Minimum R Value For Roof Insulation Florida

R value is a measure of insulation s ability to resist heat traveling through it.

Minimum r value for roof insulation florida.

For a very good introductory overview article on r value see r values over at the website of. R value of various materials. The higher the r value the better the thermal performance of the insulation. For block walls interior insulation must meet or exceed r 7 8 and exterior insulation must be r 6.

You should of course see the manufacturer provided technical data sheet for the r value of specific products. 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. Insulation level are specified by r value. 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.

2012 iecc 4 r 25 state only fl florida 2014 florida building code energy conservation 1 r 20. All other florida counties are considered to be in climate zone 2 and require a minimum r 38. Foam in place insulation can be injected into walls to reduce air leakage and improve r value. Certain conditions may exist in the home such as cathedral ceilings that may limit the ability to meet these r values.

Opaque thermal envelope insulation component minimum requirements r value method clarifies the use and application of the codes prescriptive building thermal envelope provisions. Know exactly how much you need with our project calculators. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. 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.

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. Raised r 13 sog r 0 windows. Must be inside conditioned space. Minimum r value non residential above roof deck 19727 57th avenue east puyallup wa 98387 web.

Recommended home insulation r values. Deletes the requirement for r 5 thermal. The table below shows what levels of insulation are cost effective for different climates and. When determining how much insulation you need don t guesstimate calculate.

Minimum insulation r value requirements non residential above roof deck. The effectiveness of an insulated wall or ceiling also depends on how and where the insulation is installed. The higher the r value the greater the insulation performance. R value measures how well certain building insulation materials can resist heat.

Framed wall insulation must meet or exceed r 13. State applicable energy ashrae.