A prehung steel exterior door quote is comparable only when the door unit and the surrounding project are described separately. Unit size and handing are only the beginning. The opening, wall depth, threshold and floor levels, water path, jamb and trim, hardware and glazing, required performance, removal and repair, installation, verification, and exclusions all affect the real scope.
This guide supports custom-project conversations. It does not confirm that Senmit currently offers a specific prehung steel door, configuration, threshold, hardware set, rating, certification, warranty, or installation service.
The ten-row prehung door scope matrix
| Scope row | Evidence to include with the quote request |
|---|---|
| 1. Unit and handing | Door count, slab and frame concept, swing, handing, active leaf, viewing direction, and sketches |
| 2. Opening | Width and height at multiple points, diagonals, plumb, level, square, and photos |
| 3. Wall construction | Framing or masonry, wall thickness, jamb depth, interior and exterior finishes, and structural repairs |
| 4. Threshold and floors | Interior and exterior elevations, landing, slope, accessibility goals, and finish transitions |
| 5. Water path | Exposure, overhang, drainage, sill pan and flashing design responsibility, and wall-layer integration |
| 6. Jamb and trim | Frame profile, brickmold or exterior trim, casing, returns, sealant joints, and color |
| 7. Hardware and glazing | Lock preparation, closer or panic needs, hinges, access control, glass, screens, and supplied-by-others items |
| 8. Performance and labels | Project-required energy, structural, water, air, impact, fire, accessibility, or other evidence |
| 9. Removal and installation | Demolition, disposal, repair, setting, fastening, flashing, sealing, trim, touch-up, and protection |
| 10. Verification and responsibility | Submittals, field measurement, approvals, testing if specified, warranty, exclusions, freight, and final acceptance |
1. Name the exact door unit you are requesting
State whether the request is for a single door, pair, door with sidelites or transom, replacement unit, or new opening. Show the proposed swing and handing from a clearly stated viewing side. Identify which leaf is active for a pair. Attach a simple sketch rather than relying on abbreviations alone.
Also state whether “prehung” means a complete door-and-frame unit for this quote and which hardware, trim, threshold, glazing, finishing, and accessories are expected. Different sellers may include different boundaries under the same label.
2. Measure the opening and describe its condition
The Steel Door Institute's SDI-135 guide to measuring existing openings calls for multiple width and height measurements and documents other existing-frame conditions. For a custom quote, provide multiple measurements, diagonals, photos, wall depth, and observed plumb, level, and square conditions. The project team must decide how those observations translate into an ordered unit and installation allowance.
Separate the rough opening, existing frame opening, masonry opening, and desired finished clear opening. They are not interchangeable dimensions.
3. Record wall depth and finish interfaces
Identify wood framing, cold-formed framing, concrete, masonry, or other construction; interior finish thickness; exterior cladding; and whether the existing frame or trim is embedded in surrounding materials. Photograph both lower corners, jambs, head, and adjacent finishes.
Ask who owns concealed damage, corrosion, rot, missing support, out-of-square work, masonry repair, and finish restoration discovered during removal. Put an allowance or change-order process in writing.
4. Coordinate threshold, floor, landing, and drainage
Show interior and exterior finished-floor elevations, rugs or flooring transitions, the landing, slope away from the opening, nearby drains, roof runoff, and exposure. Identify accessibility goals and any required clearances for the actual project. Do not select a threshold from appearance alone.
The U.S. Department of Energy's fully flashed window and door opening guidance describes a lapped approach in which side flashing relates to pan flashing and top flashing relates to side flashing. The project detail still must follow the selected door instructions and actual wall assembly.
5. Define jamb, trim, hardware, and glazing
List jamb depth and profile, exterior trim or brickmold, interior casing, returns, sealant joints, finish, and color. For hardware, state the lock or latch function, preparation, hinges, closer, panic hardware, access control, door contact, kick plate, viewer, weather seals, and items supplied by others. Only include what the project needs.
For glass, record privacy, safety, energy, appearance, and other project requirements without assuming a generic lite satisfies them. Request written confirmation for the selected configuration.
6. State required performance evidence before selection
Project location, use, occupancy, exposure, wall system, and local requirements can change the documents needed. Ask the designer or authority having jurisdiction to identify required evidence before the door is ordered. Do not treat a material description such as “steel” as proof of energy, structural, water, air, impact, fire, accessibility, or security performance.
Put every requested label, report, test reference, calculation, shop drawing, and approval responsibility in the matrix. If it is not applicable, mark it not applicable with the responsible reviewer's agreement.
7. Separate product supply from installation work
The Steel Door Institute installation resource page organizes information for steel doors and frames, but the applicable method still depends on the selected unit and wall condition. A product quote may exclude demolition, disposal, rough-opening repair, sill-pan or flashing work, fastening design, sealants, insulation, trim, painting, hardware installation, electrical work, testing, and protection.
List each activity and its owner. Add inspection hold points before the frame is concealed and before trim or sealants cover interfaces that need verification.
8. Create a pre-order confirmation packet
- Project address and applicable review path
- Exterior and interior photos, including sill, jambs, head, wall, landing, and drainage
- Opening measurements at multiple points and diagonal checks
- Wall thickness, construction, finish build-ups, and desired jamb relationship
- Handing and swing sketch
- Threshold, floor, landing, and accessibility requirements
- Hardware, glazing, finish, performance, and documentation schedule
- Responsibility matrix for removal, repair, installation, flashing, sealing, testing, and acceptance
How to approach Senmit
The current Senmit Windows & Doors page is a general custom-project destination. Submit the confirmation packet and ask Senmit to state whether the requested prehung steel exterior door project is within its current offering. If it is, request a written description of the proposed product, performance evidence, supplied components, drawings, freight, lead assumptions, installation boundary, warranty, and exclusions.
Do not infer availability from this article. A quote should confirm the exact configuration and current commercial scope before any design or purchase decision.
All visuals in this article were generated for planning education. They are not Senmit product photographs, approved door details, installation instructions, dimensional proof, performance testing, labels, certification, warranty evidence, or proof of current product availability.
