For example soak the downhill side of a chimney first then each side then the top on both sides.
Repair leaky roof in winter.
2plumbing vent boots and roof vents.
Start low soaking the area just above where the leak appears in the house.
Roof leaks must be repaired from the outside to ensure the problem is corrected.
For flat roofing look for cracks.
Using salt on the roof edge may be the safest and easiest way.
If there is ice on the roof and it can be cleared do so.
However when it is not practical to climb up on the roof to fix a leak such as during the winter months you can repair a leaky roof temporarily from the inside if you can determine where the leak is occuring from the underside of your roof.
Make use of the flame carefully on the curled shingle edges.
Sealing the shingle to the object can be accomlished with a roofing sealant available at menards lowes etc.
Locate the leaking source and search for the damaged or missing shingles and make a list of the areas to be repaired.
The shingles can be warmed up with a propane torch.
This can be done by several methods.
For loose or damaged shingles remove them by pulling the nail out and scraping glue from underneath the shingles before replacing with new ones.
Roof leaks are confusing to diagnose.
Electric tape works well but it must be applied before the winter season begins a pickaxe works well with risk to further damage to your roof.
Look for cracks in the base of flexible rubber flashing or broken seams in metal varieties of vent pipe flashing.
Isolate areas when you run the hose.
Perhaps placing tube on furnace duct so air heats pre cut tube inside of home then climb up ladder and seal area keeping the sealant warm and easily caulk able.
The rubber gasket that surrounds the vent pipe could be rotted.
The roof shingles should be softened and flattened as the shingles tend to curl up in winter.
Various conditions can cause roof leaks and the origination point may be difficult to detect.
Check plumbing vent boots and roof vents if water is entering from that area to cause the leaking roof.