One of the most expensive parts of the house to replace is the roof. At the same time, the roof is pretty important because it protects the rest of the house plus its contents. That is why you need to be on the lookout for early signs of an impending roof collapse, such as the following signs:
The Roof is Sagging
A structurally sound roof should not sag given the number of support structures a typical roof has. Therefore, if a roof is sagging, it means that it cannot handle the weight it is bearing. This may be the case if the roof support structures are damaged (maybe they are aging) or there is extra weight on the roof (like extreme snowfall).
There Are Signs of House Movement
A typical house is designed to work together to keep the house intact. That is why a change in one part of the house may affect other parts. For example, when the exterior walls start to buckle out, the damage may spread to the roof because the support they had been getting from the walls will reduce. Therefore, movements in different parts of the house may also precede roof collapse.
You are Hearing Unusual Sounds
A typical roof is heavy (to the tune of thousands of pounds), which is why it must be supported with strong. Therefore, if the roof structures are struggling under the overlying weight, expect to hear a pop there or a crack there. In fact, creaking or popping sounds from the walls or roof is an emergency situation; its best to move out of the house until a diagnosis is done.
Doors and Windows are Difficult to Operate
Doors and windows often become difficult to operate when the foundation is settling and the walls are being pushed out of their normal foundations. Therefore, if you find it difficult to close or open your doors or windows, you should suspect different types of structural damage, including a possible roof collapse.
Damage to Different Parts of the Roof
Lastly, damage to different parts of the roof may also herald impending roof collapse. Such damages include cracks in the ceiling, cracks on different parts of roof supporting structures (such as ceiling joists). In fact, visible cracks often mean extensive damage that must be diagnosed by a professional.
As you can see, few roofs collapse without warning; in most cases, the telltale signs are there but people just ignore them. Don't be one of those people whose roofs collapse "without warning," consult a roofing contractor as soon as you notice any of these signs.