1 / 14

Deconstruction

Deconstruction. and Green Building. Waste Management Reuse and Recycling. Deconstruction – What is it?. Each year, as many as 100,000 residential buildings are demolished in the United States More than 8 tons of waste to landfill

bisa
Download Presentation

Deconstruction

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Deconstruction and Green Building Waste Management Reuse and Recycling

  2. Deconstruction – What is it? • Each year, as many as 100,000 residential buildings are demolished in the United States • More than 8 tons of waste to landfill • Wood, plaster and drywall, metals, masonry and other building materials • Deconstruction • Selective dismantling or removal of materials from buildings • Alternative to demolition • Reduces landfill; increases use of natural resources • Salvage higher value materials for reuse: • Wood flooring, Raised panel doors, • Ornate interior and exterior trim • Electrical and plumbing fixtures • Framing, Bricks

  3. Deconstruction – What is it? • Breaking down buildings, not destroying them • Preserving material for reuse • Reduce waste • Cost savings • Labor costs can be offset by lower equipment costs • Deconstruction does not require as much heavy equipment • Deconstruction relies primarily on hand tools and small machinery • Disposal costs are lower: reduce waste by up to 75% • Creates new ranges of employment opportunities • Environmental benefits of recyclable/reusable materials • Waste reduction • Conservation of natural resources • Significantly greater protection to the local site, including soil and vegetation

  4. Deconstruction – Challenges • Challenges • Use of modern day materials • Plywood and composite boards are difficult to remove • Gluing floorboards and using high-tech fasteners inhibit deconstruction • Asbestos-containing materials in older buildings or buildings that have been renovated • Can be found in pipe, duct, wall and ceiling insulation, ceiling tiles, roofing, siding, vinyl sheet flooring, wallboard, plaster and window caulking • Deconstruction takes longer than demolition • Long permit process for demolition often cuts into the time needed for deconstruction

  5. Deconstruction – Markets • Markets • Virgin heart lumber found in old building can be sanded down and refinished • Architects can use this wood and other reclaimed materials creatively in new construction • Also valuable to remodelers and historic preservationists restoring old buildings • Re-milling of wood for wood flooring

  6. Deconstruction vs. Demolition • Alternative to crushing and buying valuable building materials, deconstruction salvages • readily available components • additional materials • oak flooring, oak stair treads and structural timbers. • Deconstruction may cost 30%-50% less than straight demolition • Preliminary research by EPA and NAHB-Research • Developed with the Baltimore Development Corporation and the Housing Authority of Baltimore • Deconstruction disposal costs are lower • Reduces the amount of waste produced by up to 75%. • Deconstruction provides greater protection to the local site, including the soil and vegetation. • Deconstruction creates less dust and noise than demolition.

  7. Deconstruction Safety • Work-Site safety • Fall protection • Maintenance of structural integrity • Fire prevention • Often less important during conventional demolition • Hazardous materials, such as asbestos and lead • Sequence critical to prevent collapse of the structure • No formal procedures or standards exist for structural disassembly • All workers must be aware of critical supports, both existing and temporary • Fire avoidance even more important when building materials are stored on site • Keep the job site clean • Avoid unsafe working conditions • Maintain communication between workers or teams

  8. Deconstruction Safety • Nature of fall hazards in the workplace • Each deconstruction project new and unique hazards • Identify hazards during initial walk through • Hazardous materials • Commercial property owner should identify hazardous materials on the site prior to demolition or deconstruction. • Most common problems • lead paint • asbestos • underground fuel storage tanks • electrical transformers: PCBs.

  9. Deconstruction Process • Conduct a detailed inventory of how and of what the building is made. • Every component, its condition, and the manner in which it is secured impacts the cost-effectiveness of salvage. • Condition of wood rafters or the type of mortar impacts the value of the salvaged materials and/or the labor required • Detailed building material inventory • Includes invasive inspection of the structure • identify hazardous materials not available for inspection during a non-invasive inspection. • hazardous materials impact the feasibility of deconstruction • Throughout deconstruction process: • Remove any nails • Sort, clean, and stack the materials • Keep the job site as clean as possible • Avoid unsafe working conditions.

  10. Deconstruction Process • Deconstruction generally begins in the interior of the home or building. • Initial walk through and evaluation: materials inventory list • Identify all trim work, fixtures and fittings that are to be salvaged. • Cabinets, light fixtures, windows, doors (including glass, French, closet and rollup garage doors), tile, some carpet, hardwood floors • Roof – depending on the materials, this may or may not be salvagable • Walls – deconstructing a wall is almost the exact opposite of constructing • Floor – should be one of the final steps in the deconstruction process • If a raised floor, additional materials can be salvaged including floor joists, beams, girders and plywood • Tongue and grooved dimension lumber is highly salvageable

  11. Green Builder Program Components • Higher Energy Efficiency Standards • Exceed CA Title 24 by >15% • Resource Conservation • Wood • Engineered wood products • Certified wood products • Water • Outdoor + Indoor 20,000+ g/y • Waste Diversion and Recycling • BII protocols meet AB 939 • 50+% reduction in construction-site waste • 3rd Party Validation (All features)

  12. Water and Wood Conservation • CGB homes use 20,000+ gal less water than typical homes • Innovative plumbing systems and fixtures • New designs for landscaping and irrigation • Certified forest products • Engineered wood products

  13. Waste Diversion and Recycling • Divert at least 50% of construction wastes from landfills • Recycle cement, wood, drywall, and cardboard • Use engineered wood products to minimize on-site construction waste and save trees • Simple • Reduces landfill congestion • Cost effective

More Related