I think I know the answer to this, but I would really like some second opinions.
First question, can having stuff in your loft be the cause of damp or any kind of rotting issue with the roof timbers? The 'Stuff' is old furniture, clothes, toys, cardboard boxes, carpet, fairly normal stuff to have in a loft. The loft is partially converted and the floor is insulated, however no insulation on the actual roof whatsoever literally just tiles.
The loft is well ventilated, its cold and you can feel wind from outside, and birds can get in it somehow. There are some small 'holes' and at least 2 places where it leaks fairly consistently when it rains - this is the cause of the damp isn't it?
Second, the cellar has bare walls which have been painted, the paint is blistering and crumbling off with what looks like dust on it most of the time, the door that leads outside has all but rotted away, it is covered with a variety of different molds which seems to just about be holding the door together. Does this seem like a warning flag for rising damp? Extra information, there is a large 100 year old (ish) tree about 1 meter from the external wall growing at a 45 degree angle to the house (I'm pretty sure there is a problem with the foundations and tree roots)
And lastly, the house is rendered, in places where the rendering has cracked (I mean large cracks) and been left for some time inside there are patches of mold inside. On one side of the house in particular, rooms upstairs and downstairs (actually above the section of cellar with the rotting door) are damp and have to constantly wiped down to get rip of mold building up, for example, one room clearly used to have a window that has been filled in, and in that general region the wall is moldy. Is this rising damp or penetrating damp?
To me, the general disrepair of the house is the cause of all this damp not the act of just living in it, am I right?