Minimum Roof Insulation R Value Florida

The effectiveness of an insulated wall or ceiling also depends on how and where the insulation is installed.

Minimum roof insulation r value florida.

Minimum r value non residential above roof deck 19727 57th avenue east puyallup wa 98387 web. Recommended insulation levels for retrofitting existing wood framed buildings. Insulating power or r value is only one factor to consider when building or improving a home to keep it comfortable. For a very good introductory overview article on r value see r values over at the website of.

R value measures how well certain building insulation materials can resist heat. State applicable energy ashrae. R value of various materials. Know exactly how much you need with our project calculators.

When determining how much insulation you need don t guesstimate calculate. Meet minimum r values given in table 402 1 1 frame walls r 13 block walls interior insulation r 7 8 exterior insulation r 6 ceilings. Certain conditions may exist in the home such as cathedral ceilings that may limit the ability to meet these r values. For block walls interior insulation must meet or exceed r 7 8 and exterior insulation must be r 6.

All other florida counties are considered to be in climate zone 2 and require a minimum r 38. The higher the r value the greater the insulation performance. Energy star s map of recommended home insulation shows that the majority of florida is within zone 2. Must be inside conditioned space.

This zone has a recommended r value of 30 to 60 for an uninsulated attic r25 to r38 for an attic with existing insulation and r13 to r19 for the floor. 2012 iecc 4 r 25 state only fl florida 2014 florida building code energy conservation 1 r 20. Foam insulation r values range from r 4 to r 6 5 per inch of thickness 2 54 cm which is up to 2 times greater than most other insulating materials of the same thickness. Ceiling insulation must be much higher at r 30 and a raised floor must be at least r 13.

Minimum insulation r value requirements non residential above roof deck. Maximum 20 of conditioned floor area. You should of course see the manufacturer provided technical data sheet for the r value of specific products. Framed wall insulation must meet or exceed r 13.

Foam in place insulation can be injected into walls to reduce air leakage and improve r value. Existing 3 4 inches of insulation. Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value. Different materials respond to weather conditions differently.

Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials.