The answer to this query depends upon regardless of whether you've got a lot of sophisticated wiring in your attic. If there are various wires and junction boxes, the help of an electrician may be a must have in making sure your insulation guards against pricey drinking water destruction.

1. Sure, you happen to be correct -- your attic needs At the least 6 inches of cellulose in addition to the present fiberglass. Before you blow in The brand new insulation, nevertheless, it is vital to peel back the fiberglass batts and seal all of the present air leaks.

The whole volume of recycled materials Employed in fiberglass insulation differs from model to brand name and product to merchandise, but some goods are made with as much as eighty percent recycled glass.

When you are burying ducts in blown-in fiberglass, I hope They can be to start with insulated with duct insulation Geared up with a vapor barrier. Or else, the ducts will be dripping damp over the summertime months.

Moisture Develop-up in between fiberglas and the exterior of your residence can't evaporate. Warnings around the insulation rolls advise you to definitely wholly shield yourself from coming in contact with fiberglass. Batts don't seal partitions, ceilings and crawlspaces tightly.

Most often, you won’t have to absolutely change your attic insulation. Only in scenarios of the animal infestation or significant drinking water destruction will an expert should go in and rip out all the prevailing insulation when including new components.

I'm arranging on working with a combination of 1'' XPS and one'' poly ISO in a very rafter cavity which also serve as a ventilation cavity. I was taking into consideration the ISO board be essentially the most inside Component of the stack as a result of its lower perm ranking.

In many areas, community developing codes even enable the usage of fiberglass insulation as an effective fireplace prevent in wall assemblies made of wood or steel.

You will find a authorities tax credit rating for using this product or service Within this software, so Martin, would you put it on your suggestion listing, or is there a downside I am not seeing?

You're in a troublesome spot, since your ductwork and furnaces can be found in the wrong spot -- beyond your residence's thermal envelope.

3. Furthermore Robert, Martin is proper about R-benefit and radiant barriers. Not knowing The essential concepts of radiant Power transfer reflect in your incorrect conclusions with regard to R-worth and radiant barriers. I check with your statement a couple of estimate from Martin, “Just one uncomplicated distortion is ‘radiant barriers don't have any R-price’.” To split hairs even more, there is no these kinds of factor as radiant heat, only radiant Strength. The 2 are usually not synonyms. Radiant Electrical power is made up of photons, it's the interaction of such photons with make any difference that creates heat (and foil reflects photons). R-price can be a measure of thermal resistance to heat movement; because foil is a conductor then it does not have a resistance to thermal heat circulation. Thus the foil by itself delivers no R-price by definition (because it displays photons not warmth). Even so, by reflecting photons from objects radiating Electricity (foil is circuitously in contact with) it reduces absorbtion with the photons which result in heat. This leads to an noticed R-benefit maximize of the make any difference it can be hooked up to.

Insert 3/4" battens to your the bottom of each joists. Connect ceiling substance to batten leaving an air Room in between the radiant barrier Eco friendly fiberglass insulation and the ceiling product. I in fact want an air Room over the radiant barrier as well, Consequently generating an real barrier to lower radiant warmth reduction from the ceiling. Exactly the same construction system can be utilized to reduce warmth reduction via exterior partitions.

Oct 30, 2010 twelve:33pm

For my own house built-in Maine I utilised a radiant barrier on The nice and cozy aspect of R-19 walls and R-30 2nd floor ceilings under a ventilated attic. So far, so superior.