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Safety Cue
Task-specific safety guidance for ordinary work hazards.
Project 11
Install Foundation Drain Tile
Install a permanent perimeter foundation-drain system that collects water at the footing and conveys it to the approved gravity outlet, sump, or designed discharge point, and document a continuous, sloped, protected, and tested system before insulation and backfill proceed.
Field Cue System
These cues appear at the point of work. They identify safety, code, manufacturer, and measurement issues before they become a blocked drain, a damaged waterproofing system, or a failed inspection.
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Critical Safety Cue
Serious injury, structural risk, or major damage is possible.
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Field Safety Cue
Practical work-area safety: trench edges, wet soil conditions, and equipment near the footing perimeter.
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Code Alert
Local requirements vary. Verify permit, discharge-point, and jurisdictional rules.
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Manufacturer Cue
Follow product-specific instructions for pipe, fittings, fabric, and sump components.
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Measurement Cue
Invert elevation, slope, and continuity guidance.
Job Overview
This project qualifies you to install a permanent perimeter foundation-drain system at the footing, using the approved drain detail to control pipe material, perforation orientation, elevation, slope, cleanouts, aggregate, filter fabric, and discharge method. The finished work product is a continuous, sloped, tested drain line running the full protected perimeter, connected to the approved gravity outlet, sump, or designed discharge point, with the adjacent waterproofing reinspected and repaired as needed.
You will review the approved drain detail, confirm that waterproofing and wall repairs are complete and protected, establish invert elevations, prepare the drain bed, place and join perforated pipe at the correct slope, install cleanouts and transition fittings, surround the pipe with aggregate and filter fabric, test the completed line, and photograph and document the system before it is concealed by insulation, protection board, and backfill.
This project depends directly on the waterproofing or damp-proofing system completed in Project 10. It also sets the discharge conditions that must be protected through insulation installation in Project 12 and backfill in Project 13. No aggregate, backfill, or insulation work may bury the drain line until this project's continuity test and inspection are complete and recorded.
Skills You Will Demonstrate
- FN-061 — Establish drain slope from verified invert elevations toward the approved outlet or sump.
- FN-062 — Place filter fabric at the drain bed and around the aggregate as specified, without puncturing the wall system.
- FN-063 — Install perforated pipe in the required orientation and location relative to the footing.
- FN-064 — Surround the installed pipe with drainage aggregate to the specified thickness without displacing it.
- FN-065 — Route discharge through cleanouts, transitions, and solid outlet pipe to the approved discharge point.
- FN-066 — Inspect and test drainage continuity and document the completed system before concealment.
Where This Skill Fits
Project 10 established a continuous foundation moisture-control system on the wall surfaces. This project adds the second half of the water-management strategy: a permanent drain line at the footing that intercepts groundwater before it can build hydrostatic pressure against the wall. The invert-elevation and slope-verification method used here — establishing a fixed reference and checking continuity along the full run before covering the work — is the same discipline applied to the vapor-barrier and reinforcement work in Project 15 and to the final drainage grading confirmed during the Chapter 20 capstone.
The drain system installed in this project must remain functional and undamaged through insulation installation, backfill, and the life of the structure. Every aggregate placement, insulation panel, and backfill lift performed in later projects is required to protect, not bury blindly, the pipe, fabric, and outlet components verified here.
Scope and Intended Use
This project covers:
- reviewing the approved drain detail, pipe material, perforation orientation, elevation, slope, cleanouts, aggregate, filter fabric, and outlet or sump requirements
- confirming that waterproofing and required wall repairs are complete and protected from damage before drain work begins
- establishing invert elevations and confirming that the approved discharge point can receive flow
- preparing the drain bed, placing filter fabric, and installing perforated pipe at the required slope
- installing corners, tees, cleanouts, risers, sumps, solid outlet pipe, and transition fittings
- placing and wrapping drainage aggregate around the pipe
- testing drainage continuity and inspecting adjacent waterproofing for damage
- photographing and documenting the completed system before concealment
This project does not authorize the learner to:
- select a discharge method, sump-pump system, or connection to a public storm system without the approved drain detail and any required permit or jurisdictional approval
- alter the specified pipe diameter, perforation pattern, aggregate gradation, or slope on independent judgment
- bury, backfill, or insulate over the drain system before the continuity test and inspection required in this project are complete
- repair or modify the waterproofing membrane using a different product than the one approved in Project 10 without authorization
Any drain-slope reading, aggregate condition, fabric placement, fitting connection, or continuity test result that fails the approved standard must be corrected and reverified before the drain system is concealed.
