New Jersey Required Roof R Value

Recommended home insulation r values.

New jersey required roof r value.

You should of course see the manufacturer provided technical data sheet for the r value of specific products. 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 r value requirements for new jersey what is r value. R value is a measure of insulation s ability to resist heat traveling through it.

Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. A common differentiating criteria between different types of insulation is the amount of r value they provide when. Uniform construction code regulations njac 5 23 1 et seq went into effect on january 1 1977. R value of various materials.

For a very good introductory overview article on r value see r values over at the website of. Walls should be between r 19 to r 21 basement walls r 13 to r 19. Existing attic 3 4 inches of insulation r 38. Insulation is rated in terms of thermal resistance called r value which indicates the resistance to heat flow.

State only nj new jersey ashrae 90 1 2013 4 r 30 5 r 30 state only nm new mexico 2009 new mexico energy conservation. The higher the r value the greater the insulating effectiveness. The r in r value stands for resistance. Minimum insulation r value requirements non residential above roof deck.

The state of new jersey passed the new jersey uniform construction code act on october 7 1975. Insulation level are specified by r value. Attic insulation run between r 49 to r 60. Resistance to the movement in temperature through walls ceilings and floors in your home or commercial building.

What r value do i need. State of new jersey department of community affairs division of codes and standards po box 802 chris christie trenton new jersey 08625 0802 governor kim guadagno. Specific insulation requirements of section c402 2 thermal requirements of either. Or component performance alternative of section c402 1 5 roof solar reflectance and thermal emittance fenestration in building envelope.

R 5 shall be added to the required slab edge r values for heated slabs. B u l l e t i n. Floors r 25 to r 30. 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.

Minimum r value non residential above roof deck 19727 57th avenue east puyallup wa. State applicable energy ashrae zone minimum r value state. All construction codes and their enforcement were controlled by the provisions stated in the act. Insulation r value requirements for usa.

The r value of thermal insulation depends on the type of material its thickness and its density. New york recommended insulation r values zone 4. The higher the r value the better the thermal performance of the insulation.