Title: Roof truss repair: who to call first | Cercha
Description: Know who to call about a damaged or cut roof truss, what evidence to send, and how to coordinate a written repair detail before work resumes.
Canonical: https://cercha.pages.dev/guides/damaged-roof-truss/
# Damaged or cut truss: who to call before you fix it
Trusses and structure
A damaged truss needs a project-specific response from the responsible design professionals before anyone attempts a field repair.
You find a split chord, displaced connector plate, or truss member cut for a duct. Stop work that could load, alter, or conceal the affected area. Contact the truss manufacturer and building designer for direction. A roof truss repair needs an assessment of the damaged truss.
SBCA's [truss repair design guidance](https://kcenter.sbcacomponents.com/resource/sbca-knowledge-center-design-of-truss-repairs-dg-no-2501) directs contractors to seek professional assistance when trusses are damaged or altered. It explains that each situation needs individual analysis. Do not copy a repair from another job.
## Make the first call about safety and identification
Notify the superintendent and installation lead immediately. Keep people out of an area that may be unstable. Ask the responsible professionals what to do before anyone approaches, loads, or tries to support the truss.
Do not improvise shoring while waiting for an answer. Describe the current condition and request direction for any temporary measures. Tell the manufacturer whether the truss is still bundled, on the ground, partly erected, or incorporated into the roof.
Identify the job, manufacturer, and truss mark. Ask for the person handling field technical questions. If the original manufacturer is unknown, give the building designer the documents and labels you can obtain safely. Ask how to identify the truss and have it assessed.
Use the [roof truss design guide](/guides/how-roof-trusses-are-designed/) to distinguish the people involved. SBCA's [design-responsibility guidance](https://www.sbcacomponents.com/media/helping-structural-engineers-incorporate-components-into-projects) separates the individual truss design from the whole-building structural system. Both may matter to the response.
## Get design direction before attempting a repair
A crew may suggest plywood, extra lumber, screws, a strap, or another plate. Record the suggestion if useful. Do not attempt the repair without the responsible designer's direction. Ask what the repair must achieve and how the design will establish it.
Changing a member or connection changes the condition the original drawing describes. SBCA warns about [cutting, drilling, and modifying components without consultation](https://www.sbcacomponents.com/media/the-best-of-the-best-practices). Do not judge whether the truss is acceptable by the size of the visible damage.
Keep removed pieces and relevant delivery information when safe to do so. Do not drive a displaced plate back into place to improve the photograph. Preserve the condition so the evaluator can understand what happened.
If a service route conflicts with an intact truss, ask the design team before the trade proceeds. Ask whether rerouting the service is possible. Resolve any proposed alteration before cutting the truss.
## Send the designer drawings, photos, and site details
Prepare one message with a clear subject: project, truss mark, and observed condition. Attach the current truss drawing and placement information. Avoid sending an isolated close-up with no location reference.
SBCA says repair evaluation may use [marked-up drawings, photographs, or a site visit](https://kcenter.sbcacomponents.com/resource/sbca-knowledge-center-design-of-truss-repairs-dg-no-2501). Ask the recipient which measurements are needed and how they can be obtained safely. Distinguish measured facts from estimates in your message.
Recommended submission contents:
| Evidence | What to include |
| --- | --- |
| Identification | Job address, manufacturer, truss mark, and drawing revision |
| Location | Roof area, placement reference, and orientation |
| Overall view | Entire affected component where safely visible |
| Detail views | Damage from available sides, with surrounding connections visible |
| Description | What happened, when it was found, and who observed it |
| Current condition | Installation stage, nearby work, and any temporary measures already taken |
| Constraints | Access, finishes, services, and obstructions relevant to performing a repair |
| Contact | Superintendent and crew lead available for questions |
Ask the design team whether it has enough information. Keep the reply with the original report. If the photos do not show enough, ask what inspection is needed next.
## Keep the truss drawing beside the damage report
Use the correct component drawing, not the sheet for a similar-looking neighboring truss. SBCA's [drawing-reading resources](https://www.sbcacomponents.com/how-to-read-truss-design-drawings) distinguish dimensions, loads, bearings, and bracing topics. Ask the manufacturer to resolve any uncertainty about the truss mark.
Mark the observed damage location on a copy. Leave the original drawing unchanged. Label each photo so the recipient can connect it to the marked location.
