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It is difficult to give an answer in terms of number of inches or total volume / number of bags required.

For one thing, it depends on how deep the insulation is, i.e. it takes twice as much to make it 6 inches deep as it does to make it 3 inches deep. The deeper / thicker the insulation, the more it insulates. This is usually expressed as an "R-Value" where a higher value is more insulation.

Note also that there are different kinds of blow-in insulation, e.g. fiberglass and cellulose. These have different properties and require different amounts to achieve the same thermal effect.

One easy way to figure this out would be to go to the store where you plan to purchase the insulation and look at the bag. The bag will have a chart that shows the square footage or dimensions of the space to be insulated and the number of bags required to achieve various R-Values. If you know the company who manufactures the insulation, you can check their website. It is quite likely they have a similar chart of calculator as well.

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Q: How much blow in insulation needed for 12' x 14' attic space?
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How do you blow in insulation in attic?

To blow in insulation in an attic, you will need a machine specifically designed for this purpose, which can usually be rented from hardware or home improvement stores. Ensure the attic is properly prepped, insulated around electrical fixtures, and that you have the necessary protective gear. It's recommended to follow the manufacturer's instructions for the specific type of insulation you are using.


What are value of insulation should you have in AZ?

in arizona according to the Department of Energy, they call for in an attic insulated home to have the equivalent of 16 inches to 18 inches of blown in attic insulation. Attic insulation is measured in R values regardless of what type of insulation you blow in or lay down. Attic guard is usually your best type of insulation which should be blown in at an R value of 49-60 in an Arizona home


Can blow insulation cover knob and tube in attic?

It's done all the time, no problem.


Is attic baffles required if you have 1 inch of clearance above insulation i am using batts for the attic insulation also the building is a metal structure?

The reason baffles are used is so the blow in insulation does not cut off the air flow coming in from the soffit vents. If you are satisfied that your batts provide enough flow at the eves then call it good. This assumes you have ventilation at the ridge, otherwise it will not be very useful.


Can you put kraft faced insulation in your attic over already installed blown in insulation and if so would you put the paper side down that is toward the rooms below?

I went to a seminar about attic insulating materials and this is what I learned. If you already have blow-in insulation in your attic you shouldn't need more fiberglass. Instead, you will want to install a reflective radiant barrier insulation. Fiberglass and cellulose are designed to slow down heat escaping so you eventually lose most of your heat through the ceiling regardless. You need something to re-direct the heat once it passes through the blow-in insulation. Radiant Barrier will reflect a majority of the heat back once it escapes your blow-in insulation. I bought some Ecofoil online and just rolled it out over top of my existing blow-in insulation, it was very easy. When installing radiant barrier over the attic floor you must use the perforated radiant barrier for maximum breathability. Moist air that is created inside your home must be able to escape as it rises through your ceiling. If a perforated radiant barrier is not used, the moisture will be trapped in between the barrier and your ceiling. When trapped this will cause condensation to form inside the building materials and insulation creating damage and mold.


How do you install blown insulation?

This is the process commercial insulators use. It involves a large truck mounted blower and as much as 200 feet of hose to shred and blow insulation into an attic area. If you are a do-it-your-selfer, you may want to consider R30 batts.


How much should it cost to blow in 12 inches of attic insulation and install radiant barrier in a 2000 sq foot one story residence?

The cost to blow in 12 inches of attic insulation and install radiant barrier in a 2000 sq foot one-story residence can range from $1.50 to $3.00 per square foot, depending on the material used and the location. So, the total cost could range from $3,000 to $6,000. It's best to get quotes from multiple contractors to find the best price for your specific needs.


Can you blow insulation on top of can lights?

Can lights that are rated as IC "insulation contact" are the only style approved for use with blown or batt insulation.


Are there any Insulation companies that blow insulation in exterior walls, for residental.?

Sustainable Resources Center does insulation like that Minneapolis, MN - (612) 870-4255


Can a thermostat cause heater in house to blow cold air?

No, not if it's on a heat setting. Most home thermostats have a "Fan" setting that will blow cold air if the attic is cold.


Is faced insulation required for an attic?

There are many different building codes affecting all areas of the country based on the weather factors. Most building codes require a faced insulation or some type of vapor barrier between the insulation and the ceiling. After the first layer is down you can either blow in or lay out batting material to meet the "R" factor requirement. Copy and paste this link into your browser for some do it yourself videos and articles regarding insulating your home or business. http://www.thediyhomepro.com/a00036.php Good Luck!


Why would insulation blow from home AC register?

some AC duct is made of insulation wraped in foil it could be a number of things ei. old duct to rodents