Mijas Costa, Costa del Sol · 2024
Infinity Pool Mijas
Project Overview
A complete pool and terrace transformation at a Mijas Costa villa — from a cracked, algae-stained concrete pool and broken paved terrace to a 9×4 m infinity edge pool with cobalt blue Ezarri glass mosaic, a 280 m² travertine-effect porcelain terrace, and a frameless glass balustrade that preserves the unobstructed Mediterranean sea panorama. The new Astralpool LED RGB underwater lighting system allows the pool colour to be changed by app, from cool blue to amber. The full hydraulic, filtration and pool automation system was designed by our pool engineer for minimal maintenance.
Initial Survey & Engineering Brief
The original pool — a 6×3 m rectangular pool built in the early 1990s — had developed multiple structural cracks in the shell, leaking approximately 200 litres per day. The terrace paving was heavily cracked with tree-root heave under the old concrete, and the original steel balustrade was structurally compromised by corrosion. A full structural survey by our pool engineering partner assessed the shell: ground-penetrating radar scans revealed the reinforced concrete was sound but the internal render coating (the waterproof layer) had failed along three crack lines. The decision to completely demolish and rebuild was driven by the scale of the infinity edge specification: a true overflow infinity pool requires precise levelling of the overflow blade to ±0.5 mm across its full length — not achievable by repairing an existing structure. The new pool dimensions — 9×4 m, 1.4 m uniform depth — were the maximum achievable within the licensed terrace footprint.
Technical Specifications
Material Selection at the Showroom
The showroom session for the pool and terrace materials was a two-visit process. For the pool mosaic, the client needed to see the tile in water — the colour of glass mosaic changes dramatically between dry and wet. We arranged for four mosaic colour samples (cobalt blue, midnight navy, tropical turquoise, and pearl white) to be installed in a test basin in our showroom, with water, so the client could evaluate the actual wet appearance. The Ezarri Iris Niagara 5×5 cm cobalt blue iridescent glass mosaic was chosen for its vivid aquamarine colour in sunlight and deep cobalt at night. For the terrace, the client chose Porcelanosa Troya Beige 60×120 cm outdoor porcelain — a travertine-effect tile with a natural fossil-stone texture, anti-slip R11 rating, and a warm sandy colour that complements the pool mosaic without competing with it. The frameless glass balustrade was chosen over alternatives (stainless posts with glass infill, stainless wire) because it provides a completely transparent boundary — from the dining table, nothing interrupts the sea horizon.
Technical Specifications
Demolition & Pool Shell Construction
Demolition of the existing pool shell took 4 days using a tracked mini-excavator and hydraulic breaker. The old terrace paving and its concrete sub-base were removed over the same period, exposing the natural soil sub-grade. The new pool excavation was then taken to 1.9 m below finished terrace level to accommodate the shell thickness, the balance tank below the infinity edge, and the structural slab. The new shell is 350 mm reinforced concrete (C30/37) cast in two pours — floor slab first, then walls — with a Penetron crystalline waterproof additive mixed into the concrete at 1 kg per 100 kg cement ratio. This integral waterproofing provides a first layer of protection within the concrete structure itself, before any applied coating. The overflow balance tank (10,000 L, cast in situ below the pool terrace) captures the overflow and recirculates it via twin pumps. The overflow blade — the critical element of the infinity effect — is a 9 m length of 6 mm grade 316 stainless steel levelled to ±0.5 mm using laser levels and adjustable threaded supports before the coping tiles are fixed.
Technical Specifications
Pool Mosaic, Coping & Hydraulics
The Ezarri Iris Niagara glass mosaic was applied to all pool surfaces (walls and floor) in mesh-backed 300×300 mm sheets using Mapei Kerabond T white polymer-modified adhesive — the white adhesive is essential with glass mosaic to ensure the tile colour reads true rather than being darkened by grey adhesive showing through. The mosaic was applied by two specialist tilers over 8 days; the overflow blade area required particular precision as the mosaic must follow the blade exactly and the final top-edge row of mosaic sits level with the water surface. Total pool internal tiled area: 99 m². The coping tiles (Botticino limestone 60×30 cm) were bedded on a sulphate-resistant mortar, with all joint widths matched to the terrace paving at 5 mm. The hydraulic system comprises: 2 × Pentair IntelliFlo3 variable-speed pumps (1.5 kW, 40 m³/h capacity each), Hayward Pro-Series 500 mm sand filter, UV-C disinfection unit (Zodiac 55 W) and saltwater chlorination (Hayward AquaRite 40g/hr). Pool automation is via Fluidra Connect — the client controls pump schedules, water temperature (heat pump), lighting colour scenes and chemical dosing via a single smartphone app.
Technical Specifications
Terrace, Balustrade & Landscaping
The 280 m² terrace was resurfaced with the Porcelanosa Troya Beige 60×120 cm outdoor porcelain laid on a screed over the existing substrate (repaired and reinforced where tree-root damage was found). All tiles were laid with a 3 mm open joint filled with flexible polyurethane sealant — this allows the terrace to move seasonally without cracking — and the large-format runs were interrupted with expansion joints every 6 m. The frameless glass balustrade was installed on the terrace perimeter: Tfix base-fix channels set into the concrete edge, receiving the 10 mm fully toughened safety glass panels (1.1 m high) without any visible post or top rail. Recessed LED step lights (IP68, warm white 3000 K, Bezel in marine grade stainless steel) were embedded into the risers of all terrace access steps — 16 lights in total. The terrace landscaping used drought-resistant Mediterranean planting: lavender, rosemary, agave and dwarf olive trees in Portuguese limestone planters, requiring no irrigation beyond the first establishment season.
Technical Specifications
How We Work With You
Every Magnum Reformas project begins with a free site visit from a dedicated project manager — no obligation, within 48 hours of enquiry. We provide a fully itemised fixed-price quote: every line of work is listed, nothing is hidden. Once approved, our team manages every trade on site so you never coordinate subcontractors yourself. A dedicated WhatsApp group keeps you updated with photos and videos throughout. At handover, we walk you through every installation and leave you a full documentation pack.
Technical Specifications
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