Discover the Cost to Repair or Replace a Roof Valley

Roof valleys are prone to leaking and if you are looking for a price to repair or replace a valley, then you have come to the right place! We have been researching roofing costs and charges for nearly three years and below you will find our prices for this type of roofing work. Perhaps we can save you money today?

Just to be clear: A roof valley is where two sloping roofs meet and rainwater is channelled downwards, usually into a gutter, but sometimes onto a lower section of roof. It should not be confused with a gully which is flat/horizontal.

How you repair a valley located on this part of the roof will depend on what the valley is made from.

Roof valleys are typically constructed from the following materials:

  • Lead
  • Concrete tiles
  • Fibreglass

Quick Guide to Repairing a Roof Valley

There are occasions when a roof valley is in good condition, but the cement has washed out or crumbled. In these circumstances, it may be possible just to leave the existing valley base in place and only replace the cement.

Here are two “before” and After” photos of a valley with newly laid cement. The valley base was in excellent condition, so didn’t need replacing or repairing at all.

Old roof valley - before


Roof valley - after


Full Replacement

If you have concrete tiles as a base for the roof valley then they will need to be replaced, it is almost impossible to repair these and they are prone to leaking.

A full valley replacement involves removing all the tiles in the valley, all the cement and also the underfelt. If the valley has been leaking for a while then this felt is usually rotten anyway.

New timber is first laid to the valley; this is to give the new lead or GRP (Fibreglass) valley support. New felt is then laid on top of this. The valley itself is then laid into place. Both GRP and lead valleys are simply overlapped, although lead should not be used in lengths greater than 1500mm without an overlap (it will buckle/split due to thermal expansion/contraction)

The tiles either side of the roof valley are then bedded onto a 3-1 sand/cement mixture and pointed to leave a neat finish.



How Long Does it Take to Repair or Replace a Roof Valley?

It will take two men half a day, maybe less, to replace only the cement (see two photos above), but if you need the entire valley replaced then it will take around a day for a typical four metre valley. The time it takes varies and ultimately depends on several factors such as access requirements and the type of tiles on the roof.

Cost to Repair/Replace Roof Valley

Example cost 1 – Scaffold to gutter height, replace the cement only, leaving existing the valley in place:

LocationSmall Business /TraderLarge Business
Need a Custom Price? >Compare Up To 3 Personlised Quotes Here
London Area£450.00£600.00
South, SW and Midlands£350.00£450.00
Outer Region and North£350.00£400.00

Example cost 2 – Full valley replacement, scaffold to gutter height, new underfelt, GRP valley and cement work:

LocationSmall Business /TraderLarge Business
Need a Custom Price? >Compare Up To 3 Personlised Quotes Here
London Area£550.00£750.00
South, SW and Midlands£500.00£650.00
Outer Region and North£450.00£550.00

Arrange Your Personalised Roof Valley Quote Today

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3 Responses to “Discover the Cost to Repair or Replace a Roof Valley”

  1. neilMarch 15, 2016 at 11:06 am #

    maybe you should allow someone with some knowledge actually handle your sites information

  2. Pamela BullAugust 2, 2016 at 5:59 pm #

    I would like to no how much it cost to repair two val lies

  3. Freda ClarkeJuly 26, 2017 at 3:45 pm #

    How much does it cost for dry fix ridge tiles on a detached bungalow
    Slate roof

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