Earth Pledge Green Roofs Initiative
Supporting the creation of green roofs upon New York City's flat rooftops. Includes rationale, research, projects, workshops, and resources.
http://www.earthpledge.org/GreenRoof.html

Historic Slate Roofs
The repair, replacement, and maintenance of historic slate roofs by Jeffrey S.Levine. Includes a history of slate use, further reading and repair and replacement guideline .
http://www.neslate.com/Levine.html

Proof Industries
Preassembled Bay Window Roofs & Bow Window Roofs... - The Proof is in the Roof
http://www.proofroof.com/

ProfileVent
Ridge vent for commercial and residential metal roofs.
http://www.profilevent.com

GreenProducts.net
The biobased revolution has dramatically affected commercial, industrial and government-funded businesses. Biobased products come from agricultural materials like corn, and they are providing environmentally minded individuals with effective alternatives to petroleum-derived products. In fact, the term biobased may soon be as common as
http://www.greenproducts.net/

Litec Srl
Manufacturer of aluminium truss, roofs, and towers. A Gruppo Manfrotto Company.
http://www.litectruss.com/

LIDC: Green Roofs
Includes design plans, specifications, costs, and maintenance.
http://www.lid-stormwater.net/greenroofs/greenroofs_home.htm

Vision Group
Glazing specialist manufacturers and suppliers of glass roofs, rooflights and curtain walling.
http://www.visiongroup.co.uk/

Birdair
Tensioned membranes can be used to construct roofs, free standing buildings, skylights and accent enclosures.
http://www.birdair.com/

SnoBlox-SnoJax
Snow Guards by SnoBlox SnoJax. Metal Roof Snow Guards and Plastic Snow Guards: Call 800-766-5291. Quantity discount and wholesale prices on all Snow Guard Products.
http://snoblox-snojax.com/