Dear Unsure: Yes. The ceiling simply needs to be strong enough to support the weight of the blown cellulose -- which is an ideal insulation soltuion for attics. An installation tip: Install stakes in your ceiling before your being to install the cellulose -- to show the target height. Blown cellulose also settles 13% over time, so add 13% to the target height to achieve your R-value. I hope this is helpful, Mark
Sure. Many older homes had open ends/spaces in the attic/crawl space and that make it easier to blow in (or hand feed) this insulation. Newer homes often have 2"x4" 's that block direct access to such space making this task more difficult. Either way such space is fine to back fill with this insulation. PS: As some settling will occur, you may need to "top off" after some time has passed.
there are chart on greenfiber website. https://www.greenfiber.com/uploads/documents/INS773LD-Cel-Pak-Extended-Coverage-Chart.pdf
Nope, it is paper based. It is dusty but not itchy
Dear Ivan: No. Filling walls with cellulose requires a high-pressure blower and experience. The blower that Home Depot rents is low pressure, designed for attics -- which a homeowner can install. To do a good job filling walls, the walls also need to be open; it is difficult or impossible to fill closed walls (with drywall on the front), due to fire blocking and electric wiring etc. So, the best way to insulate walls is to remove the drywall then fill them with rock wool batts, which provide better insulation -- R-4.1 per inch of thickness. I hope this is helpful. Mark
Dear Derek: First, mold can grow on almost anything, e.g. vinyl trim and furniture - where it grows on the very thin layer of dust that accumulates on the vinyl surface. So mold is more about the environment than the substrate. GreenFiber published a paper titled, "Moisture Control Prevents Mold Growth" answering questions about mold, which is available on their website. The introduction states, "When properly installed and maintained, GreenFiber™ insulation will not promote mold growth. GreenFiber™ insulation meets American Society for Testing and Materials (ASTM) C-739 and C1338i, the industry standards for fungal resistance. The summary highlights the key issue, moisture: "Proper structural and assembly design, construction and maintenance helps prevent mold growth in buildings. Controlling moisture is the best way to prevent mold growth – from the time of delivery and installation of construction materials to managing indoor humidity levels after the building is occupied." Hopefully this answers your question, Mark
Dear Tom: Go to your Home Depot Customer Service desk. They can recommend local contractors who will install it. Blown cellulose is an excellent insulation solution for attics. A few tips: Ask the conractor to install sticks around your attic to measure the depth of the blown cellulose -- which is impossible to gauge after it covers the joists. Also make sure they account for settling; blown cellulose will settle ~15% after it is installed. So increase the depth by 15% to reach the correct R-value. If you have a standard ventilated attic with soffit vents along the bottom edge of the roof and gable wall vents on the sides and/or a ridge vent at the top, the blown cellulose cannot fill and block the soffit vents. Inexpensive baffles must be staples to the bottom of each rafter bay, to keep the vents open. See: Owens Corning Raft-R-Mate Model # 70RM, Home Depot Internet #204853491, UPC Code # 147563710912 I hope this is helpful, Mark
No, please read the bag. it says it will cover 40 sq feet at a value of R19. If we do a quick search r19 is approx. 6" of thickness. So, 40 feet, will likely only be 6" deep.
Yes, Large coffee can or card tubes, you need to maintain 3 inch distance. Many new light fixtures are IC Rated, in those case you blow the insulation and cover them. Even square card board box baffles were use in my rental my a contractor. Remember to put baffles under the eave to insure that your roof intake vents remain open for ventilation. Home Depot sell them! I recommend the plastic style, the styrofoam one were cheaper but break easily when stapled in place.