Great outdoor extension, Timber deck, timber handrail, flyover insulated patio roof,ceiling fans and lighting. All this combined makes a great outdoor room. #deck #timberdeck Decking Calculator http://www.dekingdecks.com.au/decking-calculator/
Staircase Calculator- this website has calculators for all kinds of staircases including double helix spiral! Also has TONS of other conctruction calculators, basically the holy grail website for help with designing building plans!