Average Labour Cost/Price to Fit/Replace/Repair Roof Valley

To clarify the following prices it is recommended that you read the article in the INFORMATION box below the PRICES…

(These prices are based on a tradesman’s rate of £150.00 per day and a labourer if required at £100.00 per day. This includes the cost of buying and collecting any materials, dumping any waste if necessary and any incidental materials they will need. The minimum price will usually be for a half day)

How Much Does it Cost to Replace a Roof Valley?

roof valley

Job 1
To replace a 4metre long zinc valley on a slated or tiled roof, with a nice new lead one! This will take 2 men a day and they will need a scaffold tower.

They should use 18” wide, code 4 lead, turned back at the edges. This should be laid in two 5’ lengths with a third length at the top. The overlaps should be 6” minimum and the only fixings should be a few copper nails under the overlaps. There should be a thin layer of fibrous material between the lead and the valley board. This can be an off cut of breathable roofing felt but must never be bituminised felt.

Labour…£250, lead and a few slates…£150, scaffolding……£200,

Job 2

To replace a few broken valley tiles on a tiled roof.
This will take an hour plus materials

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A Price Guide and Information Sheet on Replacing and Repairing a Roof Valley


So you want a new valley?

Get it done in lead. I’m not even going to give prices for any other material. One thing the Romans did for us was to introduce the finest (roofing) material ever created. Now… I don’t know much about Hadrian’s
house but if he’d put a lead roof on it, maybe it wouldn’t just be his walls that were still standing.

Lead lasts for ever, if a roofer fits it properly when he’s 25, it will
easily outlast him and all his progeny!

It comes in 6 metre (20’) rolls, in various thicknesses (called codes – 3, 4, 5 etc.) and different widths from 6” (150mm) to 48” (1200mm). Different codes and widths are used, depending on what the lead is being used for and how long each individual section needs to be.

That’s the theory anyway!

Lead expands and contracts a great deal, if the roofer uses a length which is too long relevant to its code (thickness), it will eventually buckle and split. i.e. code 4 lead is very common on domestic roofs but should never be used in lengths exceeding 1500mm. The width isn’t really relevant.

It is possible to create a valley in a
plain tiled roof, using only the tiles themselves. These are called “swept valleys” and are difficult to do. I used to live near a 1930’s estate which had all swept valleys and I must have replaced a dozen of them. They leaked you see! Even the proper tradesmen of my grandad’s day were capable of getting it wrong. If a swept valley leaks it’s best to replace it with a lead one.

OK….. I might as well carry on with the valley descriptions. There is yet another type which is used with tiled roofs, that incorporates “valley tiles”. These work fine until they crack because as there’s nothing under them the water can get in. When valley tiles leak, the problem is solved by slipping in a replacement.

A-Z of Job Pricing