Recommended R Value For Attic In Florida

Homes should have between r 22 and r 49 insulation in the attic.

Recommended r value for attic in florida.

Most computer programs allow the user to calculate gross wall areas and subtract window and door areas. R value measures how well certain building insulation materials can resist heat. 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. The florida building code identifies two distinct climate zones.

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. The higher the r value the greater the insulation performance. For block walls interior insulation must meet or exceed r 7 8 and exterior insulation must be r 6. The r value your home s attic needs depends on where you live.

Broward collier hendry lee miami dade monroe and palm beach and require a minimum r 30 attic insulation. See the department of energy s doe ranges for recommended levels of insulation below. Energy star s map of recommended home insulation shows that the majority of florida is within zone 2. Add insulation to attic.

Now that you have an idea of the depth you need you need to measure the width and length of your attic. When determining how much insulation you need don t guesstimate calculate. Existing 3 4 inches of 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.

R values of framing members concrete blocks gypsum board etc. Solid wood has an r value of 1. An r value is also calculated per inch of width. Walls are entered by the type of assembly and the r value of insulation.

Recommended insulation levels for retrofitting existing wood framed buildings. Therefore a three inch thick board has an r value of 3. Know exactly how much you need with our project calculators. Climate zone 1 consists of the following south florida counties.

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. All r values are insulation only tested labeled per ftc rule16 cfr 460. Framed wall insulation must meet or exceed r 13. Insulation requirements in florida residential requirements for insulation are divided by the location in the home.

Let s start at a base point. That translates to about 12 inches of insulation.