Serpula (fungus) are formed. The strand mycelium of "Serpula", which can be up to 8 mm thick, are invasive and can spread over non-nutritive surfaces to find new food sources, even spreading through pores in stone, brickwork, and cement. After its initial growth period, the fungus can produce the water it needs and can continue growth into dry timber, eventually degrading it to powder—hence the term "dry rot". "S. lacrymans" is the most serious cause of building timber decay in the UK and northern Europe. The "Dictionary of the Fungi" (10th edition, 2008), suggests that the genus contains two species. , the
Society for the Protection of Ancient Buildings Society for the Protection of Ancient Buildings The Society for the Protection of Ancient Buildings (SPAB) (sometimes known as Anti-Scrape) is an amenity society founded by William Morris, Philip Webb and others, in 1877; to oppose what they saw as destructive 'restoration' of ancient buildings then occurring in Victorian England; 'ancient' being used in the wider sense of 'very old' rather than the more usual modern one of 'pre-medieval'. Morris was particularly concerned about the practice, which he described as 'forgery', of attempting to return functioning buildings to an idealised state from the distant past, which often involved the removal