Select Page

Roof Valley Repair and Replacement Costs

Material Costs, Labour Fees and Time Frame Estimates for Roof Valley Repair and Replacement

A roof valley is that spot where sloping roofs meet. This is the part that channels rainwater downwards and to the gutter. Whenever there is heavy rainfall, roof valleys deal with considerable amounts of water. This makes these spots extremely prone to leaks. It’s common for roof valleys to be made of fibreglass, lead or concrete tiles. How they are repaired will be dependent on materials used for their construction. The process could involve some minor repairs or a total replacement.

After it is established that your roof valley has indeed been damaged, start by having the shingles and tiles moved from the valley. This will make it easier for you to get to the valley flashing and then remove it. Be sure to just lift the necessary tiles needed to take the flashing off the roof.

Once done, fit the replacement flashing in carefully over the two roof’s connection and use concrete or mechanical fixings to put it in place. If you’re using waterproof adhesive or cement for the installation, allow the flashing to dry first before refitting or replacing the roof tiles. Make sure to replace damaged tiles with new ones and dispose of the damaged ones appropriately.

It’s advised that full inspection be performed on your roof flashing, roof tiles, soffits, fascia, chimneys as well as the guttering while work is being done on your roof. This will help you save considerably on labour costs especially since it is the costliest part of any quote.

If there are issues with any part of your roof, it’s practical to get these problems patched and fixed as well. Also, it’s expected that tiles might get damaged or broken during the repair process. So, it’s advised that you should have some spare ready before getting the project started.

In most cases, getting the roof valley and the cement overhauled is the best choice. However, there are instances when the roof valley may still be in excellent condition with only the cement crumbling and in a sorry state. For instances like these, it is better to just get the tiles re-bed onto the new cement, this means just leaving the valley as is.

However, if you have concrete tiles for a base, getting it completely replaced may be necessary as it can be impossible to get concrete tiles repaired due to their tendency to leak.  

If getting the valley replaced entirely, all tiles will need to be removed, along with the removal of the cement as well as the underfelt as it is most likely going to be rotten anyway. Also, if there’s a bad leak is coming out of the problematic roof valley and the leak has stained the ceiling underneath, replacement is necessary before the structure gets completely damaged.

It is possible to repair lead valleys too, which is a good thing as disposing of them wouldn’t be too easy due to their toxic nature.  

As with jobs that involve the removal of roof tiles, you might end up damaging or breaking some in the process. This is why having spare tiles on hand is always recommended.

Where costs go, this shouldn’t be a problem as most tiles aren’t really expensive. If you have an existing flash valley made of lead and replacement is recommended, make sure to not just throw it away. Remember that lead is known for its toxic nature, so proper disposal is necessary.

Costs for Replacing and Repairing a Roof Valley

If you’re only replacing cement and want to reuse your existing flashing, the total costs could be around £300 -£375. You’ll likely have to add about £100 to £150 if you want to go for a total replacement.

This assumes that the replacement is being done with easy to acquire and cheap roof tiles and that the roof valley allows for easy access as well.

It’s common for roofers to work with a pair and will generally charge about £250 as a daily rate. As far as time frames go, a roof valley repair will generally take around 4 to 6 hours but a full replacement could take up to 8 hours.

Cost Breakdown

The individual costs for getting a roofer to replace your roof valley will be around £450. Of that, £135 will cover the material costs, £225 will pay for the services of the tradesmen and £90 will cover for setting up scaffolding.