If the insulation chosen is porous a top layer of waterproofing is added.

This scenario happens when ground surface is more than 2000 meter above sea level with wide spreading conservative geology and porous layers.

Oligochaetes are also abundant in areas supporting porous and spongy layers of algal mat.

Scientists elsewhere are not so sure, concerned that radiation could reach the ocean through a porous layer of limestone.

Oil is then applied to the heated part, which seals it by "sinking" into the applied porous layer.

This situation will result in a porous layer made of particle aggregates at the surface, and is referred to as ripening.

The porous layers were compressed over time and forced upward.

The cathode, or air electrode, is a thin porous layer on the electrolyte where oxygen reduction takes place.

A porous layer next to his skin permitted the transfer of fluids and gases necessary to his health.

Niobium treated with sodium hydroxide forms a porous layer that aids osseointegration.