Bolueta towers is a project for 361 social housings in Bilbao. It´s formed by two buldings, with 28 and 21 stories each, with 171 and 190 housings. It was Passivhaus certified in 2018, and its still the tallest Passivhaus building in the world, with it´s 88m tall. 

The main challenge was to achieve the standard, under the Bilbao weather parameters, but with the usual economic ratios for social housings of the Basque Government. This meant a very tight budget, and also a lack of specific products for the construction. After 6 years, there are in the Spanish market many construction products, for Passivhaus buildings, but back in the day no. This made the architects, engineers and builder, to think and design together many of the details to improve the efficiency, with the stated low budget.

Team:

Architects: VArquitectos

Promotor: Visesa

Engineering: Grupo JG

Builder: Construcciones Sukia

Materials Used:

Facade cladding: Aluminium composite, Alucoil. 
Windows: Schuco Living
Ventilation: Zehnder
Airtightness: Onhaus with Siga
Insulation:  Rockwool