I'm having problems baking bread. Why does the baked loaf crumbles easily?

If your bread crumbles easily, it may be because of the following reasons:

• dough not well mixed;
• too little kneading;
• too much flour added;
• rising place too warm;
• dough allowed to rise too long; or
• oven temperature too low.

Barbara Willenberg, Nutritional Sciences, University of Missouri-Columbia.