Atelectasis comes from the Greek words ateles and ektasis with the literal meaning âincomplete expansionâ. It pertains to collapse, either complete or partial, of the lung, which may subsequently cause decreased volume and diminished gas exchange. [ 1, 2, 3 ]. An image representing Atelectasis, or collapsed lung.
If you are asked to apply a second coat while the first is still wet, make sure you do so. Nothing ruins the look of a deck more than a poorly applied stain or finish. TAGS: clear deck stains, deck stain types, opaque deck stains, semi-transparent deck stains, wood stain.
Algae is more likely to grow on shaded roof sections (probably the cause of black stains on the lower roof in the photo at above right), while asphalt shingle bleed-through stains more often appear to emanate from single points regardless of sun or shade exposure (probably the cause of stains in the photo at above left).