Recent content by SairHeed

Many thanks for the clarification Stuart45; I erroneously thought that cross joints were the horizontal ones as they go across the way, d'oh! That also makes your post all the more pertinent to my problem now that I understand the lingo.

Thanks for your input Stuart45. In my case the verticals seem to be the problem. I put this down to the shiny end faces of the manmade Fyfestone blocks not being roughed or scratched before laying in place. The cross joints would appear to have the benefit of gravity pushing down on the mortar...

Thanks for your input, Woody. The water appears to be coming pretty early, long before saturation. I was hoping to make sure the pointing was tight before applying Antel StoneTone to reduce permeability

CORRECTION To avoid confusion, the RSJ referred to above is actually a steel lintel.

During driving rain water permeates the outer Fyfestone blockwork of a gable cavity wall, it then runs down the inside of the outside wall, tracks along an RSJ and drips into a downstairs window. I've stripped out the plasterboard from around an upstairs window and, with an endoscope camera into...