Members of

Member of the Federation of Small Businesses

What Our Customers have to Say!

"It appears to have solved a very long nightmare for me and looks not only in keeping with the house but very smart too. If you ever need a letter of reference..." More...

Alu-Rex Gutter Clean System

Alu-Rex Gutter Clean System available with TLG Gutters!

Works the first time... all the time! Available here at TLG Gutter Wales. More...

Click here for a free online quotation!

Common Problems with Concrete Gutters and Finlock Gutters

Differential Thermal Movement and Bridging Cold - TLG Gutter Wales

Problems with leaking gutters in Wales causing damp and cracks?

Call TLG Gutter Wales on 0800 298 0084

TLG Gutter Wales can help you to solve common problems with concrete gutters and finlock gutters. Differential thermal movement is caused by different materials expanding and contracting by different amounts as the temperature changes.

Such differences have caused the gutter sections to move relative to each other so instead of providing a smooth run for water, linings become damaged and water can sit in the gutters which also leads to dampness in the cavity walls and the concrete deteriorates over time.

Thermal Bridging
/ Bridging Cold

Thermal bridging or bridging cold has become a major problem with concrete finlock gutters due to central heating and double glazing being installed in homes. As a result the average temperature inside properties is now higher than in the past.

The bridging cold manifests as a black mark where the ceiling meets the wall, where the wallpaper is coming away at the top, as well as in bathrooms where tiles are dislodged.

In the summer it is not as great a problem but in the winter when the heating is on and the finlock gutters become very cold and moisture in the warm interior air condenses on the wall in the vicinity. This leads to cracking, mould and damage to the decorations.

The problem is caused as follows

  1. The air inside the house will carry more water as the central heating raises its temperature.
  2. The finlock gutters allow cold to cross the cavity and creates a cold strip where the internal wall meets the ceiling.
  3. Condensation forms where the warm air meets the cold surface (on a much reduced scale of a mirror in a bathroom). In bathrooms it is much worse particularly in shower cubicles.


Cutting gutters off does reduce this problem substantially as between the cold and the top of the wall a 22mm wood then a 18mm PVC layer is created.


If you are located in Wales, and are experiencing problems with your gutter system, please click the button below to get a free, online quotation or contact us to talk to our experienced team.

Click here for a free online quotation from TLG Gutter Wales!


Telephone 0800 298 0084 now!

<< Back to top