SDI Rolling
Steel Doors
Manufactured in-house in Canada by Service Door Industries. Three product lines built for years of trouble-free industrial and commercial operation.
Canadian
Made In-House
Every SDI door is manufactured in-house at their Mississauga, Ontario facility — ensuring quality control from steel slat to finished product.
Reliable
Trouble-Free Operation
Built with structural angle guides, steel plate brackets, and heavy duty cast throats for years of smooth, trouble-free performance.
Repairable
Easy Maintenance
Designed for fast, cost-effective repairs. Aluminum bottom bars and structural guides are more durable and easier to service than roll-formed alternatives.
Rolling Steel Service Doors
The backbone of SDI's lineup — rugged rolling steel service doors available in a wide range of slat sizes, gauges, and operations. G90 galvanized curtain and hood eliminates the need for painting. Versatile mounting options for any building configuration.
2" Slats
Flat or curved, 22 ga. steel
3" Slats
Flat or curved, 22/20/18 ga. steel
Finish
G90 galvanized — no painting required
Guides
Structural angle (more durable than roll-formed)
Bottom Bar
Aluminum (easier to repair)
Brackets
Steel plate (stronger than stamped)
Insulated Rolling Steel Doors
When temperature control matters. Solid insulation sandwiched between galvanized steel slats provides consistent density and complete insulating coverage — ideal for climate-controlled warehouses, food storage, and cold-weather buildings.
Slat Type
3" flat insulated, 22 ga. inner/outer
Insulation
Solid — consistent density, complete coverage
Finish
G90 galvanized, optional powder coat
Guides
Structural angle (more durable)
Bottom Bar
Aluminum (easier to repair)
Throats
Heavy duty cast (stronger than stamped)
Counter Doors
A clean and attractive solution for adding security to service counters, concessions, pharmacies, and retail environments. Compact 10" brackets on all sizes minimize headroom requirements. Available in grey prime or 180 standard powder coat colours.
Slat Type
2" flat, 22 ga. steel
Finish
Grey prime or 180 powder coat colours
Brackets
Compact 10" on all sizes
Springs
Oil tempered torsion, high cycle
Headplate
Includes end covers
Headroom
Minimal required
Built Different
Every SDI door shares these core engineering advantages — setting them apart from the competition.
G90 Galvanized
Curtain and hood require no further painting
Structural Guides
Angle guides more durable than roll-formed shapes
Steel Plate Brackets
More durable than stamped steel bracket plates
Cast Throats
Heavy duty — more durable than stamped steel stops
Aluminum Bottom Bar
More durable and easier to repair
Canadian Made
Manufactured in-house in Mississauga, Ontario
Mounting Options
SDI rolling steel doors are available in two standard mounting configurations to suit your building structure and opening requirements.
Face of Wall
Door mounts to the exterior face of the wall. Maximizes clear opening width. Standard for most commercial applications.
Models: F-prefix (FP, FC, FM, FCI, FMI)
Between Jamb
Door fits between the jambs of the opening. Clean appearance with concealed guides. Ideal when exterior mounting isn't possible.
Models: B-prefix (BP, BC, BM, BCI, BMI)
Why Choose SDI
Canadian Made
Manufactured in Mississauga, Ontario
Superior Components
Steel plate brackets, cast throats, structural guides
No Painting Required
G90 galvanized finish on all standard doors
Fast Repair
Designed for quick, cost-effective service
Built for Canadian Weather
Engineered for harsh winters and heavy use
Recent Installations
Professional SDI rolling steel door installations across commercial and industrial properties.
