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Four Season Sunroom

Deslano Year-Round Sunroom Solutions

Deslano manufactures fully insulated four-season sunroom systems engineered for commercial developments, contractors, distributors, and high-end residential projects worldwide.

15+ Years of Export Manufacturing | ISO 9001 Certified | Shipped to 100+ Countries

● Factory-Engineered Sunroom Systems

● Custom Structural Design

● Insulated Aluminum Construction

● Worldwide Project Supply

● Technical Installation Guidance

    Request Project Quote
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    Compare Our Sunroom Systems

    4-Season Sunroom 3-Season Sunroom
    Wind Load Rating Class 4 Class 3
    Air and Water Tightness EN 12207 Class 4 / EN 12208 Class 9A EN 12207 Class 4 / EN 12208 Class 9A
    Suitable Climate Zones All climates, including cold/continental regions Mild to temperate climates only
    Warranty Coverage 10 years 10 years
    Long-term Property Value Increases year-round habitable living space Adds seasonal living space at a lower upfront cost
    Maintenance Level Low cost Low-to-moderate cost

    Visit our three-season sunroom page to view further comparison information →

    Deslano-sunroom-in-Czech-Republic

    Series 150 Sunroom — Restaurant Entrance Enclosure, Czech Republic (Year-Round Outdoor Dining Space)

    Core Structural Technologies for Year-Round Performance

    A four-season sunroom is designed as a thermally controlled architectural extension rather than a seasonal enclosure.

    Its year-round usability is achieved through integrated structural engineering, insulation systems, and high-performance material selection.

    Unlike lightweight seasonal structures, an all-season sunroom maintains stable indoor conditions across temperature fluctuations, wind exposure, snow loads, and moisture changes.Our systems can also be configured as modular sunroom systems​ for efficient project delivery.

    Year-round performance is delivered through a fully integrated system including:

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    Insulated Wall and Roof Assemblies

    Multi-layer insulated structures engineered for thermal stability, structural load resistance, and long-term durability.Multi-layer insulated structures engineered for thermal stability, structural load resistance, and long-term durability：Panel thickness: 2mm | Thermal transmittance (U-value): 1.6W/(m²·K) | Snow load rating:0.5kN/m²
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    High-Performance Energy-Efficient Glazing

    Double or triple-layer insulated glass systems are designed to reduce heat transfer while maintaining daylight performance：Glazing options: Double/Triple IGU, Low-E coating, Argon fill | UV blocking: 95% | Wind pressure rating: Level 12 typhoon
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    Thermal-Break Aluminum Structural Profiles

    Advanced aluminum framing systems with thermal separation technology to minimize condensation and energy loss：Profile series: 120 / 150 | Frame depth: Decide based on the actual situation | Wind resistance certified to 180 mph/km/h
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    Advanced Sealing Technology

    Multi-layer sealing mechanisms protect against wind infiltration, moisture penetration, and extreme climate conditions：Air Permeability: Class 4 (EN 12207) | Watertightness: Class 9A / E1200 (EN 12208)
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    Engineered Components, Built for Performance

    • Deslano Frame Options

      Frame Options

      • * Profile Series 120 / 150 — Series 120 main beam span: <4.3m; main beam thickness: 3.0mm (suitable for medium-sized projects). Series 150 main beam span: <5m; main beam thickness: 3.5mm (suitable for medium-to-large projects).
      • * Frame Finishes — Available in Any color and surface material
    • Deslano sunroom Roof Types

      Roof Options

      • * Roof Types — Flat / Gable / Arched / Irregular-shaped
      • * Roof Panel Construction — 3mm insulated panel with structural reinforcement
      • * Optional Glass Roof Panels — for maximum natural light
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      Glass Options

      • * Standard Insulated Glass — Double-pane，Float glass
      • * High-Performance Glazing Upgrade — Low-E coated
      • * Tempered Safety Glass — all glass tempered as standard
    • Deslano Hardware & Sealing

      Hardware & Sealing

      • * Locking System — Two-point bolt locking system
      • * Weatherstripping — Multi-layer seal system for draft and water resistance
      • * Door & Window Rolling System — Equipped with ball-bearing rollers featuring nylon tires
    What Is an All-Season Sunroom

    What Is an All-Season Sunroom

    An all-season sunroom is a fully enclosed living space designed for year-round use, regardless of climate conditions.

