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Safety Cue
Task-specific safety guidance for ordinary drainage-installation hazards.
Project 13
Install Foundation Drainage
Install the sitework portion of a foundation drainage system by preparing the footing perimeter, placing filter fabric and drainage aggregate, installing sloped perforated pipe to an approved outlet, testing continuity, and protecting the assembly, producing a continuous, protected, inspected foundation drainage path connected to an approved discharge system.
Field Cue System
These cues appear at the point of work. They identify safety, code, documentation, and continuity issues before a reversed slope, a damaged pipe run, or an unverified outlet connection is concealed by backfill.
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Critical Safety Cue
A condition that must stop work until corrected and reverified.
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Field Safety Cue
Practical work-area safety around the open footing perimeter, aggregate placement, and outlet excavation.
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Code Alert
Local requirements vary. Verify permitted pipe type, slope, aggregate, and required inspection before proceeding.
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Manufacturer Cue
Follow product-specific instructions for pipe fittings, filter fabric, and outlet protection accessories.
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Measurement Cue
Invert, slope, and elevation guidance for a continuous drainage path to the approved outlet.
Job Overview
This project qualifies you to install the sitework portion of a foundation drainage system and connect it to an approved discharge point. The finished work product is a continuous, protected, inspected foundation drainage path connected to an approved discharge system. This project begins only after the foundation surfaces and waterproofing are complete and undamaged; it does not include installing or repairing the waterproofing membrane itself, does not include sump pump selection or electrical connections, and does not include the backfill and compaction that follow in Project 12 where backfill occurs after this drainage work in the approved sequence.
You will review the approved drainage detail; confirm the foundation and waterproofing are complete and undamaged; inspect the footing perimeter and remove debris, standing water, and loose soil; establish pipe invert references and verify the outlet elevation; place filter fabric and the initial drainage aggregate bed; install perforated pipe in the required orientation and maintain continuous slope toward the outlet; join pipe sections and install cleanouts, transitions, and outlet protection; verify pipe elevation and slope at regular intervals; place additional drainage aggregate around and above the pipe; test continuity; and complete the required inspection before the assembly is concealed.
This is the thirteenth project in the site preparation sequence. It depends directly on the completed and inspected foundation waterproofing that precedes it, and on the footing excavation and layout controls established in Project 5. Where the approved scope includes foundation drainage, this project must be complete, inspected, and protected before the backfill work of Project 12 begins; the drainage installed here also supports the final site drainage established in Project 14.
Skills You Will Demonstrate
- SP-073 — Review the approved drainage detail, pipe type, elevation, slope, outlet, cleanouts, aggregate, and filter-fabric requirements, and confirm foundation surfaces and waterproofing are complete and undamaged.
- SP-074 — Inspect the footing perimeter and remove debris, standing water, and loose soil, and establish pipe invert references and verify outlet elevation.
- SP-075 — Place filter fabric where required without damaging waterproofing, place the initial drainage aggregate bed to the specified thickness and grade, and install perforated drainage pipe in the required orientation while maintaining continuous slope toward the approved outlet or sump.
- SP-076 — Join pipe sections using compatible fittings, preserve flow continuity, and install corners, cleanouts, transitions, and outlet protection while keeping soil and debris out of the open pipe.
- SP-077 — Verify pipe elevation and slope at regular intervals, place drainage aggregate around and above the pipe without displacing it, wrap or separate aggregate with filter fabric where specified, and protect waterproofing and insulation during aggregate placement.
- SP-078 — Test continuity using the approved method, correct low spots, reverse slope, crushed pipe, open joints, blocked outlets, or damaged fabric, photograph and document the system before concealment, complete the required inspection, and protect the assembly during backfill.
Where This Skill Fits
The footing excavation and layout controls from Project 5 define the perimeter this drainage system must follow, and the completed waterproofing this project builds against was installed and inspected before this work begins. This project does not repair or install waterproofing; a damaged or incomplete membrane found during Step 1 or Step 2 is a stop-work condition until the responsible trade corrects it.
The inspected, protected drainage path installed here must remain undisturbed and functional through the backfill of Project 12; do not allow backfill to proceed over an undocumented or unprotected drainage run. The outlet, cleanouts, and slope established here also control the final site drainage of Project 14, which must tie into an outlet condition that already functions correctly.
