Fibro has long been in the shadows, but today cutting-edge architects around the world are returning to fibro - now asbestos-free - as a cheap and versatile building material. At last fibro is being recognised as a part of our architectural heritage. The Fibro Frontier looks at fibro in all its glory, from the holiday shacks, genteel bungalows and fun fairs of the past, to the international airports and award-winning houses of today.