Article 687 of Civil Code

1 - If the contract for work terminates upon the contractor's death, his heirs shall be entitled to a proportion of the remuneration corresponding to the work performed, without prejudice to their right to the value of materials remaining at the work site upon the contractor's death, if suitable for use in completing the work. 2 - The employer may demand delivery of the other materials prepared and the drawings whose execution has commenced, provided that he pays fair remuneration for them. 3 - These provisions shall also apply if the contractor begins performing the work and then becomes unable to complete it for a reason beyond his control.