Reference Conventions
Establish these references before any drain-tile installation begins, and do not change them mid-installation.
| Term | Definition |
|---|---|
| Invert elevation | The elevation of the interior bottom of the pipe at a given point, used to establish and verify slope |
| Approved discharge point | The gravity outlet, sump, or designed discharge location identified in the approved drain detail that receives the drain-system flow |
| Drain bed | The prepared base beneath the pipe, including any filter fabric and initial aggregate lift, established at the required elevation and grade |
| Perforated pipe | The pipe section that collects water along the footing perimeter through its perforations, installed in the orientation required by the approved detail |
| Solid outlet pipe | The unperforated pipe section that conveys collected water from the perimeter system to the approved discharge point without further collection |
| Cleanout | An accessible fitting installed to allow inspection, flushing, or camera access to the drain line after installation |
Reference and Installation Record
Before installing any pipe, record the selected references directly on the Foundation Drain Inspection Record:
Site name/address: ______ Benchmark reference: ______ Approved discharge point: ______ Specified pipe material and diameter: ______
Date started: ____________ Installer name: ____________
Prerequisites
- Completed Project 10 waterproofing or damp-proofing system, including all required wall repairs, fully cured and inspected
- Access to the approved drain detail specifying pipe material, perforation orientation, elevation, slope, cleanouts, aggregate, filter fabric, and discharge or sump requirements
- A confirmed, functioning discharge point, sump, or daylight outlet capable of receiving the design flow
- A calibrated laser level or transit and rod, and a pipe saw or cutting tool matched to the specified pipe material
- Written confirmation that the footing perimeter is clear of debris, standing water, and outlet conflicts before pipe placement begins
Common Field Fundamentals
Every drainage installation in this book, from this perimeter drain to the discharge and grading verification performed during the Chapter 20 capstone, follows the same sequence: confirm the fixed elevation references, prepare the bed, place and join the pipe at the required slope, protect the pipe with aggregate and fabric, and test continuity before concealment. Learning that sequence here, before insulation or backfill begins, means every later drainage or grading check starts from a method you already trust.
Invert checkInvert elevations verified from the benchmark at each end and at regular intervals
Slope checkContinuous fall toward the outlet or sump, no reverse-slope or flat sections
Fabric and aggregate checkFilter fabric and aggregate placed to the specified thickness without displacing the pipe
Continuity checkFlow, camera, or visual test confirms an open, unobstructed line to the discharge point
Invert Elevations and Continuous Slope
Every invert elevation in this installation is verified from the benchmark identified in Step 4 of Project 1 or its transferred control. Slope must be continuous toward the outlet or sump for the full length of the run; a flat or reverse-slope section anywhere in the line is a defect even if the average grade of the full run is correct. Do not rely on a single elevation check at each end of a long run without intermediate checks.
FN-061 – FN-066
Foundation Drainage Installation Qualification
Foundation Drain Tile Installation
A. Finished-Project Specification
Deliverable: one continuous perforated drain line installed at the required orientation and slope around the protected footing perimeter, joined with corners, tees, cleanouts, and transitions as specified, surrounded by filter fabric and drainage aggregate to the specified thickness, connected through solid outlet pipe to the approved discharge point or sump, tested for continuity, and recorded on a completed Foundation Drain Inspection Record.
