House leaks/damp

Earthsharples

Been doing a fair bit of work at my elderly mother's house, but I'm more a landscaper come rustic furniture/shed builder, so any problems with bricks n mortar tend to leave me clutching at straws for solutions. I have 3 water/leak related problems. 

1 - The wallpaper above her uPVC front door has started to peel back and is wet underneath.  There is no pipework above this section of the house and given it was raining when I discovered the damp, I assume it is working its way around the edge of the door frame.  Is this likely to be a simple case of resealing the frame to the brickwork? If so, is there a recommended product? 

2.  Running from her boiler cupboard up to the bathroom directly above are various water pipes. The boiler was retrofitted back in the late 90s and so the pipework is hidden behind plywood masking (for lack of a better term). I notice that toward the bottom of of the plywood, beneath the boiler, there is signs of damp. The thin ply looks blistered.  This could well be historical, when my dad was alive they did have a leak that was apparently sorted, but I find it hard to believe he wouldn't have replaced the ply boards. The current boiler is only 6 months old. I suppose my question is, should I contact a professional, if so, who? This fits a plumbers remit, right? 

3. I've noticed some damp near the ceiling in one of the bedrooms. It is a dormer bungalow with flat roofing above the windows. Again, I'm guessing a need a professional roofer? 

Thanks for your help. 
A

Doozergirl

A picture speaks a thousand words, but on the face of it: 

1. silicon sealant if it's just around the very edges, otherwise you should check the condition of mortar pointing/render. 

2.  Is it actually wet? 

3. Yes, it sounds like the job for a roofer.