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.
Porous concrete roof tiles.
Just like the pores on a human face the porous roof tiles may collect all kinds of dirt in the holes and cracks.
Concrete tiles have grown more competitive in price due in part to the rising costs of petroleumbased products such as asphalt shingles.
Compared to unsightly weather beaten asphalt shingles and their replacement costs concrete roof tiles offer an affordable and economical alternative especially when considering their life cycle cost.
For those who don t know porous in this case means the concrete roof tiles will let water through.
Concrete clay roof tiles.
The porosity of concrete roof tiles measured under laboratory conditions is usually less than 10.
But you can rest easy because it s all a myth concrete roof tiles don t become porous.
Here are some of the risks concerning porous tiles.
Cedar shakes shingles.
Given that porous roof tiles are weaker than tiles that aren t suffering from the same issue it means they can also present a danger.
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.
In practice the absorption of water by capillary action during periods of heavy rain would increase their weight by only 5.