Install Gutters and Downspouts

A. Finished-Work Specification

Deliverable: one complete gutter run on the approved eave with hangers at the specified spacing, sealed end caps, one outlet and connected downspout run to an approved discharge location, joints installed by the manufacturer-specified method while maintaining the established slope, and a documented controlled water-flow test with corrections completed and rechecked.

B. Governing Documents

Document	Confirmed Current	Notes
Roof-drainage calculations
Gutter-system specification (profile, material, size)
Hanger type and spacing schedule
Outlet size and downspout route plan
Approved discharge location
Snow/ice requirements, where applicable
Manufacturer instructions

C. Acceptance Standards

Check	Standard
Fascia, roof edge, drip edge, roof covering readiness	Confirmed complete and safe before work begins
Gutter slope	Established from measured high- and low-point references and matches the drainage calculation; deviations recorded and corrected
Hanger spacing and fastening	Matches the approved product and load schedule; no stripped or deformed fasteners
Joints, corners, outlets, end caps	Installed using the manufacturer's specified method; sealed only at specified locations; no leakage during test
Downspout run	Plumb or aligned to the approved route, required wall clearance maintained, connected to an approved discharge without sealing required cleanouts
Controlled water-flow test	Conducted from the gutter high point; slope, standing water, joint leakage, outlet flow, overflow, downspout movement, and discharge performance observed and recorded
Documentation	Dimensions, slope, hanger spacing, outlet locations, discharge route, and test results recorded and signed

D. Required Project Sequence

1. Review roof-drainage calculations, gutter profile, material, size, hanger type, hanger spacing, outlet size, downspout route, discharge location, snow or ice requirements, and manufacturer instructions. Confirm the revision or date on each document before using it as a reference, and record the confirmation on the governing-documents table above.
2. Confirm that fascia, roof edge, drip edge, roof covering, access, and below-eave work zones are complete and safe. Locate the signed acceptance records from Chapters 3, 8, and 15. If any is missing or shows an open item, stop this chapter and route the project back to the responsible authority before continuing.
3. Inspect fascia for alignment, sound fastening, decay, damage, and adequate support for the approved hanger system. Record any deficiency and refer correction to Chapter 15 before installing hangers over the affected section.
4. Measure the eave length and identify high point, low point, outlet locations, corners, end caps, expansion joints, and downspout path. Record each location on the installation record using fixed references established from the eave ends.
5. Confirm that the discharge route will not create foundation saturation, erosion, icing, sidewalk hazards, or neighboring-property impacts. Verify the approved discharge location before proceeding, and record the confirmation on the installation record.
6. Establish the required gutter slope using measured high- and low-point references. Calculate and record the required drop from the drainage calculation and the measured eave length.
7. Snap or mark the hanger reference line without placing the gutter above the roof's effective drainage path. Use a chalk line or laser level set to the established slope, and verify the line at both ends and at the midpoint before marking hanger locations.
8. Mark hanger locations according to the product, expected loads, and local conditions. Use the spacing identified in the hanger schedule and mark each location on the fascia along the reference line.
9. Cut gutter sections with the approved tool and remove burrs and sharp edges. Cut to the lengths measured in Step 4, and deburr each cut edge before handling or installation.
10. Prepare outlets, corners, end caps, and expansion components before lifting long sections. Fit and seal these components at a ground-level or bench position where practical, per Manufacturer Instruction Cue requirements.
11. Install sealed end caps and outlet fittings using compatible components and sealant. Apply sealant only at the manufacturer-specified locations and seat each fitting fully before it is installed on the gutter run.
12. Lift and support the first gutter section with the required workers or equipment. Confirm the below-eave exclusion zone is active before lifting, and use the number of workers or lifting equipment specified for the gutter length and material.
13. Fasten hangers into the approved fascia or framing locations without stripping fasteners or deforming the gutter. Drive each fastener to the seating condition specified by the hanger manufacturer, and recheck slope at each hanger before moving to the next.
14. Join additional sections using the manufacturer's lap, connector, rivet, screw, gasket, or sealant method. Complete each joint fully before loading the joint with additional gutter length, and orient laps to shed water in the direction of flow.
15. Maintain the established slope through joints and corners. Recheck the slope reference line after each joint and correct any deviation before continuing to the next section.
16. Install downspout elbows, vertical sections, straps, offsets, and lower discharge fittings. Follow the downspout route identified in Step 4 and fasten straps at the spacing specified by the product instructions.
17. Keep downspouts plumb or aligned to the approved route and maintain required wall clearance. Verify plumb or approved alignment at the top, middle, and bottom of each vertical run before final fastening.
18. Connect downspouts to approved extensions, splash blocks, drains, or underground systems without sealing required cleanouts. Confirm the discharge connection matches the approved discharge location identified in Step 5, and leave every required cleanout accessible.
19. Conduct a controlled water-flow test beginning at the gutter high point. Introduce water at the high point at a rate consistent with the approved test method and observe the full run to the discharge point.
20. Observe slope, standing water, joint leakage, outlet flow, overflow, downspout movement, and discharge performance. Record each observation against the acceptance standards in Section C above.
21. Correct reverse slope, low spots, leaking joints, loose hangers, blocked outlets, and unsafe discharge. Complete only the corrections identified as deficiencies during the test, and repeat the controlled water-flow test on the corrected section.
22. Clean the system and document dimensions, slope, hanger spacing, outlet locations, discharge route, and test results. Remove cutoffs, fasteners, and debris from the gutter run and below-eave area, and complete the installation record before closing out the chapter.