How To Insulate A Flat Roof In Florida

If insulation is installed below the flat roof deck this is called a cold roof.

How to insulate a flat roof in florida.

Generally a rigid insulation board should be used as part of the roofing construction and may be applied over or under the roofing deck. Framed wall insulation must meet or exceed r 13. Framing this out and buying 30 r fiberglass insulation will cost you about 50 more than just buying 5 inches of polyiso equivalent of 30 r. Roof types the various types of roofs found on homes sheds garages and other buildings fall into one of the following categories.

In florida this often means heat is flowing from a warm outdoors to an air conditioned indoors. To produce a hot roof rigid insulation is fitted outside above the weatherproofing. Gable roofs hip roofs intersecting roofs butterfly roofs mansard. Some types of flat roofing material like metal also require insulation to help deaden the sound.

Then install r 30 fiberglass batts between the rafters. It should be installed on tapered 2x furring strips in order to slope the surface of the roof to drains. Insulation is rated in terms of its thermal resistance. Moisture penetrating your building materials will eventually compromise the integrity of your home.

Residential requirements for insulation are divided by the location in the home. A note to consider before construction. In a nutshell you would sandwich 130mm of solid insulation between two decks allowing to place a vapour barrier on top of the first deck. Many homeowners also prefer to use a type of insulation to help improve energy usage on the roof.

From there the flat roof system you choose will determine the materials you apply. Consider geography budget and use for the roof to determine the best option. Insulation material is placed on top of the roof rather than in between the ceiling and the decking. Cold roof systems are highly inadvisable as insulation from the inside will inevitably lead to the formation of condensation.

You would only do this however if replacing the roof covering on top and you have the height above the roof to do this. This is then covered with a further weatherproofing layer. Insulation is placed in between the joists underneath the roof surface above. Ceiling insulation must be much higher at r 30 and a raised floor must be at least r 13.

The type that is right for your flat roof insulation job depends upon the state of the roof expert opinion on the best type and your budget. For block walls interior insulation must meet or exceed r 7 8 and exterior insulation must be r 6. Spray foam insulation applied to your attic ceiling can reduce and prevent water damage caused by rain water. Insulation can reduce the amount of heat that flows reducing cooling and heating costs.

Water leaking into your home puts your home at risk for mold growth which then leads to misery and potential health problems. The correct method for a flat roof is under the current regulations to have a warm roof.