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 horizontal.

Roof valleys are prone to leaking, especially during heavy rain. How you repair this part of the roof will depend on what the valley is made from. Roof valleys can be constructed from the following materials:

• Lead
• Concrete or Clay tiles
• Fibreglass
• Steel
• Rubber

• Slipped vally slates Slipped vally slates
• Strip and install biger valley Strip and install biger valley
• Water damage to felt Water damage to felt
• New lead installed on slate roof New lead installed on slate roof
• Slates removed Slates removed
• Fiberglass Valley Fiberglass Valley
• Lead Stolen from roof Lead Stolen from roof
• Damage from Valley Leak Damage from Valley Leak
• Lead removed Lead removed
• Slipped slates in Valley Slipped slates in Valley
• Repoint after repairs Repoint after repairs
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https://www.safewayconstruction.co.uk/index.php/lead-valley#sigProIdb0660c0705