sentences:  Meanwhile, fiberglass and rockwool producers found it difficult to keep up with the demand for insulation from their customers.Due to complaints by retailers, contractors and consumers about price, safety and quality control problems, the federal government began enacting insulation standards beginning in 1978.There was a great concern that the growth in cellulose manufactures was leading to improperly or insufficiently treating insulation against the threat of fire even though reliable statistics on a national basis did not exist.