The only "fifteen-year" rule in the Civil Code

All provisions below are taken from the Civil Code of the Philippines. The Civil Code of the Philippines is the product of the codification of private law in the Philippines. It is the general law that governs family and property relations in the Philippines. It was enacted in 1950, and remains in force to date with some significant amendments. SOURCE: Civil Code of the Philippines. From Wikipedia, the free encyclopedia. https://en.wikipedia.org/wiki/Civil_Code_of_the_Philippines

The provision below is one taken from the law on torts and damages. It speaks of the liability of engineers or architects in case of collapse of a building or structure. Article 1723. The engineer or architect who drew up the plans and specifications for a building is liable for damages if within fifteen years from the completion of the structure, the same should collapse by reason of a defect in those plans and specifications, or due to the defects in the ground. The contractor is likewise responsible for the damages if the edifice falls, within the same period, on account of defects in the construction or the use of materials of inferior quality furnished by him, or due to any violation of the terms of the contract. If the engineer or architect supervises the construction, he shall be solidarily liable with the contractor.

Acceptance of the building, after completion, does not imply waiver of any of the cause of action by reason of any defect mentioned in the preceding paragraph.

The action must be brought within ten years following the collapse of the building.