If multiple components are affected, list them separately. Do not assume one repair applies across the shipment. Ask whether the evaluator needs information about adjacent trusses or the supporting structure.
A damaged delivery also needs a receiving record. Use the [delivery and storage checklist](/guides/truss-delivery-and-storage/) to preserve the shipment reference and site conditions. Handle delivery claims separately from the engineering decision about the truss.
## Obtain a written, project-specific response
Ask the responsible professional for a written decision: further evaluation, repair, replacement, or another conclusion. Request the drawing or written direction that applies to the identified truss. Confirm any sealing or permit-review requirements with the design professional and building official.
Before scheduling repair work, ask the installer to review the issued detail. Check that the installer understands the required materials, fasteners, access, and work sequence. If a part of the detail cannot be built as shown, return that question to its author.
Do not change a fastener or material because something similar is already on the truck. Request written clarification for a proposed substitution. Confirm how the completed work will be checked before it is concealed.
SBCA's [Component Warning Notice](https://www.sbcacomponents.com/cwn) keeps safety information attached to components and available on site. Retain those warnings alongside the specific repair response. A warning tag and a repair drawing serve different purposes.
## Adjust the schedule around the unresolved condition
Record which work is paused and why. Name the person responsible for the design response. Ask for the expected next update without promising the owner a repair completion date you do not control.
Identify dependent activities: lifting, sheathing, loading, rough-in, insulation, and cover. Have the responsible team decide which can proceed safely elsewhere. Work proceeding elsewhere does not clear the affected roof.
If replacement is required, reconfirm the delivery and installation arrangement. If repair is authorized, schedule the work and any required check together. Leave access available until the responsible reviewers have received the completion evidence.
Installation-stage stability still needs attention during the delay. SBCA's [BCSI guide](https://www.sbcacomponents.com/bcsi) addresses restraint and bracing. Ask the responsible contractor and designer how the interruption affects the installation plan.
## Close the issue before concealment
Keep the issued repair detail, revisions, photographs, installer confirmation, and required inspection records together. Ask the responsible reviewer to identify any remaining action. Mark the item closed only when that action is complete.
Tell later trades about current restrictions and changes. Remind them that another opening requires another coordination question. The same discipline applies to [truss spacing changes](/guides/roof-truss-spacing/) and service routes through [floor framing](/guides/floor-trusses-vs-i-joists/).
At the next preconstruction meeting, use the incident to improve the handoff. Assign a contact for structural conflicts before rough-in begins. Ask each trade to report a blocked route before cutting.
## Where Cercha fits
Cercha's trade search and Messages help you establish contact with framing crews and suppliers. Portfolios and endorsements provide background when choosing a contractor. Obtain the repair assessment and written direction directly from the responsible professionals.
Published 2026.10.14. Updated 2026.10.14.
[More guides: Trusses and structure]()
## Related guides
- [How roof trusses are designed: who owns what]()
- [Truss delivery, storage, and handling on site]()
- [Roof truss spacing: where the number comes from]()
- [Floor trusses vs I-joists]()
## Build your connections
[Ask about the beta]()
## Sources
1. Structural Building Components Association. (n.d.). *Design of Truss Repairs DG No. 2501*. Retrieved October 14, 2026, from https://kcenter.sbcacomponents.com/resource/sbca-knowledge-center-design-of-truss-repairs-dg-no-2501
2. Structural Building Components Association. (2026, May 12). *Helping Structural Engineers Incorporate Components into Projects*. https://www.sbcacomponents.com/media/helping-structural-engineers-incorporate-components-into-projects
3. Structural Building Components Association. (2026, September 3). *The Best of the Best Practices*. https://www.sbcacomponents.com/media/the-best-of-the-best-practices
4. Structural Building Components Association. (n.d.). *How to Read Truss Design Drawings*. Retrieved October 14, 2026, from https://www.sbcacomponents.com/how-to-read-truss-design-drawings
5. Structural Building Components Association. (n.d.). *Component Warning Notice (CWN)*. Retrieved October 14, 2026, from https://www.sbcacomponents.com/cwn
6. Structural Building Components Association. (n.d.). *Building Component Safety Information (BCSI) Guide*. Retrieved October 14, 2026, from https://www.sbcacomponents.com/bcsi