purlin

Hi, I have a purlin prop resting on a brick wall. Upon closer inspection the mortar joints on this brick wall is crumbling away - if you dig you nails in it starts to break away. The bricks arn't in great condition either. What would be the best way to fix this wall. I understand it could be...

Attached are several pictures of two Velux windows installed in June and then yesterday changed to follow the recommendation of Building Control for a Regularisation Application. I know nothing and am posting to see if anyone has any opinion about the structure in the picture. In particular...