Firstly measure from the outside wall of the room along the ceiling to the damp spot dripping area.
Patch repair flat felt roof.
Any leftover dirt gravel and water in the area can prevent the repair material from bonding to the roof.
Permanent flat roof repair this can either be a patch of torched on roofing felt or a layer on top of your existing.
We had a problem with our shed workshop flat felt roof leaking and needed a quick repair.
Always clean up any areas you wish to repair.
Cut a piece of new felt to use as a patch big enough to give above a 50mm 2 inch overlap beyond the repaired blister.
Instead of replacing the felt roof we decided to use a product call.
Diy temporary flat roof repair for felt roofs this is often a paint on fixfrom a tin like the repair videos at the top.
Apply some bitumen adhesive over the repair and beyond to suit the patch and apply it.
Next it s time to.
In addition sweeping the area clear gives you a better view of the damage.
Sweep away water and debris from the damaged area.
If this technique is not possible below are other ways to detect a leak on a flat roof and remember to clearly mark the area of the leak when you find it.