Scope and Intended Use
This project covers:
- reviewing the approved drainage detail, pipe type, elevation, slope, outlet, cleanouts, aggregate, and filter-fabric requirements
- confirming foundation surfaces and waterproofing are complete and undamaged before drainage work begins
- inspecting the footing perimeter and removing debris, standing water, and loose soil
- establishing pipe invert references and verifying outlet elevation
- placing filter fabric where required without damaging waterproofing
- placing the initial drainage aggregate bed to the specified thickness and grade
- installing perforated drainage pipe in the required orientation and maintaining continuous slope toward the approved outlet or sump
- joining pipe sections with compatible fittings and preserving flow continuity
- installing corners, cleanouts, transitions, and outlet protection
- keeping soil and debris out of the open pipe
- verifying pipe elevation and slope at regular intervals
- placing drainage aggregate around and above the pipe without displacing it
- wrapping or separating aggregate with filter fabric where specified
- protecting waterproofing and insulation during aggregate placement
- testing continuity, correcting deficiencies, documenting the system before concealment, and completing the required inspection
This project does not authorize the learner to:
- begin drainage work before the foundation surfaces and waterproofing are confirmed complete and undamaged
- install or repair the waterproofing membrane itself
- select a different pipe type, slope, aggregate, or fabric than the one specified in the approved drainage detail
- install pipe with a reverse slope, a low spot, or a discontinuous run and conceal it with aggregate
- connect the drainage outlet to an unapproved discharge point or leave the outlet condition unverified
- allow soil, debris, or aggregate fines into the open pipe before joints and cleanouts are complete
- conceal the completed assembly with additional aggregate or backfill without completing the required continuity test and inspection
- select, size, wire, or commission a sump pump or its electrical connection
Any condition requiring a revised pipe type, slope, outlet connection, or an engineer's determination must be escalated before work proceeds in that area.
Reference Conventions
Use these references, established in Projects 01 through 12, throughout this project. Do not redefine them.
| Term | Definition |
|---|---|
| Foundation drainage system | The pipe, fittings, filter fabric, and aggregate assembly installed along the footing perimeter to collect and convey water to an approved discharge point |
| Pipe invert | The interior bottom elevation of the drainage pipe at a given point along its run, used to control and verify slope |
| Continuous slope | An uninterrupted downward grade from the pipe's starting point to the approved outlet or sump, without reverse sections or low spots |
| Outlet | The approved discharge point, connection, or sump into which the drainage pipe delivers collected water |
| Flow continuity | An unobstructed, correctly jointed pipe path from the starting point of the run to the approved outlet, free of blockage, crushed sections, or open joints |
| Concealment | The point at which aggregate, fabric, or backfill placed over the drainage assembly prevents further visual inspection of the pipe, joints, and connections |
Foundation Drainage Record
Before drainage installation begins, record the following:
Foundation surfaces and waterproofing confirmed complete and undamaged: ______ Approved drainage detail and pipe type reviewed: ______ Outlet elevation verified: ______
Pipe type and fittings confirmed suitable: ____________ Date started: ____________ Builder name: ____________
Prerequisites
- Completed foundation with waterproofing installed and inspected as required by the approved plan, confirmed complete and undamaged before this project begins
- Completed Project 5 footing excavation, verified at its recorded dimensions and benchmark elevation along the drainage route
- Approved drainage detail identifying pipe type, elevation, slope, outlet, cleanouts, aggregate, and filter-fabric requirements reviewed before installation begins
- Confirmed, accessible approved outlet, discharge connection, or sump location
- Pipe, fittings, cleanouts, filter fabric, and aggregate sourced and confirmed suitable against the project specification
Common Field Fundamentals
Foundation drainage only performs its function if the pipe maintains a continuous downward slope to an approved outlet along its entire length, joints remain sealed and aligned, and the surrounding aggregate and fabric keep the system from clogging with fines. A single reverse section, an open joint, or a blocked outlet can defeat an otherwise correctly installed system, and once the run is covered with aggregate and backfill, correcting these defects becomes far more disruptive.
Readiness checkFoundation and waterproofing confirmed complete
Perimeter inspectionDebris, water, loose soil removed
Invert and outletReferences established, elevation verified
Bed and fabricAggregate bed placed, fabric protected
Pipe installationOrientation, slope, joints, cleanouts
Cover placementAggregate around and above pipe
Continuity testVerified flow to approved outlet
DocumentationPhotographed, inspected before concealment
Working Along the Footing Perimeter
Every section of pipe placed depends on the invert reference established before it and on the protective fabric or covering remaining undamaged over the waterproofing beneath and beside it. Recheck slope continuity at every joint and cleanout throughout Steps 7 through 12 of this project. If a field condition suggests the outlet elevation is incorrect, the waterproofing is damaged, or the pipe run cannot maintain continuous slope as installed, stop and obtain direction before continuing; do not force a pipe run to an incorrect grade to avoid a delay.
SP-073 – SP-078
Foundation Drainage Installation Qualification
Foundation Drainage Installation
A. Finished-Deliverable Specification
Deliverable: one continuous foundation drainage system matching the approved pipe type, invert elevation, slope, outlet connection, cleanout spacing, aggregate specification, and filter-fabric requirement; installed along the full footing perimeter within scope; jointed to preserve flow continuity with corners, cleanouts, and transitions installed as specified; bedded and covered in drainage aggregate without displacing pipe position; protected against waterproofing damage throughout placement; and documented through a completed continuity test and inspection record before concealment.
B. Foundation Drainage Deliverable Schedule
| Item | Quantity | Form | Content Requirement | Purpose |
|---|---|---|---|---|
| Confirmed foundation readiness | Full perimeter within scope | Written confirmation | Foundation surfaces and waterproofing complete and undamaged | Establishing that drainage work will not conceal or damage incomplete waterproofing |
| Prepared footing perimeter | Full length of drainage route | Cleared and inspected condition | Free of debris, standing water, and loose soil | Providing a sound base for the aggregate bed and pipe |
| Aggregate bed and filter fabric | Full length of drainage route | Placed and graded material | Specified thickness, grade, and fabric orientation | Supporting the pipe at the correct invert and separating aggregate from surrounding soil |
| Installed pipe run | Full length of drainage route | Jointed, sloped pipe with cleanouts and outlet connection | Continuous slope to the approved outlet, compatible fittings, no open joints | Conveying collected water to the approved discharge point |
| Aggregate cover | Full length of drainage route | Placed material around and above pipe | Specified thickness without displacing pipe position | Promoting drainage into the pipe while protecting it from load and damage |
| Continuity test and inspection record | 1 record for the system | Written record with photographs | Test method, results, corrections, and inspection sign-off documented | Confirming readiness for backfill and subsequent site work |
C. Material Takeoff
- Perforated drainage pipe, fittings, and cleanouts: sufficient length and quantity to complete the full drainage route specified by the approved detail, including corners, transitions, and outlet connection.
- Filter fabric: sufficient quantity to cover the specified aggregate surfaces along the full drainage route, meeting the manufacturer's overlap requirement.
- Drainage aggregate: sufficient volume to form the specified bed thickness and cover thickness along the full drainage route.
- Grade stakes and marking flags: sufficient quantity to mark invert references and pipe-run limits.
- Waste allowance: the material quantities above are working allowances; record any material used beyond the planned quantity, and the reason, on the drainage record.
D. Acceptance Standards
| Check | Standard |
|---|---|
| Pipe type and orientation | Approved pipe installed in the required orientation with compatible fittings throughout |
| Slope continuity | Continuous downward slope from the start of the run to the approved outlet, with no reverse sections or low spots |
| Joints and connections | All joints sealed and aligned, flow continuity preserved, no open or separated connections |
| Aggregate and fabric | Bed and cover placed to specified thickness and grade, fabric placed without damaging waterproofing |
| Outlet condition | Outlet connected to the approved discharge point and free of blockage |
| Continuity test | Approved test method completed with results documented and no deficiencies remaining |
| Documentation | Photographs and inspection record complete before concealment |
E. Preparation — Readiness Confirmation and Plan Review
- Review the approved drainage detail, pipe type, elevation, slope, outlet, cleanouts, aggregate, and filter-fabric requirements. Confirm these values against the approved plan or engineer's requirements before materials are staged.
- Confirm foundation surfaces and waterproofing are complete and undamaged. Verify with the responsible trade before drainage work begins.
F. Perimeter Preparation and Reference Establishment
- Inspect the footing perimeter and remove debris, standing water, and loose soil. Walk the full drainage route and clear every section before further work proceeds.
