All you need to know about the costs associated with repointing a chimney including materials, labour and time frames.
The pointing is the finished cement between brick courses on a wall or chimney. The costs to repoint a chimney or wall will ultimately depend on the size of the wall/chimney stack and the height/access. If the pointing is left to decay and crumble over time, this can lead to penetrating damp and ultimately expensive structural problems, so it is best to get any repointing done as soon as possible to avoid further expense down the line.
If you are considering having your chimney repointed, you probably have a leak and are hoping that repointing will solve the problem. However, you should also inspect (and replace if necessary) the chimney pot and flaunching, the lead around the chimney base and tiles around the chimney and under the flashing. If you need scaffold erecting to do the pointing (most houses will), it may be worth considering any other jobs which may need doing in the near future which could make use of the scaffold such as any fascia, soffit or guttering work.
The most difficult part of repointing a chimney is gaining safe access to the chimney and working at height. This will almost always involve hiring a scaffold company to provide safe access. Once you have access you should also inspect the flaunching on top of the chimney and remove/replace if in poor condition. Then the old pointing should be raked out and any loose dust removed with a brush. Do not be tempted to just have a thin layer of cement applied over the top of the old pointing, this is a false economy and will not last, peeling off after just a few months.
For a job to last and stand up to the British weather, it is paramount that the old cement is raked out to around an inch deep or more. Then the new cement can then be pointed into the brick course. Repointing can be done as a DIY project as long as you are comfortable working at height and have the necessary safe access using a scaffold or access tower. No planning permission is required.
Things can always go wrong when working at height, increasing the cost of the job. So ensure any company you hire has the experience and qualifications to do the job properly, and, failing that, they carry adequate insurance cover for any damage or injuries caused! Your location will also affect the price as labour costs differ considerably across the North/South divide!
The average cost to repoint a chimney is typically around £300 for a small chimney with easy access on a low roof. A chimney on the gable end of a semi-detached house is expected to cost £800 due to scaffolding costs. Repointing a large chimney stack in the centre of a roof is the most expensive, typically around £1200. This average price can vary greatly depending on location, amount of scaffolding, type of chimney, and whether the chimney is at the end or middle of the roof, as well as if it's at eaves or ridge height.
A roofer will often charge around £150 per day in labour costs and will likely work in pairs to repoint a chimney due to safety reasons, so expect to pay around £200-£250 for two workers. The time to complete the work will depend on the size of the chimney and where the chimney is located. A small chimney will take up to one day, whereas a larger chimney will take on average 2-3 days.
Below are some estimated costs of hiring a chimney specialist to repoint your chimney:
|Chimney Type||Scaffold Type||Avg. Cost||Duration|
|Chimney on a Bungalow||None||£250||1-2 days|
|Chimney on the side of a Semi-Detached House||Scaffold Tower||£600||2 days|
|Chimney in the middle of a Semi-Detached House||Scaffold over Ridge||£1000||2-3 days|
Individual costs for hiring a roofer to repoint a chimney on the gable side of a semi-detached house - Total Cost: £600