Recommended insulation levels for retrofitting existing wood framed buildings.
Attic insulation florida code.
Section 402 4 2 of the code requires building air tightness and insulation installation to be demonstrated as compliant with the code.
Framed wall insulation must meet or exceed r 13.
The florida building code identifies two distinct climate zones.
50 pa in accordance with section r402 4 1 2 of the florida building code energy conservation residential provisions the dwelling unit shall be ventilated by mechanical means in accordance with section 403 of the florida building code mechanical.
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.
Insulation requirements in florida.
For block walls interior insulation must meet or exceed r 7 8 and exterior insulation must be r 6.
Section r316 building thermal envelope code local codes.
Typically current best home building practices indicate an r 30 to r 38 for attic insulation.
Section r806 4 local codes based on irc 2012.
Most insulation you buy will have a sq ft number for easy reference.
In climate zones 5 6 7 and 8 of table r301 1 of the florida building code energy conservation any air impermeable insulation shall be a class ii vapor retarder or shall have a class iii vapor retarder coating or covering in direct contact with the underside of the insulation.
Where the air infiltration rate in a dwelling unit is less than 3 air changes per hour when tested with a blower door at a pressure 0 2 inch w c.
Unvented attic code local codes based on irc 2009.
Climate zone 1 consists of the following south florida counties.
Add insulation to attic.
It provides the option of testing with a blower door to demonstrate that air leakage is less than 7 ach or that tightness be considered acceptable when items.
Section r806 5 spray foam code local codes based on irc 2009.
Broward collier hendry lee miami dade monroe and palm beach and require a minimum r 30 attic insulation.
When designing and building an unvented attic using spray foam insulation you need to take into account code related to.
Residential requirements for insulation are divided by the location in the home.
Let s say you measured your attic and you realize your attic has about 9 inches r 30 of insulation and your attic is about 40 sq feet you d need at least 3 inches of extra insulation that covers 40 sq ft to get an r value of r 38.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
Here s what you need to know about insulation requirements in florida.
