This is because you can make your home much more energy efficient by removing plywood flooring, if you have any, and adding an extra layer of insulation. If there are HVAC ducts in your attic, creating a conditioned attic where the insulation is under the roof deck is a good option. The floor was 2x8, so I had densepack cellulose blown in. Pitched Roof with Counterbattens. Better materials for attic roof insulation are rigid foam boards and spray foam insulation. My question is… Is 6in enough as related to r value? 1. R-value for fiberglass or wool batts, per inch is between R3 and R3.5. So bare in mind when asking for the price don't forget to … Spray foam not only insulates but air seals the floor as well. Spraying the floor minimizes the surface area you spray, minimizes the amount of foam needed, and minimizes your utilities because you’re only heating and cooling the area you live in. In other words, you’re not paying to heat and cool the additional square footage … I would cut foam boards to direct the air flow from the soffet vents to the under side of the attic foil. Spray Foam Insulation; Attic Insulation; Insulation Removal; Blown In Insulation; Basement Insulation; Container Insulation; Radon Protection; Fireproofing; Air Barrier Systems; Commercial Foam Insulation; Spray Foam Roofing; Blog; Contact; What to Do Before Insulation Installation. Throughout her … If your home sits on a vented, unconditioned crawl space or basement, your home is wasting a lot of energy. One or the other. Spray Foam Attic Floor or Rafters: Which is Best to Insulate? Your article is one of the only one that even mentions it. Spray foam was applied between the floor joists. In contrast, traditional insulation panels need to be laid across the attic floor space, with a thickness of up to 10 inches – but if insulation is sprayed directly into the roof rafters, the floor can be made up of thinner material to provide additional … Thank you . You don't want both the rafters AND the attic floor to be insulated. He told me they could insulate the attic ceiling and the gable walls with open cell spray foam (I don wonder if closed cell spray foam is the better choice to achieve a higher R Value), which also needs to be coated with a fired retardant, which is also sprayed on like paint. So my builder wants to spray foam all the rafters in my attic. Insulation is one of the most … It can act as an air and moisture barrier in addition to providing very high R-value. The goal would be to encapsulate the attic floor yet still have attic ventilation. Look up and from eave to eave there is foam insulation but none below you. You would put the insulation on the attic floor. Pros: Easiest insulation for layperson to install, fairly inexpensive, R-value doesn’t fluctuate as with loose-fill. Option 1: remove the insulation on the attic floor with spray foam on the roof deck U x A x delta T = heat gain Where: U = 1/R = 1/22 = 0.045. It was removed and replaced. This is because the effects of thermal bridging are limited which also results in the elimination of melt lines on the roof surface in cold climates. Amanda previously has worked as a breaking news and crime reporter, TV news producer, and editor in Flint and Detroit. A = area of roof decking or 2600 sq ft. Delta T = 93 … This has a higher rating than the blown in insulation that was originally used. Secondly Irish build regulations part L Ventilation require a 50 mm air gap between roofing felt and insulation to allow the structure to 'breathe', this prevents damp and mould build up. Firstly the insulation need to be installed between the rafters now on the floor, which means the depth will be limited the size of the rafter. The attic Spray foam: Technically known as Spray Polyurethane Foam or SPF, spray foam is most commonly applied in the space between attic rafters. As spray foam insulation is installed within roof rafters, the floor of the attic space is freed up, and actually gives you more room within it. If you are converting an attic to living space, SPF is a smart option to choose. Keeping this in view, can you put insulation between rafters? Nothing unusual about that. … Blog Home Insulation What to Do Before Insulation Installation. If you have lots of room to work and are only trying to insulate your house better, then the molded or beadboard could be an option. The expert analysis report concluded that the SPF was installed over very wet OSB, which sealed in the liquid water that caused the structural deterioration. A ... Spray foam is considered a high end insulation because of the cost and because it is seen as a fix-all solution for