Even though the asphalt waterproofs the roof highly important for flat roofs the gravel provides an important life extending extra layer.
Rock the roof meaning.
Roof pendants can be studied to determine some of the conditions that existed at the time of intrusion such as the temperature and fluid composition of the magma.
To reach extreme heights.
Origin of through the roof this expression originated in the first half of the 1900s.
A rooftop is the outside part of the roof of a building.
It probably is related to a literal roof of a house.
Ideally the stones are river gravel which has smooth edges and won t cut into the roof when somebody walks around on it.
Go through the roof definition.
To rise to a very high level.
The presence of roof pendants indicates that the igneous body is being observed near its upper surface.
To rise to a very high level.
I assume you re not talking about rocks meaning boulders but rather the layer of small stones you see not just on gas stations but on many flat roofs.
They are exposed by erosion of the overlying rock.