High r value with foam insulation in pennsylvania.
Pennsylvania roof inslulation minimum.
Many homes have no insulation at all because building codes didn t even require insulation prior to the mid 1970 s.
Minimum insulation r value requirements by state.
Monthly energy and utility savings of 30 or greater can be achieved when compared to the alternative roofing and insulation systems.
Based on the new code reroofing projects must adhere to the minimum r value of 30.
Continuous insulation zones ashrae 90 1 ashrae 189 1 igcc ibc iecc 2004 2007 2010 2013 2016 2009 2011 2014 2012 2015 2009 2012 2015 0 25 1 15 20 2 15 20 25 3 15 20 25 4 15 20 302535 5 15 20 302535 6 15 20 3035 7 15 20 3540 25 8 20 3540 25 minimum r value non residential above roof deck.
See the department of energy s doe ranges for recommended levels of insulation below.
Minimum insulation r value requirements non residential above roof deck.
Having the correct amount of attic insulation can help you maintain a comfortable temperature throughout your home and help save money on your energy bills plus prevent major issues like ice dams in the winter.
Recommended insulation levels for retrofitting existing wood framed buildings.
If you think you re among the 90 of us homes that are under insulated 1 performing a simple insulation inspection will help you determine your insulation needs.
Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.
Must meet certain minimum.
Add insulation to attic.
State only pa pennsylvania 2015 iecc 4r 30 5r 30 6r 30.
Non residential above roof deck this matrix provides the minimum insulation r values required by local and state municipalities.
R value climate zone chart for wall attics and floors.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
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.
When insulation is exposed during a recover project adding additional insulation may be required to meet the current code requirements.
If you are using polyisocyanurate insulation you will need 2 layers of 2 6 to meet the r value of 30.
What does this mean for you.
State applicable energy ashrae zone minimum r value state local ms mississippi ashrae 90 1 2010 2r 20 3r 20 state local mo missouri 2012 iecc 4r 25.
