BUILDING MATERIAL MANUFACTURING APPARATUS AND BUILDING MATERIAL MANUFACTURING METHOD

[Problem] To provide a building material production apparatus and building material production method suitable for efficiently producing building materials while limiting clogging of a sieve for screening a building material feedstock. [Solution] This building material production apparatus is provided, for example, with a sieve 10 and a receiving means 30. The sieve 10 comprises a receiving/feeding sheet 11 without sieve openings onto which a building material feedstock M is dropped and below this sheet, at least one sieve sheet 12 with sieve openings. The receiving/feeding sheet 11 and the sieve sheet 12 are capable of undulating movement, are inclined, and are ranged in the direction of inclination. The receiving means 30 is for receiving the building material feedstock M that has passed through the sieve openings of the sieve 10. In this building material production method, for example, while the receiving/feeding sheet 11 and at least one sieve sheet 12 are undulating, a building material feedstock M is dropped onto the receiving/feeding sheet 11 and moved from atop the receiving/feeding sheet 11 to atop the sieve sheet 12, sieving is performed by the sieve sheet 12, and the fraction that has passed through the sieve openings of the sieve sheet 12 is accumulated on the receiving means 30 to form a mat of at least one layer.