Recommended R Value For Attic In Florida

Solid wood has an r value of 1.

Recommended r value for attic in florida.

The higher the r value the greater the insulation performance. If your attic has enough insulation and your home still feels drafty and cold in the winter or too warm in the summer chances are you need to add insulation to the exterior walls as well. Energystar recommends an r value of r 38 for most homes. When determining how much insulation you need don t guesstimate calculate.

Typically current best home building practices indicate an r 30 to r 38 for attic insulation. Most computer programs allow the user to calculate gross wall areas and subtract window and door areas. Framed wall insulation must meet or exceed r 13. Blown fiberglass installed in the attic has an r value of 2 2 per inch so 12 inches of it would give you an r value of 26 4 in your attic installation project.

Recommended insulation levels for retrofitting existing wood framed buildings. Broward collier hendry lee miami dade monroe and palm beach and require a minimum r 30 attic insulation. Add insulation to attic. You can see on home depot s website how many inches translates to a certain r value.

This zone has a recommended r value of 30 to 60 for an uninsulated attic r25 to r38 for an attic with existing insulation and r13 to r19 for the floor. Climate zone 1 consists of the following south florida counties. The florida building code identifies two distinct climate zones. Insulation requirements in florida residential requirements for insulation are divided by the location in the home.

R value measures how well certain building insulation materials can resist heat. The r value your home s attic needs depends on where you live. R values of framing members concrete blocks gypsum board etc. An r value is also calculated per inch of width.

Existing 3 4 inches of insulation. Know exactly how much you need with our project calculators. For block walls interior insulation must meet or exceed r 7 8 and exterior insulation must be r 6. Walls are entered by the type of assembly and the r value of insulation.

Therefore a three inch thick board has an r value of 3. See the department of energy s doe ranges for recommended levels of insulation below. Homes should have between r 22 and r 49 insulation in the attic. Let s start at a base point.

That translates to about 12 inches of insulation. All r values are insulation only tested labeled per ftc rule16 cfr 460.