insulation or air sealing. Insulation, Radiant and Vapor Barriers - Insulating an Attic - Spray Foam in the Rafters v. Cellulose on the Floor - My house is a single story ranch in Connecticut and it was built in 1957. Some building designs don’t feature an attic in the traditional sense. What is the Best Insulation for an Attic? Rolls are usually used for long expanses such as length of floor for entire attic, while batts are fit between studs in attic rafters. Many manufacturers are … Reply ↓ T.D. 3,945 posts, read 9,979,542 times Reputation: 3150. Closed cell SPF is an effective thermal, air, moisture and vapor barrier. Attic rafter cavities filled with spray foam can add as much as R-28 in insulating value. Attic insulation installation with our insulating spray foam is a beneficial procedure that can prevent this air loss. (Spray Foam vs Fiberglass vs Cellulose) Open Cell or Closed Cell Spray Foam: Which is Best for the Attic and Roof? And is it worth the extra money? If you are working with foam board in the attic, you need to consider your budget. … Out house has a ground floor, second floor and an attic floor. It can act as an air and moisture barrier in addition to providing very high R-value. Stop using your attic for storage. But space and function are also important considerations. Winter is almost the same (1-2 degrees warmer upstairs). I found a DIY product (tiger foam) that is about $1.15 per sqft for materials for a 1-2 inch foam application (2 passes). Spray foam is moisture and mold resistant, but it needs professional installation. the attic is inside the thermal envelope and all the mechanicals and electrical are free and clear less a few wires that go out to the eaves and the Vent stacks. 2” closed cell foam insulation flooring. Closed cell spray polyurethane foam (SPF) is an excellent choice for insulating attics and rim joists. The rafters were 2x6. Cold floors, drafty rooms and high energy bills … Spray foam: Technically known as Spray Polyurethane Foam or SPF, spray foam is most commonly applied in the space between attic rafters. Spray foam with an estimated R-40 was applied at the cathedralized roof structure at the attic. In order to accomplish an effective thermal barrier from obstructions like ductwork, plumbing, wide/narrow joist spacing, and plumbing, spray foam insulation must be applied between the floor joists of your crawl space. Spray foam insulation can be applied as attic insulation, wall insulation and floor insulation. The OSB roof sheathing was structural failure, as it was swelled and deteriorated. The foam will seal the attic cracks into the living space and increase effectiveness even greater than blown in insulation. Shingle Warranty After Spray Foam Attic Insulation: Benefits and Pitfalls of Spray Foam Insulation According to the US Environmental Protection Agency (EPA), spray foam is recognized as a premier alternative to the batt insulation of years past. Inoue on March 20, 2016 at 1:02 pm said: A lot of “green” … Your thoughts? The spray foam is on the underside of the roof deck! Cold roofs prevent ice dams. But if the floor is covered in plywood, you can't stuff enough insulation beneath it to do the job sufficiently—not even in warm climates. Spray foam insulation expands as it is applied, filling every gap around joints, plumbing, wiring, ducts and fixtures. About Amanda Ringler. Image Credit: c12/iStock/GettyImages Rigid foam sheets have no fibers to collect condensation and harbor mold, so they are often used to insulate floors, unfinished basements and other places … Yes. In the summer, the 2nd floor is only a few degrees (2-3) warmer than the first floor. 2. Insulating your home in this manner is a cheap and easy way to go about it because you can easily buy bags of … (1A) Attic access door. I am looking at using spray in foam on my existing attic floor. I have one major issue with spray foam insulation on roof sheathing (attic side of the sheathing) and that is the difficulty in detecting leakage. A: Tom Silva replies: Spray foam is great insulation, but it's fairly … I was thinking of using your Attic foil for the roof rafters and 2" Dow Tuff R for the Attic floor and seal it with cracks with spray can foam. Got a few quotes for 6in of open cell spray foam for the attic floor in the $2000-2500 range. The section between the rafters may be filled with insulation if all penetrations through the ceiling are sealed and if this is permitted by local building codes or standards (see hot roof in Section 5.2.2, Concentrate on air sealing, subsection Spray foam under the roof). 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