B. Assessed Installation Schedule
| Item | Reference Used | Standard | Purpose |
|---|---|---|---|
| Invert elevations | Protected benchmark | Match the approved drain detail at every checked interval | Establish and confirm continuous slope |
| Pipe orientation and location | Footing perimeter and approved detail | Perforations and pipe position match the approved detail exactly | Confirm correct water collection at the footing |
| Filter fabric and aggregate | Approved drain detail | Placed to specified thickness and wrap without puncturing the wall system | Protect pipe function and prevent soil intrusion |
| Fittings, cleanouts, transitions | Approved drain detail | Match the specified type, location, and orientation | Maintain smooth flow and provide future access |
| Discharge connection | Approved discharge point | Confirmed capable of receiving design flow before and after connection | Confirm the system functions as designed |
| Continuity test | Approved test method | Passes without blockage, reverse slope, or leakage at joints | Verify the completed system before concealment |
C. Document and Material Takeoff
- Controlling documents: approved drain detail, pipe material specification, perforation orientation, elevation and slope requirements, cleanout schedule, aggregate specification, filter-fabric specification, and sump or outlet requirements, assembled before any installation begins.
- Materials: perforated drain pipe, solid outlet pipe, corner and tee fittings, cleanout risers, filter fabric, drainage aggregate, and sump or outlet components, all matching the approved drain detail.
- Waterproofing protection: materials and procedures needed to repair any waterproofing damage discovered or caused during drain installation, per the approved system from Project 10.
- Escalation contact: a named engineer or designer identified before installation begins, for use if the approved discharge point cannot receive flow or a drain-detail conflict is found.
D. Acceptance Standards
| Check | Standard |
|---|---|
| Invert elevation and slope | Continuous fall toward the outlet or sump at every checked interval; no flat or reverse-slope section |
| Pipe orientation | Perforations and pipe position match the approved detail; solid pipe used only where specified |
| Filter fabric | Continuous coverage at the drain bed and around the aggregate as specified, with no puncture of the wall system |
| Aggregate placement | Specified thickness above and around the pipe achieved without floating, crushing, or displacing the pipe |
| Fittings and cleanouts | Installed at every location required by the approved detail, joined with compatible fittings, and accessible for future inspection |
| Continuity test | Passes the approved flow, camera, or visual test with no blockage, reverse slope, open joint, or leakage identified |
| Adjacent waterproofing | Inspected after drain installation with any damage repaired using the approved system before concealment |
E. Preparation — Document Review and Site Inspection
- Review the approved drain detail, pipe material, perforation orientation, elevation, slope, cleanouts, aggregate, filter fabric, sump or outlet, and inspection requirements. Confirm the document set is complete before proceeding to Step 2.
- Confirm that waterproofing and required wall repairs are complete and protected from damage. Obtain the Project 10 inspection record before disturbing the wall surface.
- Inspect the footing perimeter for debris, standing water, irregular surfaces, damaged coating, and outlet conflicts. Record every condition found before continuing.
F. Establishing References and Preparing the Bed
- Establish invert elevations and verify that the approved discharge point can receive flow. Mark the selected invert reference at the outlet end before proceeding.
- Prepare the drain bed and place filter fabric where required without puncturing the wall system. Fold fabric up the wall face only to the height specified in the approved detail.
- Place the initial drainage aggregate to the specified thickness and grade. Check the bed elevation against the invert reference before placing pipe.
G. Pipe Installation
- Install perforated pipe in the required orientation and location relative to the footing. Confirm perforation orientation matches the approved detail before joining sections.
- Join pipe sections with compatible fittings and maintain smooth internal flow paths. Seat every joint fully before backfilling around it.
- Install corners, tees, cleanouts, risers, sumps, solid outlet pipe, and transition fittings. Locate each fitting exactly as shown in the approved detail.
- Maintain continuous slope toward the outlet or sump. Check invert elevation at every fitting and at the specified interval.
- Protect open pipe ends from soil, concrete, aggregate, insects, and construction debris. Cap or cover every open end at the close of each work session.
