Spritputs. Hantverklig analys av påslag och brukssammansättning

Abstract

A large number of older buildings are plastered with roughcast by hand. Since these facades have need for maintenance and repair it is important that the knowledge of the craft of roughcasting by hand is properly documented, especially considering most of plastering today is being sprayed on mechanically. The existing literature lacks detailed descriptions of how to apply a roughcast by hand, information on the consistnency of the mortar and how the aggregate/sand contained in the mortar can be graded in order to obtain the desired result. Furthermore there is no information on how these factors impact on one another. For example, if the sand contained in the mortar has a certain fraction, then what kind of consistency should the mortar have and in what manner should it be applied. The objective of this study is to try to answer the questions above and thereby add to the knowledge of roughcasting by hand. The results may be of value to those who seek further knowledge about roughcasting, especially in cases where there is a need to put together your own mortar. The study was made through a series of practical tests conducted in the training facilities of the university of Gothenburg in Mariestad.