- Establish pipe invert references and verify outlet elevation. Set references at the required interval and confirm the outlet elevation before installing pipe.
G. Bedding, Fabric, and Pipe Installation
- Place filter fabric where required without damaging waterproofing. Install fabric against or beneath the specified surfaces before aggregate placement.
- Place the initial drainage aggregate bed to the specified thickness and grade. Shape the bed to support the pipe at the established invert.
- Install perforated drainage pipe in the required orientation. Position perforations as specified by the approved detail.
- Maintain continuous slope toward the approved outlet or sump. Verify slope against invert references as each section is placed.
H. Joints, Fittings, and Connections
- Join pipe sections using compatible fittings and preserve flow continuity. Confirm each joint is fully seated before proceeding to the next section.
- Install corners, cleanouts, transitions, and outlet protection. Place these components at the locations specified by the approved detail.
- Keep soil and debris out of the open pipe. Cap or cover open ends whenever work is not actively in progress.
I. Verification, Cover, and Protection
- Verify pipe elevation and slope at regular intervals. Check every joint, cleanout, corner, and transition against the established invert references.
- Place drainage aggregate around and above the pipe without displacing it. Place material carefully to maintain verified pipe position.
- Wrap or separate aggregate with filter fabric where specified. Follow the approved detail for fabric placement around the completed pipe run.
- Protect waterproofing and insulation during aggregate placement. Maintain protective covering throughout this step.
J. Testing, Documentation, and Inspection
- Test continuity using the approved method. Perform or arrange the specified test and record the results.
- Correct low spots, reverse slope, crushed pipe, open joints, blocked outlets, or damaged fabric. Resolve every deficiency identified during testing before proceeding.
- Photograph and document the system before concealment. Capture the pipe run, joints, cleanouts, and outlet connection.
- Complete required inspection. Obtain the required sign-off before the assembly is concealed.
- Protect the drainage assembly during backfill. Maintain protective measures until the backfill of Project 12 begins.
Common Site Inspection
Inspect the completed foundation drainage system using the same checks regardless of perimeter length or pipe run distance.
- Pipe type and orientation check: confirm approved pipe installed in the required orientation with compatible fittings.
- Slope continuity check: confirm continuous downward slope to the approved outlet, with no reverse sections or low spots.
- Joint and connection check: confirm all joints are sealed, aligned, and preserve flow continuity.
- Aggregate and fabric check: confirm bed and cover meet specified thickness and grade, and fabric is placed without waterproofing damage.
- Outlet check: confirm the outlet connects to the approved discharge point and is free of blockage.
- Documentation check: confirm the continuity test and inspection record is complete and current, with photographs taken before concealment.
Complete the Foundation Drainage Record Sheet in the Inspection Checklist section below before the perimeter is concealed by backfill.
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Failure Points and Troubleshooting
Cleanup
This project ends with a protected, inspected foundation drainage system ready for backfill, not a backfilled or restored perimeter.
- Confirm the completed drainage system is protected from traffic, erosion, and disturbance
- Confirm grade stakes and invert references remain visible and undisturbed where still needed for backfill
- Confirm the outlet connection remains accessible and free of blockage
- Remove surplus pipe cuttings, fabric scraps, and debris from the work area and equipment routes
- File the completed foundation drainage record, continuity test results, and photographs with the Project 01 through 12 records
Field Terms
- Foundation Drainage System
- The pipe, fittings, filter fabric, and aggregate assembly installed along the footing perimeter to collect and convey water to an approved discharge point.
- Pipe Invert
- The interior bottom elevation of the drainage pipe at a given point along its run, used to control and verify slope.
- Continuous Slope
- An uninterrupted downward grade from the pipe's starting point to the approved outlet or sump, without reverse sections or low spots.
- Outlet
- The approved discharge point, connection, or sump into which the drainage pipe delivers collected water.
- Flow Continuity
- An unobstructed, correctly jointed pipe path from the starting point of the run to the approved outlet, free of blockage, crushed sections, or open joints.
- Concealment
- The point at which aggregate, fabric, or backfill placed over the drainage assembly prevents further visual inspection of the pipe, joints, and connections.
- Stop-Work Condition
- A field condition requiring work to halt until a competent person, engineer, or responsible party provides direction.
