Minimum R Value For Roof Insulation Florida

The table below shows what levels of insulation are cost effective for different climates and.

Minimum r value for roof insulation florida.

You should of course see the manufacturer provided technical data sheet for the r value of specific products. The effectiveness of an insulated wall or ceiling also depends on how and where the insulation is installed. R value of various materials. The higher the r value the better the thermal performance of the insulation.

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. For a very good introductory overview article on r value see r values over at the website of. Must be inside conditioned space. 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. 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. Deletes the requirement for r 5 thermal.

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. Insulation level are specified by r value. Maximum 20 of conditioned floor area. Raised r 13 sog r 0 windows.

Opaque thermal envelope insulation component minimum requirements r value method clarifies the use and application of the codes prescriptive building thermal envelope provisions. 2012 iecc 4 r 25 state only fl florida 2014 florida building code energy conservation 1 r 20. Recommended home insulation r values. R value is a measure of insulation s ability to resist heat traveling through it.

Modifies the thermal envelope requirements for above deck roof insulation to be consistent with ashrae 90 1. Foam in place insulation can be injected into walls to reduce air leakage and improve r value. Framed wall insulation must meet or exceed r 13. For block walls interior insulation must meet or exceed r 7 8 and exterior insulation must be r 6.

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. Certain conditions may exist in the home such as cathedral ceilings that may limit the ability to meet these r values. R value measures how well certain building insulation materials can resist heat. Know exactly how much you need with our project calculators.

When determining how much insulation you need don t guesstimate calculate. State applicable energy ashrae.