Introduction: B.J. Smith and A.V. Turkington; Quantification of the decay rates of cleaned and soiled building sandstones M.E. Young, J. Ball and R.A. Laing; Durability and rock properties R.J. Inkpen, D. Petley and W. Murphy; The use of image analysis for quantitative monitoring of stone alteration V. Lebrun, C. Toussaint and E. Pirard; Mechanisms of attack on limestone by NO2 and SO2 G.C. Allen, A. El-Turki, K.R. Hallam, E.E. Coulson and R.A. Stowell; Weathering of sandstone sculptures on Charles Bridge, Prague: influence of previous restoration R. P ikryl, J. Svobodova and D. Hradil; Experimental weathering of rhyolite tuff building stones and the effect of an organic polymer conserving agent A. Torok, M. Galos and K. Kocsanyi-Kopecsko; Chemical composition of precipitation in Krakow: its role in salt weathering of stone building materials W. Wilczy ska-Michalik; Interpreting the spatial complexity of decay features on a sandstone wall A.V. Turkington and B.J. Smith; Arkose 'brownstone' tombstone weathering in the Northeastern USA T.C. Meierding; Weathering of Portuguese megaliths - evidence for rapid adjustment to new environmental conditions G.A. Pope and V.C. Miranda; Influence of anthropogenic factors on weathering of the Carpathian flysch sandstones W. Wilczy ska-Michalik and M. Michalik; Observations on stepkarren formed on limestone, gypsum and halite terrains D. Mottershead and G. Lucas; The role of mechanical and biotic processes in solution flute development D. Mottershead and G. Lucas; Weathering scales, landscapes and change: some thoughts on links R.J. Inkpen.