Architectural Aluminium Vertical Sliding Sash Window Catalog
Custom-manufactured high-performance sash windows configured for European commercial, historical, and luxury residential projects.
Uw ≤ 1.1
Thermal Transmittance (W/m²K)
Class E1050
Water Tightness Rating
Class C5
Wind Load Resistance
42 dB
Acoustic Noise Reduction
Structural Market Dynamics: Aluminium Vertical Sliding Sash Windows in Spain
Technical brief on architectural adoption, CTE compliance, and factory-direct export strategies for the Iberian peninsula.
The architectural fenestration landscape across Spain is undergoing a profound technical evolution. Historically dominated by traditional side-hinged casements (ventanas abatibles) and simple horizontal sliders, the Spanish architectural sector—spanning major urban hubs like Madrid, Barcelona, Valencia, and Seville—is experiencing a surging demand for premium aluminium vertical sliding sash windows (ventanas guillotina de aluminio). Driven by a dual requirement for space-optimizing functionality and historic façade preservation, real estate developers, contractors, and architectural importers are increasingly turning to specialized export factories for high-performance thermal break sash systems.
Unlike traditional timber sash windows that suffer from warping, swelling under Mediterranean humidity, and high lifecycle maintenance costs, modern extruded aluminium vertical sliding systems manufactured from 6063-T5 profile alloys offer structural longevity, ultra-slim sightlines, and unmatched weather resistance. By utilizing advanced polyamide (PA66GF25) thermal break technology, factory-engineered sash windows effectively bridge the gap between classic aesthetic heritage and the stringent energy efficiency directives mandated by the Spanish Technical Building Code (Código Técnico de la Edificación - CTE DB-HE).
Façade Preservation
Ideal for urban historic districts (such as Madrid's Barrio de Salamanca or Barcelona's Eixample), replicating traditional timber sash proportions without altering protected exterior aesthetics.
CTE DB-HE Compliance
Engineered to meet low thermal transmittance values ($U_w$) across Spain's distinct thermal climate zones (Zones A to E), minimizing solar gain in summer and thermal bridging in winter.
Structural Ergonomics
Precision-calibrated constant force coil spring balances or heavy-duty spiral balances enable effortless vertical sliding of sashes up to 120 kg per unit.
Localized Architectural Application Scenarios across Spain
Tailoring fenestration specs to Spain’s diverse microclimates, urban density, and coastal environments.
1. Coastal Mediterranean Villas & Resorts (Costa del Sol, Balearic Islands)
In high-salinity, high-UV environments like Marbella, Alicante, Palma de Mallorca, and Ibiza, fenestration systems face extreme atmospheric corrosion and intense solar radiation. Exported aluminium sash windows for these regions feature Qualanod-certified anodizing (≥ 25 microns) or Qualicoat Seaside powder coating to prevent filiform corrosion.
Furthermore, sashes are equipped with solar-control double glazing units (e.g., 6mm Low-E Toughened + 16Ar + 6mm Solar Control Clear), reducing the Solar Heat Gain Coefficient (SHGC / Valor g) to under 0.35 to maintain low cooling loads during intense Spanish summers.
2. Historic & Residential Renovations in Urban Centers (Madrid, Barcelona, Valencia)
Urban apartment renovations often face tight interior space constraints where traditional casement windows swing inwards and obstruct living space. Vertical sliding sash windows solve this spatial puzzle completely by operating strictly within the window frame plane.
To combat urban acoustic pollution in cities like Madrid or Barcelona, windows are customized with soundproof acoustic laminated glazing (e.g., 4.4.2 Soundproof PVB + 14Ar + 6mm Toughened Glass), achieving acoustic attenuation levels up to $R_w = 42\text{ dB}$, compliant with Spain's CTE DB-HR noise control guidelines.
3. High-Altitude Continental Regions (Castilla y León, Northern Spain)
Regions such as Burgos, Valladolid, and the Pyrenean foothills experience severe winter cold temperatures (Climate Zones D and E under CTE). Here, standard non-thermal windows lead to rapid interior condensation and massive heat loss.
Our OEM factory supplies multi-chamber thermal break aluminium sash profiles incorporating 24mm to 34mm wide reinforced PA66 polyamide strips. When integrated with triple glazing and warm-edge swisspacers, whole-window U-values drop to an extraordinary $U_w = 1.1\text{ W/m}^2\text{K}$, providing absolute thermal comfort during sub-zero winter nights.
4. Luxury Hospitality & Boutique Hotels
Boutique hotels across Andalusia and Galicia utilize customized aluminium vertical sash windows featuring tilt-in sash functionality (ventana guillotina abatible). This feature allows interior housekeeping staff to safely tilt both top and bottom sashes inward at 90 degrees for rapid glass cleaning from inside the room without requiring exterior scaffolding or specialized cleaning crews.
Technical Benchmark Matrix & Specification Standards
Comprehensive engineering metrics comparing standard vs. thermal break vertical sliding sash configurations for Spanish importers.
| Performance Parameter | Standard Aluminium Sash | Thermal Break Sash (PA66) | High-Acoustic Heritage Sash | CTE Compliance Standard |
|---|---|---|---|---|
| Thermal Transmittance ($U_w$) | 3.8 - 4.5 W/m²K | 1.1 - 1.6 W/m²K | 1.3 - 1.8 W/m²K | CTE DB-HE (Zones A-E Compliant) |
| Air Permeability | Class 2 (300 Pa) | Class 4 (600 Pa) | Class 4 (600 Pa) | UNE-EN 12207 |
| Water Tightness | Class 5A (200 Pa) | Class E1050 (1050 Pa) | Class 9A (600 Pa) | UNE-EN 12208 |
| Wind Load Resistance | Class C3 (1200 Pa) | Class C5 (2000 Pa) | Class C4 (1600 Pa) | UNE-EN 12210 |
| Acoustic Insulation ($R_w$) | 28 - 31 dB | 35 - 38 dB | 40 - 44 dB | CTE DB-HR / UNE-EN ISO 717-1 |
| Profile Alloy Spec | 6063-T5 (1.4mm wall) | 6063-T6 (2.0mm wall) | 6063-T6 (2.2mm heavy wall) | EN 755-2 / EN 573-3 |
| Glazing Capability | 5mm - 18mm Single/Double | 24mm - 38mm Double/Triple | 28mm - 42mm Acoustic Laminated | UNE-EN 1279 Glazing Standards |
| Balance Mechanism | Spiral Tension Balance | Heavy-Duty Coil Spring | Dual Block & Tackle Balance | Tested > 20,000 Cycles |
Key Fenestration Trends Shaping the Spanish Market
Market insights for distributors, project developers, and general contractors in Spain.
1. High Demand for Ultra-Slim Sightlines
Spanish architects are moving away from bulky 100mm+ frame profiles. Modern market demand favors minimal frame sightlines (interlock profile widths under 35mm), maximizing interior day-lighting while maintaining structural integrity against wind loads along the northern Cantabrian and southern Atlantic coastlines.
2. Colonial & Georgian Astragal Bars (Palillería)
Historic restoration grants in Spain require windows to respect original architectural designs. OEM exporters now provide internal decorative grilles or external stick-on astragal bars (palillería adherida) in customized geometric grids (2x2, 3x2, Colonial), combining vintage aesthetics with low-emissivity glass technology.
3. Integrated Insect Screening Solutions
Due to warm Mediterranean seasons, integrated vertical retractable flyscreens (mosquiteras enrollables integradas) have become a standard buyer requirement in Spain. Screen meshes made from high-clarity fiberglass or stainless steel slide smoothly within a hidden frame channel.
Manufacturing Supremacy & Direct Export Advantages
Why Spanish fenestration importers partner with VELTOR's specialized manufacturing hub in Foshan, China.
Sourcing high-caliber aluminium sash windows directly from our Foshan manufacturing base gives Spanish importers, dealers, and project contractors a decisive competitive advantage in pricing, technical customization, and delivery speed.
Precision CNC Machining & Automated Corner Crimping
Our 5-axis CNC machining centers route hardware slots, drainage weep holes, and corner mitres with sub-millimeter tolerances (±0.1mm). Hydraulic corner crimping combined with dual-component polyurethane corner sealant guarantees structural rigidity and complete watertightness under extreme weather conditions.
Custom Hardware & Balance Calibration
Every vertical sash window is custom-calibrated based on exact glass weight calculations. We utilize premium imported hardware—including Caldwell spiral balances, Truth hardware, and custom heavy-duty stainless steel sash locks—ensuring smooth, whisper-quiet sash operation tested for over 20,000 continuous opening cycles.
Strict 100% Pre-Shipment Quality Control
Prior to crating, 100% of finished window units are assembled on inspection rigs to verify dimensional accuracy, diagonal squareness, glass clearance, operating force, and paint finish adhesion. Detailed HD inspection photos and video records are issued to Spanish buyers prior to container loading.
Reinforced Export Packaging & Logistics
Windows are wrapped in protective anti-scratch film, corner-guarded with high-density EVA foam, and packed inside fully enclosed, fumigated ISPM-15 plywood crates. Crates are clearly labeled with floor and opening numbers to enable fast, seamless sorting on Spanish job sites.
Partner With a Leading Aluminium Sash Window Manufacturer
Direct factory prices, full technical CAD drawing support, and CTE-compliant thermal break window systems delivered directly to Barcelona, Valencia, Algeciras, or Madrid.
Frequently Asked Questions by Importers & Contractors in Spain
Expert answers addressing compliance, logistics, thermal performance, and custom engineering.
How do your aluminium vertical sliding sash windows comply with the Spanish Technical Building Code (CTE DB-HE)?
Our thermal break sash series incorporate high-grade 24mm to 34mm PA66GF25 polyamide insulating strips combined with double or triple Low-E argon-filled glass units. This configuration achieves total window U-values ($U_w$) ranging from 1.1 W/m²K to 1.6 W/m²K, comfortably exceeding the maximum allowed thermal transmittance limits across all Spanish climate zones (Zones A, B, C, D, and E) as specified in CTE DB-HE Table 3.1.a.
What surface treatment options are recommended for coastal locations in Spain like Costa Blanca or the Balearic Islands?
For installations within 5 kilometers of coastal shorelines (marine environments classified under C4/C5 ISO 12944 corrosion categories), we strongly recommend our Qualanod-certified anodized finishes (≥ 25 microns thickness) or Qualicoat Seaside powder coating. These treatments provide high resistance to salt spray corrosion, atmospheric humidity, and color fading under intense ultraviolet light exposure.
Can sashes be custom-made with tilt-in mechanisms for easy interior glass cleaning?
Yes. We offer dual-action vertical sliding sash systems equipped with tilt-in sash latches. By releasing the concealed side latches, both the top and bottom glass sashes swing inward at a 90-degree angle toward the interior room. This allows maintenance crews or homeowners in multi-story apartment buildings to safely clean exterior glass surfaces without needing ladders, scaffolding, or exterior cradles.
What is the minimum order quantity (MOQ) and container lead time for shipment to main Spanish ports?
Because every window is custom manufactured to specified architectural schedule dimensions, we support both project-based container shipments (20GP / 40HQ) and LCL orders for luxury villa projects. Production lead time after final shop drawing approval is typically 25 to 30 days. Ocean freight transit time from Foshan/Shenzhen to major Spanish ports such as Valencia, Barcelona, or Algeciras is approximately 28 to 35 days.
How do you ensure proper counter-balance calibration for large, heavy triple-glazed sashes?
Each sash balance mechanism—whether using constant force coil springs or adjustable spiral balances—is engineered specifically for the precise weight of the glass and aluminium sash profile assembly. Before factory assembly, our engineering software calculates exact sash weight (kg) based on glass thickness and dimensions, ensuring smooth, low-effort operating forces (< 30 N) that hold the sash firmly in any vertical position without slipping or creeping.
Do you supply architectural CAD shop drawings and BIM models for architect approval prior to production?
Absolute precision is our standard. Upon receiving your window schedule or floor plan elevations, our technical engineering office produces detailed 2D CAD shop drawings (DWG/PDF formats) and 3D cross-sectional details free of charge. Production begins only after formal sign-off on dimensions, profile series, glass spec, hardware color, and opening directions by the client or project architect.
Request a Comprehensive Technical Catalog & Direct Factory Quote
Whether you are sourcing for an upcoming historic building renovation in Madrid, a coastal residential resort in Málaga, or seeking an OEM manufacturing partnership for window distribution in Spain, our engineering team is ready to assist.
