Mercia Sherwood Harlow 4mx3m Insulated Garden Room

The Harlow Insulated Garden Room (4m x 3m) is the perfect modern outdoor extension—ideal as a garden office, gym, or studio. Featuring a bold geometric winged design, EcoQuilt insulation, double glazing, and a long-lasting EPDM rubber roof, this all-season garden room combines style with high performance. Built in the UK with sustainably sourced timber and customisable to your needs. 

Key Features

• 4m x 3m Contemporary Design – Compact and stylish, fits most garden layouts
• Year-Round Comfort – EcoQuilt multi-foil insulation in walls, roof, and floor
• Double-Glazed French Doors & Windows – Improve thermal performance and natural light
• 50-Year EPDM Rubber Roof – Long-lasting waterproof protection
• Electrical Ready – Concealed cable management with removable inner wall panels
• Secure Build – Durable construction with high-quality materials
• Double Skinned Walls (72mm) – Improved structural integrity and insulation
• Sustainably Sourced Timber – Manufactured in the UK with eco-conscious practices  

Specifications