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GREATHOUSE FACTORY OVERVIEW
GREATHOUSE: Premium Aluminum Window & Door Systems — Direct from Manufacturer
Factory Direct · German Standards Certified · 8 Years Export Experience · 5-Year Warranty · DDP Delivery Available
Factory Direct, Transparent Pricing
Own production lines, no middlemen. Aluminum casement windows, sliding doors, and sunrooms — all custom-made with clear, itemized quotes. No hidden fees.
German Standards, Verified Quality
Manufactured to DIN specifications. Full CE certification. U-value as low as 1.1, sound insulation up to 45dB. 100% pre-shipment inspection with documented QC reports.
Proven Export Track Record
8 years serving European & Middle Eastern buyers. DDP door-to-site delivery available — customs clearance and full logistics tracking included. 98%+ on-time delivery rate.
Our Product Range
From energy-efficient window systems to custom-made conservatories – GREATHOUSE offers you the complete solution for your construction project.
Aluminium System Windows
High-performance windows with optimal thermal insulation and soundproofing. Perfect for residential and commercial projects.
Conservatories & Canopies
Individual constructions according to your requirements. Light-filled and energy-efficient.
Lift and Slide Doors
Heavy-duty systems for large openings. Smooth-running and secure.
Aluminum System Windows: Technical Excellence
Premium Features
Our aluminum windows combine cutting-edge material technology with thoughtful construction. The result: durability, energy efficiency, and minimal maintenance.
  • U-value down to 1.1
  • Sound insulation up to 45 dB
  • RC2 security hardware optional. German brand hardware (Roto/Siegenia) combined with Chinese manufacturing efficiency.
  • Powder coating in RAL colors
  • Slim frame profiles for increased light intake
Winter Gardens: Individual Architecture
Each winter garden is planned and manufactured according to your specific requirements. From the classic lean-to construction to the freestanding pavilion – we realize your vision with precise German engineering.
01
Individual Planning
Tailor-made construction according to your specifications and local conditions.
02
Structural Analysis
Certified structural analysis and load calculations according to German building standards.
03
Thermal Break
Optimal thermal insulation through multi-insulated profile systems.
Transparent Pricing
At GREATHOUSE, you receive fair prices directly from the manufacturer – no middlemen, no hidden costs. All prices are ex-works, including quality control.
Standard Conservatory
from ＄120 / m²
Custom dimensions & planning
  • RAL-coated aluminum profiles
  • Double-glazing
  • Sliding door element
  • Gutters & drainage
Premium Window Set
from ＄150 / m²
Price per square meter (wall opening)
  • Triple-glazing
  • RC2 security hardware
  • Powder coating of your choice
  • Includes assembly instructions
Lift-and-Slide Door
from ＄180 / m²
High-performance system (price per m²)
  • Heavy-duty runner system
  • Burglary-resistant locking
  • Thermally separated profiles
  • Barrier-free floor track

Note: Prices are guideline prices for standard configurations. We would be happy to provide individual quotes based on your specific requirements. Shipping and customs costs are calculated separately. DDP service available (Delivered Duty Paid) – We deliver directly to your construction site, customs cleared.
Your path to the perfect product
From the initial inquiry to delivery, we guide you professionally through all project phases. Our structured process guarantees quality and on-time delivery.
Consulting & Planning
Free initial consultation and technical planning. We create detailed CAD drawings and quotes according to your specifications.
Order Confirmation
After your approval, we begin production planning. You will receive a detailed order confirmation with a delivery date.
Production & QC
Manufacturing under strict quality control. Every element is checked and documented – in accordance with DIN standards.
Packaging & Shipping
Professional export packaging for protection during transport. We organize the complete logistics to your construction site.
Support & Warranty
After delivery, we are at your side for technical questions. 5-year material warranty included.
Technical Documentation & Certificates
As a professional exporter, we provide you with all necessary technical documentation, helping you meet the requirements of German building regulations.
Available Downloads
  • CE Declarations of Conformity
  • Structural Calculations
  • Thermal Insulation Certificates (U-values)
  • Sound Insulation Certificates
  • Material Certificates for Aluminium
  • Installation Instructions (DE/EN)
  • Maintenance Recommendations
  • Product Data Sheets

For Professional Planners: We are happy to send you detailed CAD files (DWG/DXF) and technical data sheets upon request. Please contact our technical support. In cooperation with certified glass specialists.
Contact & Consultation
GREATHOUSE
Your direct line to us – we look forward to your inquiry. Our team provides professional advice on all technical and commercial matters.
Point of Contact
Flex Wan
Sales Director
We are happy to advise you in German and English.
Quick Contact
WhatsApp: +86 13376296858
Availability: Mon-Fri 8am-6pm
8
Years of Experience
Export expertise
5
Year Warranty
On all materials
100%
DIN-Compliant
According to German standards
GREATHOUSE – Aluminum Systems
High-quality windows, doors, and conservatories for demanding construction projects.
Imprint
GREATHOUSE
Owner: Denghao Wan
No.141, Sanbao Street
Changzhou city
Jiangsu 213000 China
Business Registration Number (China):
91320404MAK1YT4B4C
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© 2026 GREATHOUSE. All rights reserved. All prices are exclusive of VAT. Subject to change and errors.