Minimum Roof Insulation R Value Florida

For a very good introductory overview article on r value see r values over at the website of.

Minimum roof insulation r value florida.

For block walls interior insulation must meet or exceed r 7 8 and exterior insulation must be r 6. When determining how much insulation you need don t guesstimate calculate. Framed wall insulation must meet or exceed r 13. Add insulation to attic.

Know exactly how much you need with our project calculators. Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. Raised r 13 sog r 0 windows. Ceiling insulation must be much higher at r 30 and a raised floor must be at least r 13.

You should of course see the manufacturer provided technical data sheet for the r value of specific products. 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. Insulating power or r value is only one factor to consider when building or improving a home to keep it comfortable.

Must be inside conditioned space. R value measures how well certain building insulation materials can resist heat. Existing 3 4 inches of insulation. The effectiveness of an insulated wall or ceiling also depends on how and where the insulation is installed.

Foam in place insulation can be injected into walls to reduce air leakage and improve r value. 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. Certain conditions may exist in the home such as cathedral ceilings that may limit the ability to meet these r values. Recommended insulation levels for retrofitting existing wood framed buildings.

Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. 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. The higher the r value the greater the insulation performance. All other florida counties are considered to be in climate zone 2 and require a minimum r 38.

State applicable energy ashrae. Minimum r value non residential above roof deck 19727 57th avenue east puyallup wa 98387 web. 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. Maximum 20 of conditioned floor area.

R value of various materials.