▁the ▁manufact urer ▁has ▁records ▁of ▁exactly ▁what ▁quantity ▁of ▁materials ▁are ▁needed ▁for ▁a ▁given ▁job . ▁With ▁the ▁consist ency , ▁build ers ▁can ▁design ▁systems ▁that ▁use ▁common ▁lengths ▁of ▁l umber , ▁wall board , ▁etc ., ▁cut ▁items ▁with ▁maximum ▁efficiency , ▁or ▁be ▁able ▁to ▁order ▁special ▁lengths ▁in ▁bulk . ▁While ▁waste ▁from ▁a ▁site - built ▁dwell ing ▁may ▁typically ▁fill ▁several ▁large ▁dump sters , ▁construction ▁of ▁a ▁mod ular ▁dwell ing ▁generates ▁much ▁less ▁waste . ▁According ▁to ▁the ▁UK ▁group ▁W R AP , ▁up ▁to ▁a ▁ 9 0 % ▁reduction ▁in ▁materials ▁can ▁be ▁achieved ▁through ▁the ▁use ▁of ▁mod ular ▁construction . ▁Material s ▁minim ized ▁include : ▁wood ▁pal lets , ▁shr ink ▁wrap , ▁card board , ▁pl aster board , ▁tim ber , ▁concrete , ▁br icks , ▁and ▁c ement . ▁Environment ally ▁friendly ▁construction ▁process . ▁Mod ular ▁construction ▁reduces ▁waste ▁and ▁site ▁disturb ance ▁compared ▁to ▁site - built ▁structures . ▁The ▁controlled ▁environment ▁of ▁the ▁factory ▁allows ▁for ▁more ▁accurate ▁construction ▁while ▁allowing ▁the ▁extra ▁materials ▁to ▁be ▁rec yc led ▁in - house . ▁ ▁F lex ibility . ▁One ▁can ▁contin ually ▁add ▁to ▁a ▁mod ular ▁building , ▁including ▁creating ▁high ▁r ises . ▁When ▁the ▁needs ▁change , ▁mod ular ▁buildings ▁can ▁be ▁dis ass emble d ▁and ▁the ▁modules ▁re located ▁or ▁ref urb ished ▁for ▁their ▁next ▁use ▁reducing ▁the ▁demand ▁for ▁raw ▁materials ▁and ▁minim