New Jersey Required Roof R Value

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

New jersey required roof r value.

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. The r value of thermal insulation depends on the type of material its thickness and its density. Insulation r value requirements for usa. The act became effective on february 3 1976.

R 5 shall be added to the required slab edge r values for heated slabs. 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. 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. For a very good introductory overview article on r value see r values over at the website of.

The higher the r value the greater the insulating effectiveness. A common differentiating criteria between different types of insulation is the amount of r value they provide when. Minimum insulation r value requirements non residential above roof deck. Insulation is rated in terms of thermal resistance called r value which indicates the resistance to heat flow.

Uniform construction code regulations njac 5 23 1 et seq went into effect on january 1 1977. Specific insulation requirements of section c402 2 thermal requirements of either. Minimum r value non residential above roof deck 19727 57th avenue east puyallup wa. B u l l e t i n.

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. Or component performance alternative of section c402 1 5 roof solar reflectance and thermal emittance fenestration in building envelope. R value based method of section c402 1 3 u c and f factor based method of section c402 1 4. Attic insulation run between r 49 to r 60.

The r in r value stands for resistance. The state of new jersey passed the new jersey uniform construction code act on october 7 1975. What r value do i need. State applicable energy ashrae zone minimum r value state.

R value of various materials. You should of course see the manufacturer provided technical data sheet for the r value of specific products. Or insulation sufficient to fill the framing cavity r 19 minimum. Resistance to the movement in temperature through walls ceilings and floors in your home or commercial building.

New york recommended insulation r values zone 4. Walls should be between r 19 to r 21 basement walls r 13 to r 19. Insulation r value requirements for new jersey what is r value. Floors r 25 to r 30.

Insulation level are specified by r value. The higher the r value the better the thermal performance of the insulation. Recommended home insulation r values.