توصیه های انتخواب سقف شینگل
Specific Roof System Selection Recommendations
Roof system selection can be complex and challenging. Selection should start with if the project is a new or existing roof. This step is necessary to proceed with proper system selection as it determines roof system type. New construction allows better choice in the roof system selection and should begin with designing steep slope systems >3 in./ft. when possible, followed by low sloped <3 in./ft. where required. Generally, when a building least dimension is 75′ or less, a steep-sloped system should be selected over a low-sloped system.
GUIDANCE FOR LOW SLOPE AND STEEP SLOPE SYSTEMS
- Extend Roof Lifespan
- Employ designers, suppliers, contractors, trades people, and facility managers who are adequately trained and have the appropriate skills.
- Select materials that are sold by manufacturers that provide robust technical support, training, and oversight of their products. Materials sold as commodities without technical support can lead to problems.
- Adopt a responsible approach to design, recognizing the value of the robust and durable roof.
- Provide effective drainage to avoid ponding. Utilize 1/2″ per ft. if possible. Use crickets to direct water to drains, depress drains in 4 ft. square sumps, 1-1/2″ deep.
- Raise perimeter base flashing seams and details up out of the main roof plane and out of standing water with tapered edge strips.
- Minimize the number of penetrations through the roof.
- Ensure that high maintenance items are accessible for repair or replacement.
- Monitor roofing works in progress and take corrective action, as necessary.
- Control access onto completed roofs to reduce punctures and other damage, providing defined walkways and temporary protections.
- Adopt preventative maintenance, including periodic inspections and timely repairs.
- Minimize Burden on the Environment
- Use products made from raw materials whose extraction is least damaging to the environment.
- Adopt systems and working practices that minimize waste.
- Avoid products that result in hazardous waste.
- Recognize regional climatic and geographical factors.
- Use products that can be reused or recycled, where possible.
- Optimize the real thermal performance, recognizing that thermal insulation can greatly reduce heating or cooling costs over the lifetime of a building.
- Keep insulation dry during construction to maintain thermal performance and durability of the roof.
- Consider embodied energy combined with energy savings over lifespan.
- Consider the roof surface color and texture with regard to climate and the effect on energy and roof system performance. A tool for doing this is the.
- Use local labor, materials, and services wherever practical to reduce transportation, although this a low consideration compared to how well they perform and if they save energy over the long term.