    It is built with insulated aluminum structures and high-performance glass systems, allowing it to function as a true extension of the indoor space.

    Unlike seasonal enclosures, a four-season sunroom maintains stable indoor comfort throughout spring, summer, autumn, and winter — making it suitable for daily living, relaxation, and commercial use.

    Compared with three-season sunrooms​, our four-season sunroom offers enhanced structural strength, airtightness, and insulation performance. It withstands temperature changes, wind, rain, and heavy snow for stable year-round use while allowing flexible interior expansion.

    Compare with Other Sunroom Systems

    Who This System Is Designed For

    Engineered for professionals, developers, distributors, and long-term residential users seeking reliable year-round performance.Explore our full sunroom product range covering different structural and insulation levels for residential and commercial projects.Looking to become a distributor, explore OEM options, or view our certifications? [Learn more →]

    • Builders / Contractors

      Engineered systems reduce on-site complexity, improve installation efficiency, and ensure reliable project delivery.

    • Distributors / Dealers

    • Property Developers

    • Commercial Project Owners

    • Homeowners Planning Long-Term Living

    Application Scenarios

    Adaptable to a wide range of residential and commercial environments.High-performance projects often require engineered sunroom systems tailored to specific climate and architectural conditions.

    Terraces & Balconies
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    Terraces & Balconies

    Structured extensions for elevated platforms and compact urban layouts.
    Backyards
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    Backyards

    Freestanding or attached systems for residential and developer projects.
    Pool Areas
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    Pool Areas

    Enclosed solutions engineered for humidity and temperature control.
    Garden Landscapes
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    Garden Landscapes

    High-transparency structures integrated into outdoor design.
    Leisure & Pavilion Spaces
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    Leisure & Pavilion Spaces

    Four-season usability for hospitality and commercial operations.
    Porches & Entryways
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    Porches & Entryways

    Weather-protected transitional spaces with structural stability.

    Is an All-Season Sunroom the Right System for Your Project

    Different sunroom systems serve different structural and climate needs.Many four-season applications use thermal-break aluminum sunrooms combined with insulated glazing for improved year-round comfort.

    Here’s how to determine whether an all-season system is the right choice.

    Custom Design & Engineering Solutions

    "All customization requests are supported by our in-house engineering team with CAD drawings and structural calculations provided before production."

    • ▸ Size & Layout Customization

    • ▸ Roof Structure Options

    • ▸ Door & Window System Configuration

    • ▸ Climate Control Integration

    • ▸ Project-Level Engineering Design

    Engineering-Driven Project Workflow

    A clearly defined project workflow designed to reduce uncertainty, streamline coordination, and ensure stable system delivery worldwide.

    • Consult

      Consult

      Define your project needs

    • Design

      Design

      Match the right system solution

    • Quote

      Quote

      Engineering-based pricing

    • Produce

      Produce

      Stable manufacturing & delivery

    • Support

      Support

      Installation guidance & after-sales support

    Start Your All-Season Sunroom Project with Confidence

    Work directly with Deslano’s engineering team to receive a tailored system solution and project-based quotation designed for long-term performance.

    Request a Custom Quote

    Frequently Asked Questions About Four-Season Sunrooms

    Clear answers to the most important structural, pricing, and project-related questions.

    • How much does a sunroom cost?

    • Can the sunroom be fully customized?

    • What’s the difference between a four-season and a three-season sunroom?

    • Is an All-Season Sunroom Suitable for Cold Climates?

    • Who Is Responsible for Installation?

    • What warranty does Deslano offer?

      We provide complete installation drawings and step-by-step video instructions to support the entire installation process. With clear guidance and standardized components, the system can be installed by local contractors or experienced installers without specialized training.
      10-year warranty on frames, 5-year warranty on glass, and 5-year warranty on hardware.