Under Art. 155 of the FC, while the family home shall be exempt from execution, forced sale or attachment, it may not be so except for:
(1) nonpayment of taxes;
(2) debts incurred prior to the constitution of the family home;
(3) debts secured by mortgages on the premises before or after such constitution; and
(4) debts due to laborers, mechanics, architects, builders, materialmen and others who have rendered service or furnished material for the construction of the building.
