Decra Roof Systems:
Roof coverings using lightweight roof tiles for all roofs down to a ten degree pitch. UK.
http://www.decra.co.uk/

Roof Genius
Roof calculator, calculates a detail list of roof materials, and a complete estimate. Two ways to determine roof pitch. Offers tips and how to's on roofing. [Windows 95/98/2000/Me/XP/NT]
http://roofgenius.com/

Invisible Heating Systems (UK) Ltd.
UK. Design, manufacture and install underfloor heating, geothermal heat pumps, road energy, solar, and wind powered heating systems. Includes technical information, products and contact information.
http://www.invisibleheating.co.uk/

Dallas Metal Products, Inc.
Providing all you're metal products and metal roofing products since 1989
http://www.dallasmetalproducts.com

Rayotec Ltd.
Rayotec (UK) are leading supplies of Electric Underfloor Heating, Warm Water Underfloor Heating, Solar Heating Panels, and Photovoltaic Electric Solar Electricity Panels.
http://www.rayotec.com

Warm Corporation
USA. Retailers of water based radiant heating systems. Includes solar pool heating systems, snow and ice melting systems and company information.
http://www.warmfloors.com/

TJ's Plumbing and Heating Inc.
TJ’s Radiant Heat Plumbing and Heating provides air conditioning and Snow Melting in Boston Massachusetts and New England
http://www.tjsradiantheat.com/

Radiant Energy Systems, Inc
Radiant Energy Systems, OEM, Gas Infrared, Hot Air Impingement Dryer, Ink jet dryers, Radiant round heaters, radiant heat, IR, convection, heating drying systems, control panels, radiant energy, industrial ovens, process heating, web drying, infrared heaters, Infrared Ovens, Hot Air Annealing Oven, Solvent coatings, water-based adhesives & coatings, solvent adhesives & coatings, silicone adhesive & release chemistries, powdered & web adhesives, custom paper converting, film converting, foil converting, packaging materials, silicone release liners, automotive interiors, woven & non-woven textiles, powder coating, flat panel heaters, Ink Jet Printer Dryers, Tunnel Heaters, tunnel ovens, tempering ovens, through air dryers
http://www.radiantenergy.com/

Shelter Products North West
USA. Retailers of radiant floor heating systems using hydronic heating. Includes design and support, product information, residential and commercial heating and online shopping.
http://spnwsupply.com

Menzies Metals
manufacturer & distributor of building products: stock flashings, steel building flashings, steel building products, ventilation products, plumbing, flashings, heating flashing
http://www.menzies-metal.com