Chimneys and Leadwork
Chimneys are a feature on any house roof and serve an important purpose, to vent the products of combustion from the home. They make sure you and your family are not breathing in the toxic air created by the heating system in the home. It is therefore very important to ensure your chimney and lead work around the chimney are done correctly within the health and safety guidelines.
We at NL Roofing Services have been fitting chimneys and repairing lead flashings for many years so we are proficient in it.
For all your chimney and lead work requirements in North London call us to schedule an appointment or fill out the contact form.
Different types of chimneys
Masonry chimneys. These are made from brick, stone and mortar, or blocks and are the most common type of chimney for homes. A chimney liner is used to support and protect your chimney
Metal chimneys. These are prefabricated chimneys mostly used in commercial buildings but becoming increasingly popular with contemporary home designs. They are double or triple walled and can be encased within the stone or wooden frames.
Does a chimney need a lead tray?
Chimney stacks are exposed to the elements more than any other part of the house and therefore are exposed to the most rainfall. As a result, moisture can permeate the brick layer and seep down the chimney stack into the chimney breast which can lead to damp and other water damage. To prevent this an impermeable layer or lead tray is used at the base where the chimney meets the roof and between the layers of the brick stack, one or two layers of this lead tray are used to ensure there is no unprotected area.
We would say a chimney most certainly does need at least one lead tray to protect against water damage.
How much does it cost to replace lead flashing on a chimney in the UK?
Lead is used in many parts of a building and one of the more important places it is used is on the roof, where the chimney meets the roof and around the chimney as well as where the roof tiles meet the wall. Lead flashings can be expensive and need to be installed by trained professionals, however, if the quality of the lead flashing and the quality of the installation is good then the flashing should last a lifetime.
The lead is extremely durable and therefore it has a very long life, if however the installation was done incorrectly it could cause the lead flashing to become loose which will leave gaps for water to get through causing damage to the chimney and your home.
When repairing or replacing the lead flashings there will more likely than not be a need to remove and replace some roof tiles so it's a good idea to get an inspection of the entire roof done at the same time to check for any other broken or loose tiles which can be fixed.
The average cost of replacing lead flashings around a chimney is between £400-£900 depending on the position of your chimney, whether you have a 2 or 3 storey house, the cost of scaffolding. Labour costs can vary between £200-£400 per day depending on the extent of repairs needed and the height of the building.
If the cheaper, thinner lead is used you could save on the total cost, however, the lead would probably need replacing sooner as it would start splitting sooner than the thicker lead. If you’re looking for a temporary solution then the thinner cheaper lead will do the job but if you want a permanent solution then we’d suggest a thicker, better quality lead to ensure durability and longevity.