01:54PM | 10/04/05
Member Since: 10/03/05
2 lifetime posts
i have a circa '64 house with about 4 inches (original) of blown insulation in the attic. being 40 years old, it is pretty compressed and, given my location, woefully inadequate. i purchaced some non-faced FG batts to go over the top and was all set to install them when i noticed that most of the attic has no vapor shield under the cellulose!

so, do i....

a) move the cellulose, install the plastic, put it back, and then install the batts?

b) move the cellulose, chuck it, and install faced batts with a higher r value?

c) let sleeping dogs lie and just fiberglass and forget?

d) run screaming for the hills?

you make the call!


02:57PM | 10/04/05
Member Since: 01/28/03
693 lifetime posts
If the attic is ventilated, then no vapor retarder is required.

If it is not ventilated, then the simplest thing to do is to place fiberglass batts on top of the existing cellulose and then to use a paint on the ceiling below that will provide at least a 1 perm rating and act as a vapor retarder.


03:13PM | 10/04/05
Member Since: 10/03/05
2 lifetime posts
thanks to the previous owner, i have two gabel vents, an attic fan, a total ridge vent and some very leaky, though not intentionally vented, soffets. for a ~1200 ft^2 attic, this is probably ventillation overkill.

the ceiling already has more coats on it than a sherpa, so one more can't hurt. hopefully that will be barrier enough. it mustn't be too bad as is, b/c there is no sign of moisture in the existing cellulose.

thanks for your 2 cents!

any other opinions out there?


Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.


type the code from the image


Post_new_button or Login_button

These stylish cabinets are a classier way to store laundry goods and give the room a sophisticated, polished look.  It turns out that many bath and kitchen cleansers contain chemicals that are dangerous to the skin and eyes, and often pro... So often we paint tiny nooks white to make them appear larger, but opting for a dark, dramatic wall color like this one—Be... Chocolate-colored walls and large window frames allow the exposed wood beams to take center stage in this small screened p... If you're not crazy about the idea of commingling plants and pool, this modern variation may be more to your liking. The s... Yes, a freestanding garage can become its own tiny house. Artist Michelle de la Vega has all the comforts of a modern resi... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... Pursue what's known as the stack effect. To achieve it, open the windows on both the upper and lower floors, and as warm a... Like no other floor type, a checkerboard design works wonders to underscore the retro kitchen theme. Vinyl flooring, ceram... Twine lanterns add pops of crafty—but sophisticated—flair to any outdoor setting. Wrap glue-soaked twine around a balloon ... When securely fastened to a tree or the ceiling of a porch, a pallet and some cushioning make the ideal place to lounge. V... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... For the cost of a can of exterior paint , you can totally transform your porch. Paint the floor a hue that complements yo... In this urban apartment, a standard-issue patio became a serene and green perch by replacing the typical concrete with gro... If you put the washing machine in the mudroom, you can stop the kids from walking through the house in dirty, grass-staine...
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon