IRETSA, S.A.

Waterproofing and structural rehabilitation

IRETSA, S.A. is a Spanish contractor specializing in waterproofing, injection, and structural reinforcement for public infrastructure and industrial projects. Its work aims to restore structures’ designed strength and watertightness through a combination of assessment, intervention, and verification.

Technical specialties

The company organizes its work into six specialties:

• Waterproofing: tanks, cisterns, clarifiers, digesters, dams, canals, and EPDM/PVC roofs, using certified liquid-applied materials.
• Injection: stopping water leaks, sealing, and consolidating concrete structures with in-house-developed techniques.
• Structural repair: beams, columns, roofs, stairs, and pipe reinforcement using carbon-fiber systems.
• Corrosion protection: conditioning and passivating pipes and metal structures in water and industrial facilities.
• Joints: AMEX joints, PVC joints, and elastic expansion joints in water and civil-engineering works.
• Synthetic resins: anchoring, flooring, and repair products formulated in-house, with application testing in the company’s laboratory.

History and capabilities

IRETSA was founded in 1973 with the backing of Swiss IRETE technology. In 1977, the Spanish group took over financial control, retained technical assistance, and developed its own products and methods. In 2004, it participated in the UNE 104309 standards committee for pipelines, dams, and tanks. The company holds ISO 9001 and ISO 14001 certifications and has its own laboratory in Arganda del Rey, Madrid.

Selected projects

Documented projects include work for Aguas del Añarbe at the Loiola wastewater-treatment plant’s No. 1 thickener and the sand filters and No. 1 treatment line at the Petritegi drinking-water plant; work on Reservoirs No. 1 and No. 2 for Aguas de Burgos; Pontón de la Oliva Dam; the Line 7B Metro tunnel in Madrid (UTE Cotodisa-Saglas); El Atazar Bridge; Sages wastewater pumping station; Titulcia Bridge; and Puente la Reina Bridge. Work has included rehabilitation, waterproofing, full structural restoration, column repair and passivation, and structural repair.

Location and contact

Hours: Monday–Friday, 8 a.m.–5 p.m.

• Address: C/ Bronce 15, Pol. Ind. Finanzauto, 28500 Arganda del Rey, Madrid, Spain.
• Phone: 918 710 511.
• General email: iret@iretsa.es.
• Laboratory email: laboratorio@iretsa.es.