Ceiling – Horizontal lines on ceiling, roof leaking

ceilingleakingroof

My bedroom's ceiling has been leaking (more like dripping) when it's raining or snow melting, and I highly doubt that the old TV satellite dish caused the roof leaking. (Pic 1)

What troubles me more is that I noticed there is another spot with thin horizontal lines on the ceiling and it’s right above where I usually sit and work. (Pic 2)

I have an inclined roof and the leaking spot is located slightly higher than pic 2's spot.

Can anyone tell me what might be the cause of this kind of line?

the dark spot is caused by my phone's camera

Leaking Spot

Another group of lines on ceiling

Best Answer

Ecnerwal is spot on.

While you figure out how to fix this poke a few holes through the ceiling and place a bucket underneath so the water can get through. It may seem worse initially but remember the water has to go somewhere. If it isn't coming through the ceiling then it's soaking into the drywall and insulation and the extra weight might bring the entire ceiling down to say nothing of damaging even more.

Jonathan