03-15-2010, 03:11 AM
Here is a draft copy of the new building code which will take effect in May, 2010. http://bcap-energy.org/files/Hawaii-Stat...6-IECC.pdf
Walls must be insulated to a factor of R-13. No exceptions.
Roofs must be either insulated with R-19 or be certified as a cool roof. This can be done using radiant barrier or a white roof material which meets certain requirements. Every house I have built in the last 6 years in Hawaii meets this code with no fiberglass insulation.
In any case, all of this will now need to be calculated by an architect or engineer. Pricing for stamping plans are sure to rise. There will also need to be more inspections--insulation, radiant barrier.
There are some changes for windows. Jalousies must now meet a code for air infiltration.
In rooms with no air conditioning, ventilation openings must now total 14% of the square footage of the room. This means more or larger windows than before.
Single pane windows are still allowed. (A minimum fenestration U-factor of 1.2 is required. Single pane windows have a u-factor of around 1.04)
Bedrooms and living rooms must have electrical boxes installed for ceiling fans.
Replying to Maud: Why do you think that fiberglass is toxic? Do you have any valid scientific evidence to support your assertion? I am curious.
Walls must be insulated to a factor of R-13. No exceptions.
Roofs must be either insulated with R-19 or be certified as a cool roof. This can be done using radiant barrier or a white roof material which meets certain requirements. Every house I have built in the last 6 years in Hawaii meets this code with no fiberglass insulation.
In any case, all of this will now need to be calculated by an architect or engineer. Pricing for stamping plans are sure to rise. There will also need to be more inspections--insulation, radiant barrier.
There are some changes for windows. Jalousies must now meet a code for air infiltration.
In rooms with no air conditioning, ventilation openings must now total 14% of the square footage of the room. This means more or larger windows than before.
Single pane windows are still allowed. (A minimum fenestration U-factor of 1.2 is required. Single pane windows have a u-factor of around 1.04)
Bedrooms and living rooms must have electrical boxes installed for ceiling fans.
Replying to Maud: Why do you think that fiberglass is toxic? Do you have any valid scientific evidence to support your assertion? I am curious.