Pros | Cons | |
---|---|---|
Without membrane | Good air circulation all over the attic | If something happens to the ridge vent or the metal roof, water can drop to the insulation below - bad |
If the above negative happens, you'll know very soon due to the ceiling wet spot (unless you have a waterproof layer there) | ||
Inspecting everything is easy as everything is in sight | ||
With membrane | In case something happens to the roof or ridge vent, water will flow above the membrane to the gutter | You can't inspect what's going on above the membrane as it's not transparent |
Less air circulation in the attic, most between roof and membrane |
Works at a residential alternative high school in the Himalayas SECMOL.org . "Back home" is Cape Cod, E Coast USA.
"Study books and observe nature; if they do not agree, throw away the books." ~ William A. Albrecht
Idle dreamer
God of procrastination https://www.youtube.com/watch?v=q1EoT9sedqY