Slope of the roof (nothing at approximately 17 degrees) is too low to cope with the water that moves down the roof. Prior to the slightest wind power will stop the water flowing properly. Slowly but steadily push the water up to roof tiles and to your roof space. This is especially true for flat profile tiles and tiles with minimal duplication. Terracotta tile, or similar to cope with this problem much better.
All perfectly flat tiles should have sarking roof installed before. This is determined by Australian standards. New tiles are often made flat raised edge pools to accommodate the lower step so more relaxed standards for these tiles.
As with all roofing materials, the lower the slope of the roof, the more I suspect that the roof leaks when rain falls. Roof sarking or silver foil installed under tile trims overlapping 100 mm in the ditch before tile installation. Foil ensures that if the water does not enter the roof space, is blowin ‘in the Fountain.
The old roof with a low step, perhaps, were not originally installed with sarking. In addition, the film they can use decayed over time and be very fragile. Openings will be displayed in places where water flows through. In both cases, the new sarking of the roof should be installed.
This is a fairly simple but time-consuming task. This process is associated with roof tiles and battens in most cases will be canceled, sarking is installed, and then jets to be re-installed. Often, roof tilers will need to work back into the roof tiles as jigsaw puzzles, so this work is always best left to professionals. Ridge capping, which may be concerned also in need of repair.
The cost of such repairs are usually developed around $ 50 per square meter depending on the extent of repairs to be done.