Our Expertise and Capabilities

Sumatera Timberindo Industry (STI) is one of the leading premium wooden door manufacturers in Indonesia, with over 25 years' experience in the timber industry.

Strategically situated in industrial town of Tanjung Morawa, North Sumatera, our 60,000 sqm factory has convenient access to the main international seaport in Belawan, and Kuala Namu International Airport.

We specialise in manufacturing Engineered Internal, External, and UK Certified Fire Rated Doors (FD30) as well as Solid and Finger Joint Laminated Merbau Balcony Doors. Our range of engineered doors are made with selected premium American Hardwood species such as White Oak and Walnut or in native Indonesian species such as Meranti. Our doors are also available Glazed with single-tempered, Double or Triple-glazing system under BSEN & ASN standards. We offer Pre-finished and White-Primed Doors. Our doors are exported to The United Kingdom, The Netherlands, Australia, and The Americas.

Within our facilities which consist of two production areas, two painting lines, and three warehouses, our dedicated team of more than 700 employees manufactures on average 20.000 doors per month.

Mission, Vision and Core Values

Mission : We are committed to produce the best quality doors for our customers around the world through the constant innovation.

Vision: To be one of the leading premium wooden door manufactures in South East Asia

Core Values

1. Customers Oriented

2. Quality Control

3. Research and Development

4. Professional Management


Accountable Quality Management System

To consistently deliver products with the "Quality is our Priority" motto in mind, we are committed to source high quality timber and veneers in manufacturing our exquisite doors.

STI is ISO 9001:2015 and FSC COC are certified by SGS and SVLK-FLEGT certified by SUCOFINDO Indonesia. We will continue to innovate and improve to accomplish our vision as the No. 1 premium wooden door manufacturer in Southeast Asia.

ISO 9001: 2015 Certification

SVLK Certification No. 75

FSC COC Certification

Fire Resistance Assessment
Global Fire Resistance Assessment FD30 (Flush&Panelled Doorset)


In our daily operation, through continuous research and department (R&D) efforts, we strive to produce and deliver the best quality doors. Our areas of R&D includes wood species, strength of each type of wood, strength of our glue, test on changes of depreciation caused by weather. We are also constantly upgrading our machine to achieve high accuracy production.

Our products have been exported to many countries such as: Netherlands, United Kingdom, Ireland, Australia, Caribbean Island and Asia.

Home Products Projects