What are the disadvantages of foam core board?

Foam core board, while lightweight and versatile, has several disadvantages. It is relatively fragile and can easily be damaged by moisture, heat, or heavy handling, leading to warping or crumbling. Additionally, it has limited structural strength, making it unsuitable for projects requiring significant durability or support. Lastly, foam core board can be more expensive than other materials for certain applications, such as standard cardboard or rigid plastic.