The new State Building Code, planned for adoption in the fall, could cost residential and commercial builders more time and more project money. A draft of the code hasn\u2019t been published yet, but building inspectors across Connecticut have some idea of what\u2019s being kicked around because they\u2019ve been taking classes on the proposed changes. Wilton building official Bob Root said he\u2019s been attending these classes for two years now, and he thinks the new code will \u201ctighten up\u201d energy requirements and, in some areas, affect what products builders use. \u201cIt all depends on how the state adopts it,\u201d Root said, but as far as he can tell, \u201cchanges to the energy code are probably going to be the biggest ones for cost. \u201cBuilders may have to use a different air barrier \u2014 a different thickness of insulation,\u201d he said. This would mean that \u201cmore care \u2014 and more time \u2014 would be needed to install house wrap and window wrap so air doesn\u2019t leak out [during testing].\u201d \u201cThe number of air-changes per hour in a dwelling, in other words, how much air is expelled and changed in a dwelling \u2014 how much fresh air goes in and out \u2014 will go from, I think, seven to two and a half changes per hour, so [energy requirements of] all houses would be tightened up,\u201d Root continued. \u201cThat\u2019s pushed by the Department of Energy. They want to reduce the amount of energy people need to heat and cool and light their homes.\u201d Residential builders could also have to pay for blower door tests \u2014 additional testing they are not now required to do. \u201cThe new code will probably require blower door tests for new homes,\u201d Root said. \u201cThat\u2019s when they seal all the openings in a house and put a blower door on the front door and reduce pressure in the house and see how much air comes in the windows and other openings.\u201d If the code gets adopted as it\u2019s being written now, Root continued, residential builders may also have to install drywall on the basement ceilings of homes where the first-level floor is made of engineered lumber, because engineered lumber \u201cburns a lot faster than old dimensional lumber,\u201d such as two-by-tens or two-by-fours. \u201cIt\u2019s basically to protect from fire,\u201d he said. Information Other potential building code changes include \u201csome changes on where ground faults are needed, arc faults are needed, different kinds of circuit protection,\u201d Root said. \u201cI\u2019ve taken a number of classes on the electrical and energy code changes, but I haven\u2019t really taken many on mechanical or plumbing,\u201d he added. If there are mechanical and\/or plumbing code changes being proposed that would increase commercial and\/or residential project costs, he does not yet know about them. While the office of the state building inspector\u2019s website points to this fall for adoption of the new State Building Code, Root said, \u201cyou never know.\u201d \u201cLast time we had a code change coming, we were led to believe it was going to be in May or June, and it got pushed to March 1, and we only heard about it in December,\u201d he said. The new State Building Code will be a supplement of Connecticut-specific items built onto the International Code Council\u2019s 2012 Family of Codes. It will also reflect the National Fire Protection Association\u2019s 2014 National Electrical Code.