Rising Damp out of the house with a 'flea in his ear', defending Alan, apparently because Rigsby was offended the man assumed Rigsby to be Alan's father. Alan is immature and Rigsby does become something of a strange father figure for him. Philip Smith (Don Warrington) is a second generation British African from Croydon, although for most of the series he claims to be an "African Prince" and the son of an African tribal King. Philip's lies about his 'primitive' background seem most obviously an ironic response to Rigsby's ignorant remarks, and sometimes result in moments when Rigsby's gullibility and desperation lead
Damp (structural) salt accumulations still persist. This suggests that rising damp is not always the cause for the water penetration. The Building Research Establishment (BRE) in its review concludes that rising damp is a real problem. According to Jurin's law the maximum height of rise is inversely proportional to the capillary radius. Taking a typical pore radius for building materials of 1 µm, Jurin's Law would give a maximum rise of about 15 m, however, due to the effects of evaporation, in practice the rise would be considerably lower. A physical model of rising damp was developed by Christopher Hall and William