service we offer. 

Approaching remedial works to finlock gutter systems is not necessarily as costly or drastic a problem as some might lead you to believe.  

Once you have weighed up the pros and cons of each system or company, we recommend dividing the cost of your quotes by the length of the guarantee provided with each. This should aid you in making the decision that is right for you, your budget and your home. 

Aluminium Gutter Lining for Leaking concrete | finlock gutters Chelmsford Essex

If you are interested in a quote simply complete the details below

Rest assured that we won't pester you with pushy sales calls or bombard you with unwanted emails!

We will simply provide a quotation and leave you space and time to decide . 

Contact Us

To help us to provide you with a remote estimate please upload:


  • Images of each elevation of your home that has concrete | finlock gutters.

  • These images are best taken at a distance, to allow us to check access and other anomalies that may affect the installation. 

  • If uploading is not for you, please feel free to send them via text or WhatsApp, along with your name, address and email to: 07852 359 673

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Concrete | finlock guttering Chelmsford Essex

The benefits of aluminium lining

Aluminium lining finlock gutters eliminates many of the pitfalls of the methods mentioned above. 

Our installers can cold press vast lengths of aluminium coil on location to sit neatly within the existing gutter profile. 

The aluminium is cold pressed on site to sit across the length of your roofline.  Multiple properties can also be worked on without the need for a join between. 

Profiled to the exact measurements of your roofline, the liner will sit beneath the last row of roof tiles (**there are some cases whereby this is not possible), within the gutter profile and fold over the top lip of the gutter too - in one piece. The joins sit at the boarder of your property only - greatly reducing possible points of entry. 

Furthermore the aluminium we use will never chip, crack, split, expand or constrict in changing weather conditions. It carries BBA certification and is manufacturer guaranteed for in excess of 30 years when installed in suburban areas and in excess of 20 in industrial and marine conditions. 

The aluminium gauge is between 0.7-0.9mm thick, maximising the volume of water your gutters can hold and eliminating the need for 'layering up' the material. 

We apply a 20 year guarantee on the installation too. This is a promise to return at any point within the 20 year period to replace failing joins, should the need arise. 

We can limit the possible ingress locations to these isolated areas as the aluminium will never fail. Joint replacement is covered under warranty regardless of the condition we find the gutters in on arrival -and is a straight forward fix. 

We do however; charge to unblock gutters that are found to be full, as this falls within maintenance rather than system failure. 

Keeping any roofline clear of debris on at least an annual basis will ensure that the system is working correctly.  This applies to PVC, aluminium, cast iron, steel or lined concrete gutters.

For more information or to check our frequently asked questions please click the button below. 

We Serve

Essex: Brentwood, Billericay, Ingatestone, Chelmsford, Basildon, Colchester, Harlow, Clacton, Frinton on Sea, Walton on Naze, Halstead, Braintree, Maldon, Danbury, Witham, Coggelshaw, Tiptree, Harwich, Southend, Rochford, Waltham Abbey, Saffron Walden, Benfleet, Wickford, Rayleigh, Burham on Crouch, Woodham Ferrers, Hullbridge, Epping, Essex, Theydon Bois, Abridge, Chigwell, Sawbridgeworth, Bishops Stortford, Great Dunmow, Stanstead, Corringham, Stanford le Hope, Canvey, Leigh on Sea,  Westcliffe on Sea,  Shoeburyness, Hawkwell, Hockley, Southminster, Danbury, Ingatestone, Great Baddow, Chipping Ongar, Loughton, Abridge, North Weald Bassett, Thaxted, Sible Hedingham, Silver End, Hatfield Peverel, Kelvedon, Marks Tey, Earls Colne, Brightlingsea, Wivenhoe, Manningtree, Mersea.
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