Skill Check
- Why must foundation surfaces and waterproofing be confirmed complete and undamaged before drainage installation begins?
- Why must pipe invert references be established and verified before the first section of pipe is installed?
- What must occur before filter fabric or aggregate contacts the waterproofing membrane?
- Why must slope be verified at every joint, cleanout, corner, and transition rather than only at the start and end of the run?
- What must a builder do upon discovering a reverse slope, crushed pipe, or open joint during installation?
- Why must the open pipe be capped or covered whenever work is not actively in progress?
- Why must a continuity test be completed before the system is concealed with aggregate or backfill?
- Why must the drainage assembly be photographed and documented before concealment?
- What must occur if the outlet connection does not match the approved discharge point or elevation?
- What must be completed before the drainage system is released for the backfill work of Project 12?
Competency Rubric
| Competency | Independent Pass Standard | Not Demonstrated | With Assistance | Independently |
|---|---|---|---|---|
| SP-073 | Reviews the approved drainage detail, pipe type, elevation, slope, outlet, cleanouts, aggregate, and filter-fabric requirements, and confirms foundation surfaces and waterproofing are complete and undamaged | |||
| SP-074 | Inspects the footing perimeter and removes debris, standing water, and loose soil, and establishes pipe invert references and verifies outlet elevation | |||
| SP-075 | Places filter fabric without damaging waterproofing, places the initial drainage aggregate bed to specified thickness and grade, and installs perforated drainage pipe in the required orientation while maintaining continuous slope toward the approved outlet or sump | |||
| SP-076 | Joins pipe sections using compatible fittings, preserves flow continuity, installs corners, cleanouts, transitions, and outlet protection, and keeps soil and debris out of the open pipe | |||
| SP-077 | Verifies pipe elevation and slope at regular intervals, places drainage aggregate around and above the pipe without displacing it, wraps or separates aggregate with filter fabric where specified, and protects waterproofing and insulation during placement | |||
| SP-078 | Tests continuity using the approved method, corrects deficiencies, photographs and documents the system before concealment, completes required inspection, and protects the assembly during backfill |
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 Drainage Record Sheet
| Item | Approved / Specified Value | Field Result | Within Requirement (Y/N) | Correction (if any) |
|---|---|---|---|---|
| Pipe type and orientation | ||||
| Slope continuity | ||||
| Joints and connections | ||||
| Aggregate bed and cover thickness | ||||
| Filter fabric placement | ||||
| Outlet connection and elevation | ||||
| Continuity test result |
Escalations and direction obtained (list): ____________ Unresolved conditions: ____________
Foundation drainage declared ready for backfill: ______ (Yes/No) Date: ____________ Builder name: ____________
Performance Check
With bedding, pipe installation, jointing, cover placement, and testing complete, review the completed system against the Acceptance Standards table and confirm the approved pipe type is installed in the required orientation with compatible fittings throughout, slope is continuous from the start of the run to the approved outlet with no reverse sections or low spots, all joints are sealed and aligned with flow continuity preserved, aggregate bed and cover meet the specified thickness and grade with fabric placed as required, the outlet connects to the approved discharge point and is free of blockage, and the continuity test result is documented with no deficiencies remaining. Complete the Foundation Drainage Record Sheet and correct any failed item before the system is concealed by backfill.
Project Closeout
You have completed the thirteenth project in the site preparation sequence: installing the sitework portion of a foundation drainage system and connecting it to an approved discharge point. This project required you to review the approved drainage detail and confirm foundation surfaces and waterproofing are complete and undamaged (SP-073), inspect the footing perimeter and establish verified invert and outlet references (SP-074), place fabric and the aggregate bed and install pipe in the required orientation while maintaining continuous slope (SP-075), join pipe sections and install cleanouts, transitions, and outlet protection while preserving flow continuity (SP-076), verify elevation and slope at regular intervals and place protective aggregate cover (SP-077), and test continuity, correct deficiencies, document the system, and complete the required inspection (SP-078).
You now have a continuous, protected, and documented foundation drainage path connected to an approved discharge system.
Protect the finished drainage assembly from disturbance until backfill begins. The backfill of Project 12, where drainage precedes backfill in the approved sequence, and the final site drainage of Project 14 depend on this system remaining at its verified slope and connection until those operations proceed.