Techniques for warming building materials, such as shingles and siding, are provided. In various implementations, a cover is positioned over building materials and secured in place. The cover at least partially defines an interior space in which the building materials are located. The cover is then connected to a mechanical heating device. The mechanical heating device is activated to provide heat to an interior space. At least some of the building materials are removed from the interior space and used in a building project. In various implementations, the mechanical heating device is activated about twenty-four to forty-eight hours before the materials will be used.