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

This thin bamboo panel, which appears to float in midair, lets dappled sunlight pass through to the seating area below. Th... Reused steel windows create an eye-catching splashguard in this walk-in shower. The vintage factory windows bring an inter... A galvanized steel tub is a surprising but charming fixture in this bright and breezy screened patio. It's perfect for was... 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... If you lack plumbing skills but have a good sturdy tree, here's the easiest outdoor shower solution of all: Simply attach... 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... How do you like this smart use for an old bottle? Clamp an empty wine bottle to a fence or wall near your outdoor deck or ... Simple and striking, a couple of pieces of "lovingly used" furniture creates a special kind of charm. A weathered chair fo... 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... This garden shed has been decked out to the nines. Designer Orla Kiely created the intimate home for a flower trade show, ...
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon