Thermal Break
GKBM Anthracite Grey Double-Glazed Thermal Break Casement Window
- Wind Resistance: TS EN 12210 Class C5
- Thermal U-Value: 1.4 W/m²K (TS 825 Compliant)
- Profile Alloy: 6063-T6 Marine-Grade
Structural Fenestration Systems
High-Performance Architectural Windows & Doors for Istanbul Developments
Engineered to mitigate harsh Bosphorus channel vortexes, Marmara coastal storms (Lodos/Poyraz), and demanding Turkish seismic codes (TBDY 2018). Factory-direct custom fabrication dispatched directly to Haydarpaşa and Ambarlı container ports.
Bifold Acoustic
Exterior Soundproof Double-Glazed Hurricane Bifold Patio System
- Acoustic Rating: Rw 42 dB Noise Decoupling
- Watertightness: Class 9A (600 Pa)
- Threshold: Recessed Sub-Sill Drainage
Alu-Clad Wood
Aluminum-Clad Wood Soundproof Balcony & Villa Casement Windows
- Core Application: Bosphorus Historic Yalıs
- Glazing Spec: SentryGlas Laminated Impact
- Screen: Integrated Concealed Mesh
Cast Armor
Heavy-Duty Bulletproof Cast Aluminum High-Wind Resistance Pivot Door
- Security: Anti-Intrusion & Ballistic Core
- Bearing Load: German Hydraulic Floor Springs
- Finish: Fluorocarbon Baked Marine Coat
Patio French
French-Style Slim Frame Hurricane-Rated Sliding Patio Doors
- Design: Colonial/Art-Deco Slim Muntins
- Locking: Multi-Point Perimeter Deadbolts
- Weatherstrip: Dual Co-Extruded EPDM
Arched Heritage
European Vintage Arched Storm Casement Windows & Hotel Systems
- Style: Beyoğlu & Pera Revival Arched Tops
- Wind Rating: ASTM E1886 Missile Level D
- Sound Barrier: STC 45 Acoustic Interlayer
Heavy Sliding
Extreme Windproof Heavy-Duty Double-Glazed Lift & Slide Doors
- Seismic Drift: Interlocking Mullion Joint
- Glass Unit: 6mm Low-E + 16Ar + 6mm Toughened
- Capacity: 450 kg Per Sash Glide
Pleated Shield
High-Tension Pleated Insect & Dust Screen Door System for Villas
- Mesh Material: High-Tenacity Polyester Mesh
- Wind Track: Wind-Catching Interlock Guides
- Installation: Direct Surface/Pocket Integration
Engineering White Paper
Why Istanbul Demands Hurricane-Grade & Seismic Fenestration
Straddling two continents across the Bosphorus Strait and the Sea of Marmara, Istanbul presents a demanding microclimatic challenge: high gust speeds from the northeast (Poyraz) and southwest (Lodos), intense marine salinity, and stringent seismic requirements under the Turkish Building Earthquake Code.
Lodos & Poyraz Wind Load Dynamics
Istanbul’s microclimate alternates between extreme sub-zero Poyraz gales channeled down from the Black Sea and high-humidity, storm-force Lodos squalls from the Marmara Sea, frequently generating dynamic gust pressures over 2,400 Pa. Standard residential fenestration experiences frame racking, gasket whistle, and seal degradation. DERCHI hurricane-rated profiles are reinforced with internal multi-cavity titanium-aluminum alloy extrusions that deliver TS EN 12210 Class C5 structural rigidity, resisting frame deflection of up to L/300 under extreme vortex suction along high-rise building envelopes.
TBDY 2018 Seismic Drift Decoupling
Situated directly adjacent to the active North Anatolian Fault Zone, Istanbul architectural specifications enforce rigorous seismic inter-story drift limits under the Turkish Building Earthquake Code (TBDY 2018). Fenestration must absorb substantial lateral shear without glass shattering or frame blowout. Our engineering systems incorporate isolated perimeter anchor shoes, continuous flexible structural silicone pocket glazing, and multi-axis adjustable anchoring brackets that allow ±18mm building movement without transferring destructive stress to the impact-laminated glass panes.
Marine Salt-Fog & Humidity Barrier
Façades fronting the Golden Horn, Bosphorus, and Princes’ Islands face relentless sodium chloride exposure and airborne particulate corrosion. Standard powder coatings pit and blister within three seasons. DERCHI exports to Istanbul with minimum 25-micron Qualicoat Seaside Class 2 anodized or AkzoNobel 70% Kynar 500 PVDF fluorocarbon coatings. Accompanied by 316-grade marine stainless steel gearing, our assemblies pass 3,000-hour neutral salt-spray (NSS) test cycles, guaranteeing pristine operation in coastal environments.
Sarıyer · Bebek · Kandilli
Bosphorus Waterfront Heritage Yalıs
Historic waterfront properties require strict adherence to silhouette authenticity while demanding supreme wind, wave-splash, and dampness resistance. Our aluminum-clad wood and thermal break French arched windows harmonize historic woodwork elegance on the interior with weather-defying 6063-T6 aluminum shells externally.
Maslak · Levent · Ataşehir
High-Rise Penthouse Windbreaks
Skyscrapers located in Istanbul's business districts experience extreme vortex shedding at elevations above 100 meters. Our heavy-duty lift-and-slide doors and structural curtain casements incorporate laminated SentryGlas interlayers, preventing atmospheric pressure pop-out and eliminating howling wind whistles.
Kadıköy · Maltepe · Kartal
Urban Transformation (Kentsel Dönüşüm)
Under Turkey’s ongoing urban renewal mandate, aging concrete tenements are being replaced by earthquake-resilient luxury residential blocks. DERCHI partners directly with Turkish contractors, delivering containerized, pre-glazed, pre-hung window systems that slash site installation timelines by up to 40%.
Regulatory Trajectory
Istanbul Building Regulations & High-Efficiency Fenestration Trends
Understanding the confluence of Turkish Energy Performance Standards (TS 825), seismic structural design protocols, and modern acoustic comfort parameters.
TS 825 Thermal Envelope Transition (2nd Climate Zone)
Istanbul falls firmly into Turkey’s Region 2 climatic zone. Under recent regulatory tightenings for energy performance certificates (Enerji Kimlik Belgesi - EKB), overall building window-to-wall thermal transmittance (Uw) values are targeted below 1.5–1.8 W/m²K. Conventional uninsulated aluminum profiles are no longer viable for new permit submissions.
DERCHI solves this compliance hurdle by integrating imported Technoform polyamide PA66-GF25 thermal barrier struts ranging from 24mm to 34mm wide, engineered with multi-chamber aerogel and foam insulation inserts. Coupled with argon-gas-filled Low-E laminated glass, our systems achieve certified Uw metrics as low as 1.1 W/m²K, easily surpassing municipal thermal efficiency audits.
Acoustic Imperative: In high-density corridors like Beşiktaş, E-5 Highway, and coastal ferry lines, DERCHI’s acoustic asymmetric laminated glass (6mm Low-E + 1.52mm PVB Acoustic + 8mm Toughened) drops ambient urban noise by up to 45 decibels, creating quiet interiors in the heart of Turkey's bustling metropolis.
| Performance Metric | Turkish Standard Code | Standard Local Window | DERCHI Hurricane Grade |
|---|---|---|---|
| Wind Resistance | TS EN 12210 | Class B3 (1200 Pa) | Class C5 / AS 2047 N6 (3000+ Pa) |
| Watertightness | TS EN 12208 | Class 4A (150 Pa) | Class 9A / E1050 (600 - 1050 Pa) |
| Air Permeability | TS EN 12207 | Class 2 (300 Pa) | Class 4 Maximum Air Tightness |
| Seismic Inter-Story Drift | TBDY 2018 Sec. 7 | Rigid / Non-Flexible | ±18mm Seismic Anchor Decoupling |
| Impact Missile Test | ASTM E1996 / EN 356 | Untested (Standard Tempered) | Large Missile Level D (9-lb lumber) |
| Thermal Transmittance (Uw) | TS 825 Class 2 | 2.8 - 3.4 W/m²K | 1.1 - 1.4 W/m²K (Low-E Argon) |
Direct-from-Manufacturer Precision for Turkish Architects & Developers
Guangdong Dejiyoupin Doors and Windows Co., Ltd. (DERCHI) operates one of Asia’s largest specialized door and window industrial hubs in Foshan, China. Spanning 180,000 square meters with over 600 full-time technicians and engineers, we eliminate tier-two markups and inconsistent fabricator quality.
Our fenestration engineering is backed by more than 100 patents and formal global accreditations—including CE marking for direct European customs release, ISO 9001 quality management, UL fire-rated certifications, and Australia's elite AS 2047 N6 cyclonic testing protocol. We provide free shop drawings (AutoCAD and BIM Revit) customized to Turkish rough opening dimensions and facade structural deflection models.
CE Certified
ISO 9001:2015
AS 2047 N6 Certified
UL 10C Fire Rated
Qualicoat Seaside
AAMA/WDMA Impact Tested
Complimentary CAD Shop Drawings
Send your Turkish architectural elevation schedules. Our design office returns comprehensive structural profiles, anchor details, and seismic thermal-break schematics for engineering sign-off.
Istanbul Port Container Shipping
Direct logistics dispatch to Ambarlı Port (European side) and Haydarpaşa Port (Asian side). All units are packed in reinforced, fumigated steel-corner wooden export crates with moisture absorbers.
Time Zone Aligned Technical Support
Dedicated English- and bilingual-speaking façade engineers responsive throughout Istanbul construction business hours (GMT+3), ensuring zero communication bottlenecks.
10-Year Comprehensive Warranty
Complete structural backing covering aluminum extrusion integrity, multi-point lock hardware cycles (100,000 movements), surface finish resistance, and insulated glass hermetic seals.
Procurement Clarity
Frequently Asked Questions: Sourcing Hurricane Windows for Istanbul Projects
Key technical, legal, and operational considerations for Turkish general contractors, architects, and private estate developers.
How do your hurricane windows perform against Istanbul’s Poyraz and Lodos wind gales?
Istanbul faces severe gust vortexes, particularly during winter Poyraz storms off the Black Sea and autumn Lodos low-pressure fronts across the Sea of Marmara, which create wind speeds exceeding 130 km/h. Our hurricane windows are engineered to Australian AS 2047 N6 (the world’s most stringent cyclic cyclonic rating) and European TS EN 12210 Class C5. Using reinforced 6063-T6 multi-chamber aluminum extrusions with up to 3.0mm wall thicknesses, our assemblies withstand over 3,000 Pa of wind pressure without permanent frame deflection or seal blowout, eliminating wind howling and water ingress.
Are DERCHI window systems compliant with the Turkish Earthquake Code (TBDY 2018)?
Yes. Turkey's 2018 Building Earthquake Code (TBDY 2018) requires non-structural façade components to accommodate significant inter-story horizontal drift to prevent brittle glass shattering during seismic excitation. DERCHI systems utilize specialized seismic expansion perimeter clips, elastic high-recovery EPDM gasket pockets, and resilient Dow Corning structural silicone glazing. This design permits ±18mm of building deflection without inducing mechanical shear on the insulated glass units, safeguarding occupants from falling glass hazards.
What customs paperwork, CE marks, and shipping processes apply to Ambarlı & Haydarpaşa ports?
We regularly ship containerized door and window consignments to Istanbul’s premier deep-water container ports: Kumport/Marport in Ambarlı (European Side) and Haydarpaşa Port (Asian Side). Every export shipment includes full European CE Declaration of Performance (DoP) dossiers under EN 14351-1, ISO 9001 quality certificates, commercial invoices, packing lists, and certified mill test reports for aluminum profiles. Your appointed Turkish customs broker can efficiently process customs clearance via standard maritime transit documents.
How do your thermal break systems meet Turkey's TS 825 insulation standards?
Under TS 825 (Thermal Insulation Requirements for Buildings in Turkey - Region 2), overall window thermal transmittance values (Uw) must strictly control heating and cooling loads. Standard aluminum systems are thermal bridges. DERCHI windows feature multi-cavity glass-fiber reinforced polyamide (PA66-GF25) thermal breaks ranging from 24mm to 34mm wide. Paired with double- or triple-glazed argon-filled Low-E glass units with warm-edge spacers, our windows deliver certified Uw values ranging between 1.1 and 1.4 W/m²K, easily securing municipal energy performance certification (EKB).
Can your surface finishes withstand continuous salt air along the Bosphorus and Princes' Islands?
Standard architectural coatings rapidly oxidize, chalk, and pit when exposed to marine salt fog in seaside districts such as Bebek, Sarıyer, Kadıköy, and Büyükada. For our Istanbul shipments, we apply Qualicoat Seaside-certified electrostatic powder coating or 70% fluorocarbon PVDF coatings (AkzoNobel/PPG) with a minimum film thickness of 65–80 microns, alongside marine-grade Grade 316 stainless steel installation screws, hinges, and friction stays. These systems pass rigorous 3,000-hour neutral salt-spray exposure testing without corrosion.
How does the custom manufacturing and shop drawing verification process work?
Our process is tailored for overseas project execution:
(1) You provide your architectural plans, window schedules, and site opening dimensions (metric or imperial).
(2) Our in-house engineering department generates complete 2D/3D CAD shop drawings, detailing wall anchorage, threshold flashing, mullion structural moments, and glass schedules.
(3) Following your sign-off and color sample approvals, production commences in our ISO 9001 facility.
(4) Strict in-line quality controls inspect dimension tolerances (within ±1mm), air tightness seals, and hardware operation before crating in seaworthy timber packaging.