![]() ![]() Thus, there is only a minor gain in heaping insulation on these walls and your return on investment drops off to almost nothing after a modest amount of insulation is added. The opaque portions of exterior walls just don't contribute that much to your energy use. Things like efficient hot water heaters and air conditioners, extra attic insulation and better infiltration packages make a HUGE difference your energy bill. That is because the opaque exterior walls just don't contribute that extensively to the overall energy use of the home. You can super insulate all you want but you will never recoup your investment with energy saving. The $ difference in Central and Northern portions of the State is even less because of the cooler evenings which makes the masonry thermal mass work better. This is for a 2000 sf one story home in Miami. The actual energy $ savings between the minimum R4 foil interior insulation and R20 super insulation is only about $100 per year (not per month - per year). Results from that testing are attached to this blog and clearly show that your typical foil interior insulation is the best value for money. We proved this with extensive research done at the Pacific NW Labs, one of the top energy research labs in the Country. The truth is that masonry homes require very little insulation in the Florida climate. Normally block walls are either painted, sealed or stucco'd on the outside and none of these adds any appreciable energy efficiency to the home. Our insulation blocks are widely used in government projects as well as private projects. This gives you a through wall insulation value for a typical block wall of R10 or an added insulation value of R7.8 (insulation value of the 3/4" board plus the insulation value of a 3/4" reflective air space). Therefore, a low U-Value is the key to saving the energy cost. The eight ties per block provide for easy attachment for virtually any interior or exterior material. ![]() This block features full length plastic ties located on 6' centers for unmatched strength and performance. 3/4" furring strips are then attached over the board and the drywall attached to the furring strips. The LiteForm® ICF 8' Straight Block with its patented folding design dramatically reduces handling costs and job-site space by up to 55. The board is glued or nailed to the inside face of the masonry wall with the foil face pointing inward. The maximum recommended insulation for Florida homes is a 3/4" polyiso board with a reflective side. Using a 1 5/8" furring strip rather then a 3/4" furring strip allows you to slightly increase your interior insulation value of the available foil products. The most common way to insulate your home in Florida is to use a foil type insulation spread between the furring strips on the inside face. ![]()
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