Cov qhov rooj hluav taws hauv tsev feem ntau yog ua los ntawm cov ntoo, lub qhov rooj ncej yog ua los ntawm cov khoom siv tiv thaiv xeb-pov thawj, thiab lub qhov rooj ntoo yog nruab nrog perlite board. Cov qhov rooj ntoo hluav taws yog ua los ntawm cov hluav taws kub-resistant thiab nplaim hluav taws-retardant shed rubber strips, thiab sab hauv thiab sab nraub qaum yog them nrog cov khoom zoo nkauj thiab hloov tau yooj yim.