Advice on the Repair of Leaky Flat Kitchen Roof

[John Mc]

I have recently bought a house with a small 2.5 x 2.5 metre kitchen extension with a flat roof. With the heavy rain at the weekend it has started dripping along a crack next to the skylight. Climbing on the roof, it seems to have been patched before with squares of roofing felt and had sand and cement laid along the seams. There is one small area of puddling.

I'm thinking of painting over it with Thompson's Roof Seal but realise that it might just be a temporary fix. I'd like to get a bit of preliminary advice before contacting a trades person as they usually talk the job up a bit and judging their competence can be difficult.

I'm uploading some photos.

Thanks a lot for your help.