Fiberglass Attic Insulation Vs Reflective

Which is better will depend on the topography of the specific roof you re insulating. Reflective insulation is significantly thinner than fiberglass insulation. The sun heats up the roof and then the heat is transferred by radiant heat across the attic space until it hits the attic insulation.

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The reflective insulation trade association also offers installation tips.

Fiberglass attic insulation vs reflective.

Both types of heat are trying to enter your home on a hot summer day. Radiant barriers and reflective systems. In a new house an installer typically drapes a rolled foil radiant barrier foil face down between the roof rafters to. The key to using reflectix properly is that you should take a little time to understand how reflective insulation works in the first place.

The reflectix site provides a great range of information about this and about how it differs from other types of insulation. If your attic has a lot of nooks and crannies your best bet may be to use loose fill insulation made of fiberglass or cellulose. Fiberglass insulation comes in larger batted rolls but is also found as a blow insulation that is primarily used in attics. Radiant barriers reflect radiant heat.

Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. The radiant barrier resulted in roughly 4 times more savings than the added insulation. Fiberglass has been in use by builders since the later portions of the 1800 s. It s easier to incorporate radiant barriers into a new home but you can also install them in an existing home especially if it has an open attic.

Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. Remember traditional attic insulation has r value that works to slow conductive heat. What is the right insulation for an attic. Air migrates from warmer spaces toward colder spaces and insulation is designed to help prevent or at least slow that migration.

Next i compared adding an additional r 19 to my existing r 19 level of attic insulation vs installing radiant barrier and the results actually surprised me a little. Fiberglas insulation has been the undisputed standard for buildings for many years but foil insulation is the new contender.

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As The Attic Temperatures Rise More Radiant Heat Is Absorbed And Transferred By The Ceiling A Reflective Foil Insulation Foil Insulation Fiberglass Insulation

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