Quinta San juan, Marbella
QSJ Private Wellness & Cinema
A radical transformation of an obsolete basement into a world-class leisure hub. Solving the engineering paradox of uniting a high-humidity Spa with a dry acoustic Cinema.
The Challenge
The Engineering Paradox
The client required two opposing environments in a single underground space: a High-Performance Spa (generating significant heat and humidity) and a Professional Cinema (requiring absolute dry acoustics and silence).
The existing basement was obsolete, featuring low structural clearance and lacking pre-installation for heavy MEP loads. The challenge was to execute massive demolition and structural reinforcement without compromising the luxury finish or affecting the upper floors of the residence.
This required surgical precision in demolition and a complete rethinking of the space's "invisible architecture"—ventilation, waterproofing, and sound isolation.
Invisible Infrastructure
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01
Acoustic Engineering
Implementation of a comprehensive "Mass-Spring-Mass" system using ACUSTIDAN, ROCDAN, and M.A.D.4 membranes. This created a "floating box" for the cinema, completely decoupling it from the structure to prevent vibration transmission.
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02
Wet Room Mastery
Construction of a custom-built jacuzzi and steam room with multi-layer technical waterproofing. We ensured zero leakage risks in a subterranean environment before applying the delicate handcrafted Zellige finish.
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03
HVAC Integration
Installation of 5 independent ducted AC units with AIRZONE linear grilles. The entire system was hidden within bespoke lighting coves to maintain aesthetic purity while managing the complex climate demands of a spa and cinema.
Noble Materials
Execution of complex finishes that require millimeter precision in handling and installation. The design by Pedro Peña demanded flawless transitions between materials.
Stone & Ceramics
- Marble: Calacatta Prestigio (Large Format 320x160cm)
- Stone: Travertino Alabastino & Sant Laurent (Polished)
- Artisanal: Handcrafted Zellige Tiles (5x15cm, 5x5cm)
Wood & Metal
- Flooring: GRATO Legend Timber (Hungarian Point pattern)
- Fittings: GESSI Antique Brass PVD
- Doors: Custom iron doors with extra-clear glass
DURAVIT ME & CATALANO Horizon
90 Recessed spots & 318m LED strips (2700K)
Lutron & KNX Integration
Noel & Marquet moldings, Acid-etched glass
BENJAMIN MOORE Stucco
Custom 1.80x1.80m Jacuzzi
Technical Conclusion
The result is a unique luxury basement in Marbella, where millimeter precision, technical craftsmanship, and exhaustive control by Realta Constructions place this project at an incomparable level on the Costa del Sol.
Technical Specifications
Engineering the Impossible
Transforming a basement into a high-performance wellness hub required reconciling two opposing forces: the extreme humidity of a Spa and the absolute silence of a Cinema.
We executed a radical structural intervention to integrate advanced systems without compromising the aesthetic purity of the design.
Acoustic Isolation
Cinema soundproofing via a “Mass-Spring-Mass” system using M.A.D.4 membranes to create a floating box effect.
Wet Room Mastery
Custom-built jacuzzi with multi-layer waterproofing, supporting the installation of intricate, handcrafted Zellige tiles.
Invisible Systems
Integration of 5 ducted AC units with AIRZONE linear grilles, hidden within bespoke lighting coves.
Noble Materials
Installation of large-format Calacatta Prestigio and GRATO timber flooring in Hungarian Point pattern.
testimonials
word FROM our happy resident
Excellent
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