The roof is part of the house which is most exposed to the weather conditions, so it deteriorates the fastest. To keep the house roof always in good shape, it should be regularly maintained and repaired.
The most common parts of the roof that are exposed to the weather conditions are the roof tiles, gutters or grooves for drainage and woodwork on the pediment side of the house and below the roof. Professional roofers would give you advice about the kinds of materials to use for repairing or constructing a new roof.
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Roof tiles are exposed to weather changes like sunlight, rain, moisture, and eventually all this leads to peeling of the upper surface and the cracking. Roof tile’s rate of decay depends on the quality of workmanship and baking. As the pores are opening, the water runs into them, destroys them and they crack. Cracking most often occurs breadth wise which can also be dangerous. Normally this is not visible if it is not carefully controlled because the water from the bottom of the roof dries quickly. Such a situation is dangerous, because the moisture underneath the roof destroys the wood and it slowly decays.
If you have insulation against moisture in the form of cardboard under a roof tile, the situation is somewhat better but then cracked roof tiles may need replacing. The situation can best be seen by climbing onto the roof and visually identifying the cracked tiles.
Advice: Before climbing onto the roof and walking on the tiles, prepare yourself a plank 200 x 25×2.5 cm and walk on it. You should cull your weight on 10 roof tiles; otherwise if you’re heavier every step can cause tile cracking.
First pull out surrounding tiles around cracked tiles, 2 above, one to the left and one to the right.
Replace the tile; of course with the same type and design as the previous tile, align it with others in the slots.
Along with breakthrough of moisture through the tiles, breakthrough of moisture from the attic to the outside is more dangerous. If the attic is hermetically sealed, the moisture will not be able to go out through the roof, so the tiles inside will “sweat.” For this reason the attic should be ventilated or side windows should be installed.
Look for a dry place on top of the roof and take a position. Take a bristle brush and then brush the roof top to take off the moss. You should not brush to roof top to avoid cracking the shingles. Get a mixture of nontoxic oxygen bleach and water ready in a bucket. Stay away from chlorinated whiten, since it is going to discolor the roof shingles. Clean up the bleach liquid onto roof top with a paint brush, allowing 20 minutes to rest. After, brush the roof top with a dirt free bristle scrub brush. Examine the spots in-between the shingles making sure that they are in position. If they are not, they will probably need to be changed. If the roof shingles are actually in good condition, you can pressure clean the roof area. Rinse down the roof top from the top of the roof to stop fluid from entering the shingles from the underneath, and then allow drying. When roof is dried up, install 10-foot by 5-inch copper strips (get copper at an appliance or roofing supply shop, and give expert cut materials) and insert underneath the top line of the shingles. About 1 inch of copper should be left open. Finally, any time it rains the copper residue is going to run down and therefore stop moss from growing.