If you are not sure whether your guitar has a cedar or spruce top, shine a light through the top. Spruce is more transparent. Redwood, Koa and Mahogany. Next time woods used for backs and sides. Here are some basic facts we'd like to share.
Guitars constructed of wood are like sponges - ie.
Overheating causes a guitar to give up moisture very quickly. In addition, the heat can soften glues, cause bridges to pull up. Be aware that when it gets cold outside, especially in the fall when it may be warm one day and freezing the next, we tend to turn up the heat. The subsequent rapid drying of the air can be bad for your guitar. It may give up so much of it's moisture so quickly that serious cracks can form.