|Insulated Concrete Forms (ICF)||<– Date –> <– Thread –>|
|From: Thomas Lofft (tloffthotmail.com)|
|Date: Thu, 7 Jan 2016 10:05:09 -0800 (PST)|
ON Date: Wed, 6 Jan 2016 10:39:27 -0500 From: Miranda Castro <mirandacastro [at] aol.com> Subject: [C-L]_ Insulated concrete forms Miranda wrote: Hi All I am curious as to whether any cohousing group has used "insulated concrete forms? in the construction of their homes - or researched this and decided not to and if so why. Thanks so much Miranda Hi, Miranda et al.: At Liberty Village, MD, http://www.libertyvillage.com there was one home built with ICF (Insulated Concrete Forms) which is now 15 years old. I witnessed the construction, but was neither the builder nor the project manager, however, I do now own the home. I have otherwise watched the development and use of this technology and consider it very beneficial. However, I'm not sure how its current cost balances against all its benefits. Local construction costs will depend upon both material and labor typical local cost variables. Benefits: It creates a very airtight structure, It's very highly resistant to external noise; It's well insulated and totally air infiltration resistant except at openings for doors, windows and utilities which must be well sealed; It's insulation levels can be upgraded by thicker ICF's at the onset. The roof structure may be conventional framing or trusses with structural insulated panels (SIP's) used for roof structure. Constraints: It requires a very well trained and experienced crew and manager to be well constructed; Like any other construction it is still totally dependent upon knowledgeable soils testing and foundation construction; Effective use for a PassivHaus would still require high insulation values for doors and glazing, possibly triple glazed; I expect long term value will be very high, offsetting possibly higher initial expense. Similarly, this house was also developed with Ground Source Geothermal Heat Pumps for Heating & Air Conditioning (HVAC). These also added front end expense in 2000, but very high value long term benefits with HVAC operating expenses less than 50% of comparable fossil fuel costs. I personally believe strongly in making front end investment for long term value, so I have added photo-voltaic (PV) panels to the rooftop. In this case, the house was planned for perfect southerly roof orientation and all roof penetrations were avoided. In 2014, 36 - 255 watt PV panels were added for a 9.2 KW DC system, eliminating any electricity cost from last May through this month. The house is about 2,400 sq. ft. on 2 levels, with three baths, four bedrooms, 2 kitchens, 2 living-dining areas. It is currently used as an upper and lower level duplex, and has an attached 1 car garage. It is now offered on the local real estate market for $385,000, including a 30,000 sq. ft. lot. All inquiries are invited. http://www.realtor.com/realestateandhomes-detail/9158-Liberty-Village-Way_Union-Bridge_MD_21791_M55665-62139 Tom Lofft Liberty Village, MD
Insulated Concrete Forms (ICF) Thomas Lofft, January 7 2016
- Successful PV System on Common House [was Insulated Concrete Forms] Chris ScottHanson, January 11 2016
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