County of Tuolumne Building and Safety Division and TCBI Joint Training 2010 California Code Update Series Storm Water Prevention/Green Building Standards
Instructor: Doug Oliver, Chief Building Official • Course Intent: – To provide an overview of mandatory Residential Green Building Standards effective January 2011
Fast and Dirty • Rather than tell you how and why, …… – What: Residential Mandatory Measures. • Erosion Control Measures • Energy Efficiency • Water Efficiency • Construction waste reduction, disposal, and recycling • Building Maintenance and Operation • Environment Quality
Site Development - Residential • 4. 106. 2 Residential Projects less than 1 acre must manage storm water drainage during construction. – Retention basins – Conveyed to public drainage through filtered system – Compliance with County Erosion Control Ordinance • 4. 106. 3 Surface Drainage must be designed to keep surface water from entering the building. Intended also to aid in ground water recharge – – – Swales Water collection and disposal system French Drains Water retention gardens Other approved methods
Energy Efficiency – This section is essentially deferred to California Energy Code. Your energy consultant is the best source for performance based efficiency.
Indoor Water Efficiency, Applicable July 2011 • Builder must demonstrate 20% reduction in indoor water usage. Table 4. 303. 1/worksheet WS-4. • Builder Self Certified
Outdoor Water Usage • Must have compliant controller that has a weather delay.
Construction Waste • Mandated 50% reduction of construction waste – Exemption for land clearing, grading, and more restrictive ordinances • Waste Management Plan (see sample page 74) – – Materials diverted: recycle + reuse=diverted Sorted on site or at a facility Identify diversion facility Identify construction methods used to reduce construction waste. – Specify that the amount be calculated by weight or volume, NOT BOTH!
Waste Management Plan • Compliance documentation required continuously on site during construction. • Must ready available to inspector. • End document self certified given to inspector at final. • Enforcement agency make exceptions when site is outside haul boundaries of the diversion facility.
Building Maintenance Manual • Builder required to provide Operational Manual for the care and use of the residence including the following information: – Directions to owner or occupant that manual is to remain in the structure for the life of the structure
Manual Continued Operation/maintenance instructions for the following: – – – Equipment and appliances Roof and Yard Drainage Space Conditioning Systems Landscape Irrigation Systems Grey water Systems • Information from local utility on efforts to reduce resource consumption. Recycling programs etc. • Public Transport and Carpool Options • BUT WAIT THERES MORE!
Manual Continued • Educational material of interior relative humidity between 30 and 60% and what methods to use to maintain that humidity. • Information on landscape water conservation. • Instructions for maintenance of downspouts and gutters and the importance of diverting water minimum 5’ from foundation. • Information on required routing maintenance (ie: caulking, painting etc. ) • Information on State energy incentives. • Copy of all special inspection verification from construction
Environment Quality • Fireplace – Gas fireplaces required to be direct-vent/ Wood and pellet to be EPA phase 2 certified. • Pollutant Control– Ducts to be covered/sealed during construction. – Adhesives, sealants, caulks, paints, coatings, coverings to meet specific VOC limits. (See handouts)
• Formaldehyde limits Table 4. 504. 5 – – – Hardwood plywood veneer core. 05 PPM Hardwood Plywood composite core 0. 08 PPM Particleboard 0. 09 PPM Medium density fiber board 0. 11 PPM Thin-medium density fiberboard 0. 21 PPM
Interior Moisture Control • Slab Foundation Change – – 4” of ½” aggregate with vapor barrier in direct contact. • Slab designed by a licensed design professional. (heated slab? ) • Moisture content of wood 19% max before being enclosed. Verification Builders responsibility – Determine with probe or contact type moisture meter – 2 -4 foot from grade stamped end. – 3 random readings to be performed for walls and floors – Declaration to enforcement agency that testing was done and compliant.
Indoor air quality and exhaust • Bathroom (tub and shower room) exhaust fans to be energy-star rated unless used for whole house ventilation. • Humidistat required otherwise (adjust range of 50 -80% • Whole-house exhaust fans shall have insulated covers which close when fan is off. Insulation value R-4. 2
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