no
Perhaps, but not guaranteed. Tile is generally much heavier than asphalt or "composition" shingles. If you're concerned, have a roofing contractor to evaluate your roof.
With composition shingles, no felt is necessary between shingle layers. When the exposure of the shingles is the same as the old exposure, the bottom edge of the old shingles is used as a guide for the upper edge of the new shingles in placement. This ability to place the shingles would be lost if covered with felt.
In general, this is the recommended replacement schedule based mostly on the material used: Composition Shingles: 12-20 years. Asphalt Shingles: 15-30 years. Wood Shingles: 20-25 years.
If there is only one set of shingles on the roof, cover over it. If two, remove the old and then apply the new.
no, because eventually it will dry out and crack, or blow off. the shingles are built to withstand the heat, rain and wind.
They are probably not metallic, but are grit that has washed off the roofing shingles.
no
You can, but it is not recommended. It used to be done all the time when asphalt shingles first started to be used. It makes for a lumpy roof and will puncture easier from hail or being walked on.
80 squares is a measure of area, it doesn't apply to length.
Can I apply lawn fertilizer after rain/
To properly install ridge cap shingles on your roof, follow these steps: Start by measuring and cutting the ridge cap shingles to fit the length of the ridge of your roof. Apply a bead of roofing cement along the top edge of the ridge. Place the ridge cap shingles over the ridge, making sure they overlap each other and the roof surface. Nail the ridge cap shingles in place using roofing nails, ensuring they are securely fastened. Apply additional roofing cement over the nails and seams to seal and protect the ridge cap shingles. It is important to follow the manufacturer's instructions and safety guidelines when installing ridge cap shingles on your roof.
To clean asphalt shingles effectively, start by removing debris with a broom or leaf blower. Then, mix a solution of water and mild detergent, and apply it to the shingles with a soft-bristled brush or low-pressure sprayer. Gently scrub the shingles and rinse thoroughly with water. Avoid using high-pressure washers, as they can damage the shingles. Repeat the process if necessary to achieve desired results.