Understanding the R-value of attic insulation is essential for Florida homeowners who want to keep their homes cool during hot summers and warm during cold winters. The R-value is a measure of the insulation's ability to withstand the heat that passes through it, and the higher the R-value, the better the thermal performance of the insulation. The recommended R-value for most parts of the country is between R-25 and R-38, while Florida's hot and humid climate requires an even higher level of insulation. Aerosol foams such as urethanes and polyicinene are available with R-values of 3 to 6 per inch, while polyisocyanurate (ISO plate), extruded polystyrene (XPS or slate), expanded polystyrene (EPS or cardboard) or other materials are generally found in the form of rigid cardboard with an R value of 4 to 7 per inch.
The best type of attic insulation for Florida's climate is closed-cell spray foam, which has an impressive R-value in the range of six to seven per inch. Blown fiberglass, blown cellulose, and fiberglass blocks are also suitable for Florida's climate. When installing insulation, it's important to make sure that the roof or walls can support any additional weight derived from the additional insulation before installation. Additionally, proper installation is just as important as choosing an appropriate R-value for your attic.
For more information on these insulating products and many more, see Insulating Materials. By understanding what R-value means when it comes to attic insulation, Florida homeowners can ensure that their homes remain comfortable all year round. Spray foam insulation is one of the most effective types due to its impressive R-value in the range of six to seven per inch, while blown fiberglass is another type that can be used in hot, humid climates like Florida's. Insulation has a highly recommended R-value of 2.5 reais per inch and is relatively inexpensive compared to spray foam insulation.