H. Verification, Aggregate Placement, and Fabric Wrap
- Verify pipe elevation, slope, alignment, and outlet continuity at regular intervals. Record each interval reading on the Foundation Drain Inspection Record.
- Place drainage aggregate around and above the pipe without floating, crushing, or displacing it. Place aggregate in controlled lifts working away from the pipe.
- Wrap or separate the drainage aggregate with filter fabric where specified. Overlap fabric seams by the amount required in the approved detail.
- Install outlet protection, backwater controls, sump components, or daylight termination features required by the design. Confirm each component matches the approved detail before final connection.
I. Testing and Correction
- Conduct the approved continuity, flow, camera, or visual test. Perform the test before further aggregate or fabric conceals any section of the line.
- Correct reverse slope, low spots, open joints, blocked pipe, damaged fabric, crushed sections, and outlet problems. Reopen and repair any section that fails the test before retesting.
J. Waterproofing Reinspection, Recording, and Release
- Inspect the adjacent waterproofing after installation and repair any damage using the approved system. Do not conceal drain work until this reinspection is complete.
- Photograph pipe position, slope controls, cleanouts, outlets, aggregate, and fabric before concealment. Photograph every fitting location before it is surrounded by additional aggregate.
- Complete the drainage-system inspection and protect it during insulation and backfill. Sign and date the release section of the Foundation Drain Inspection Record.
Common Drainage Inspection
Inspect every drain-system item using the same checks regardless of which section, fitting, or discharge component it applies to.
- Invert and slope check: confirm continuous fall toward the outlet or sump at every checked interval, verified from the protected benchmark.
- Orientation check: confirm perforated pipe faces and is located exactly as required by the approved drain detail.
- Fabric and aggregate check: confirm continuous fabric coverage and specified aggregate thickness without pipe displacement.
- Fitting check: confirm every corner, tee, cleanout, riser, and transition is installed, seated, and accessible.
- Continuity check: confirm the approved flow, camera, or visual test passes with no blockage or leakage.
- Waterproofing check: confirm the adjacent wall system shows no new damage from drain installation.
Complete the Foundation Drain Inspection Record in the Inspection Checklist section below before releasing the work for Project 12.
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Failure Points and Troubleshooting
Cleanup
This project ends with a tested, protected drain system and a clean perimeter, not an open trench.
- Confirm every cleanout and riser is capped, accessible, and protected from equipment traffic
- Remove excess pipe cutoffs, packaging, and unused fittings from the trench area
- Store unused aggregate, fabric, and fittings for the next installation cycle
- Confirm the discharge point or sump connection is protected from debris until final grading
- Return the Foundation Drain Inspection Record and photographs to the project record with the Project 10 waterproofing documentation
Field Terms
- Invert Elevation
- The elevation of the interior bottom of the pipe at a given point, used to establish and verify slope.
- Approved Discharge Point
- The gravity outlet, sump, or designed discharge location identified in the approved drain detail.
- Drain Bed
- The prepared base beneath the pipe, including filter fabric and initial aggregate, at the required elevation and grade.
- Perforated Pipe
- Pipe with openings that collect water along the footing perimeter, installed in the required orientation.
- Solid Outlet Pipe
- Unperforated pipe that conveys collected water to the approved discharge point.
- Cleanout
- An accessible fitting installed to allow inspection, flushing, or camera access to the drain line.
- Filter Fabric
- Permeable fabric that separates drainage aggregate from surrounding soil while allowing water to pass.
- Continuity Test
- The flow, camera, or visual test used to confirm an open, unobstructed drain line before concealment.
- Foundation Drain Inspection Record
- The document recording invert elevations, slope readings, materials, test results, and release.
- Release
- The formal, signed authorization that the drain system is complete and insulation or backfill may proceed.
Skill Check
- Why must invert elevation be checked at regular intervals along the run rather than only at the two ends?
- What must occur before connecting the outlet pipe to the approved discharge point or sump?
- Why must filter fabric be folded up the wall face only to the height specified in the approved detail, rather than as high as convenient?
