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
Peleș Castle and the only persons permitted on the property were maintenance and military personnel. Ceauşescu did not like the castle very much and rarely visited. In the 1980s, some of the timber was infested with "Serpula lacrymans". After the December 1989 Revolution, Peleş and Pelişor Castle were re-established as heritage sites and opened to the public. Today, Foişor Castle serves as a presidential residence. The Economat Building and the Guard's Chambers Building are now hotels and restaurants. Some of the other buildings on the Peleș Estate were converted to tourist villas and some are now "state protocol buildings". In 2006, the