Concrete clay roof tiles.
Porous concrete roof tiles.
Cedar shakes shingles.
Porous roof tiles are more dangerous to walk on as they are more likely to break the leaking water can cause damage to your home and the mould that forms due to roof leaks can present health concerns.
But you can rest easy because it s all a myth concrete roof tiles don t become porous.
Concrete tiles have grown more competitive in price due in part to the rising costs of petroleumbased products such as asphalt shingles.
Although this concerns mainly the looks of your roof in the long run this may result in the enlargement of these currently very small holes.
The porosity of concrete roof tiles measured under laboratory conditions is usually less than 10.
In practice the absorption of water by capillary action during periods of heavy rain would increase their weight by only 5.
Porous roof tiles collect dirt.
For those who don t know porous in this case means the concrete roof tiles will let water through.
Just like the pores on a human face the porous roof tiles may collect all kinds of dirt in the holes and cracks.
This weight increase is extremely unlikely to cause structural roof failure.
Here are some of the risks concerning porous tiles.