- What is the required response when the continuity test identifies a blockage or open joint?
- Why must open pipe ends be capped or covered at the close of each work session?
- What must the learner do if aggregate placement is found to have displaced or floated the pipe out of position?
- Why must the adjacent waterproofing be reinspected after drain installation rather than assumed undamaged?
- What are three possible causes of a reverse-slope section in a drain run, and how does the learner confirm which one occurred?
- Why must every fitting be photographed before it is surrounded by additional aggregate?
- Why must insulation and backfill not begin until the continuity test has passed and the inspection record is complete?
Competency Rubric
| Competency | Independent Pass Standard | Not Demonstrated | With Assistance | Independently |
|---|---|---|---|---|
| FN-061 | Establishes drain slope from verified invert elevations toward the approved outlet or sump, with continuous fall confirmed at every checked interval | |||
| FN-062 | Places filter fabric at the drain bed and around the aggregate as specified, without puncturing the wall system | |||
| FN-063 | Installs perforated pipe in the required orientation and location relative to the footing, joined with compatible fittings | |||
| FN-064 | Surrounds the installed pipe with drainage aggregate to the specified thickness without floating, crushing, or displacing it | |||
| FN-065 | Routes discharge through cleanouts, transitions, and solid outlet pipe to the approved discharge point or sump | |||
| FN-066 | Conducts the approved continuity test, reinspects adjacent waterproofing, and completes the Foundation Drain Inspection Record before concealment |
Mark one column per competency. Only Demonstrated Independently awards the competency; Demonstrated with Assistance authorizes additional supervised practice but does not complete the requirement.
Inspection Checklist — Foundation Drain Inspection Record
| Item | Plan Value | Measured/Observed Value | Difference | Pass (Y/N) | Correction (if any) |
|---|---|---|---|---|---|
| Invert elevation — Outlet end | |||||
| Invert elevation — Far end | |||||
| Invert elevation — Interval checks | |||||
| Pipe orientation and location | |||||
| Filter fabric coverage | |||||
| Aggregate thickness | |||||
| Cleanouts and fittings | |||||
| Outlet/sump connection | |||||
| Continuity test result | |||||
| Adjacent waterproofing condition |
Conflicts identified: ____________
Drain installation declared complete: ______ (Pass/Fail) Date: ____________ Installer name: ____________ Released by: ____________
Performance Check
With the drain line placed, sloped, protected, and tested, review the finished Foundation Drain Inspection Record against the Acceptance Standards table and confirm every invert elevation and slope reading shows continuous fall toward the outlet or sump, pipe orientation and location match the approved detail, filter fabric and aggregate are placed to the specified thickness and coverage, every fitting and cleanout is installed and accessible, the continuity test has passed without blockage or leakage, and the adjacent waterproofing shows no unrepaired damage. Complete the record and resolve any unresolved conflict before releasing the work for Project 12. If an item fails, identify whether the error occurred in bed preparation, pipe placement, aggregate placement, fitting installation, or discharge-point condition before recording the correction and re-running the affected check.
Project Closeout
You have completed the eleventh project in the concrete and residential foundations sequence: installing foundation drain tile. This project required you to establish drain slope from verified invert elevations (FN-061), place filter fabric at the drain bed and aggregate (FN-062), install perforated pipe in the required orientation and location (FN-063), surround the pipe with drainage aggregate to the specified thickness (FN-064), route discharge through cleanouts and transitions to the approved discharge point (FN-065), and inspect and test drainage continuity before documenting the completed system (FN-066).
You now have a continuous, sloped, protected, tested, and documented foundation-drain system connected to the approved discharge method. That protected system carries directly into the next project: installing foundation insulation and protection board over the same waterproofed, drained wall assembly.
Protect the drain line, fabric, aggregate, cleanouts, and discharge connection verified here. Every insulation panel, protection-board section, and backfill lift placed in the projects that follow must preserve, not bury blindly, the system you have just tested.