Lack of understanding or care for your building can lead to disastrous consequences as can be seen in these photographs from a recent survey.
These show that cement render was used to 'prevent' water entering the stonework. It may have reduced it being absorbed through the walling for a time but when it continued to enter via the miryad routes it was prevented from evaporating out again so it saturated the stonework and began to destroy the sandstone below. This stone will have sat happily exposed for its first 100 years then the first cements would have been used to begin its decay.
It can all be repaired, at a cost, but it would have been better to have been left exposed and repaired like-for-like. No-one considered the effects of cements on traditional buildings back then but we are reaping the rewards now. There is sufficient knowledge and expertise nowadays to understand the mechanisms of decay and dampness and to repair and mitigate the effects.
Welcome note from me.
I am new to bloging, I talk a lot and write a lot but sharing daily exploits I usually avoid. Let's see how this develops. Your help is much appreciated.