Loose nails. A loose nail creates an open hole, which can cause leaks and subsequent water damage to your roof.

Exposed nails. This could lead to leaks in your roof as the water collects around the head of the exposed nails.

Dark patches on roof. This could be mould. It could also be caused by trees dripping on one place and gradually discolouring the tiles or slates. If you see dark patches, check the interior for dark or discoloured drywall or other evidence of a leak.

Overflowing gutters or excess water running down to the brickwork or dripping into the foundation of the house.

Blistered coating on a flat roof. You can fix these yourself, pop the blisters and coat them with roofing cement to prevent further damage.

Broken, loose, curled or split slates or tiles. There's no way around it, you probably need to call us. If you decide to do it yourself then be careful where you walk on the roof. You could cause more damage than you originally started with.