Gutter Guard installation brief Scope of Work.docx

Gutter Guard installation brief Scope of Work Date: 10-08-2026 Prepared by: Azeb Hailu The Scope of work should meet requirements based on the following DoW/ US Navy specifications and gridlines and national standards:

UFC 3-110-03: Roofing UFC 1-200-01: DoD Building Code UFC 3-301-01: Structural Engineering UFGS 07 71 00: Roof Specialties and Accessories UFGS 07 60 00: Flashing and Sheet Metal UFGS 01 33 00: Submittal Procedures SMACNA: Architectural Sheet Metal Manual (7th Edition), Chapter 1 (Gutters and Downspouts).

ASCE/SEI 7: Minimum Design Loads and Associated Criteria for Buildings and Other Structures (wind and snow load provisions).

ASTM A240/A240M: Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip.

ASTM B209: Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate.

ASTM B370: Standard Specification for Copper Sheet and Strip for Building Construction.

Based on these standards the gutter guard must meet the minimum requirements of the following:

1. must consist of rigid metallic frames supporting heavy-duty mesh screens designed to prevent pine needles, oak tassels, deciduous leaf debris, and pests from entering gutters while permitting maximum hydraulic transfer.

1. Components must exhibit high corrosion resistance. All raw cut edges, fasteners, and mesh frames must pass a minimum 1,000-hour salt spray test per ASTM B117 without blistering, flaking, pitting, or red rust.

1. Assemblies must be engineered and mechanically secured to resist wind forces determined in accordance with ASCE 7, Min 115mph (This will depend on the location of the Base. Waterfront is much windier). Friction-only or press-fit friction tabs without mechanical fastener backups are strictly prohibited in exterior wind-exposed areas.

1. Minimum water throughput capacity: 150 inches of rainfall per hour.

1. Assemblies must accommodate linear thermal expansion and contraction over an ambient range of -10°F to 110° shearing fasteners.

1. Plastic, PVC, vinyl, nylon, and open-cell polyether/polyurethane foam inserts are prohibited.

Approved materials are:

1. Stainless Steel Micro-Mesh with Extruded Aluminum Subframe

1. Heavy-Duty Perforated Sheet Metal Guards (Matched Metal System)

1. Wire Downspout strainers- Mandatory at all outlets:

A) Regardless of whether continuous surface guards are installed, every downspout outlet drops/collector head must be fitted with an engineered wire strainer.

B) Removable balloon-type or beehive-type wire basket designed with compressible tapered prongs that slide securely into downspout drops.

1. Fasteners must be self-drilling, self-tapping screws with neoprene or EPDM sealing washers.

1. Contractor shall inspect existing gutters and fascia boards prior to installation. Verify that gutters are sloped continuously toward downspouts at a minimum rate of 1/16 inch per foot (1:192) without low pockets or ponding water.

1. Contractor shall completely flush and scrape all accumulated silt, biological growth, pine needles, and metal shavings from existing troughs and downspouts prior to fitting guards.

1. Any tree canopies or overhanging limbs within 10 feet of the roof perimeter have been trimmed back in accordance with NAVFAC Grounds Maintenance instructions.

1. Submittals:

A) Fastening schedules, attachment clip spacings, and expansion joint locations.

B) Wind-uplift engineering details verifying resistance to site-specific basic wind speed per ASCE 7. (This can be manufacturer’s specification) C) One 12-inch full-scale physical sample of each gutter screen/guard type proposed, complete with mounting clips, joining splices, and specified fasteners.

D) Materials specification

1. Quality control: This item should be developed at the time of contract specification development.

1. Contractor’s qualifications: The contractor must be qualified under NAICS 238160 (Roofing Contractors) or NAICS 238170 (Siding & Sheet Metal Contractors), or operate as an approved specialty subcontractor under a general construction prime (NAICS 236220)

1. Cost Estimate: The total cost (IGE) for the installation of DoW standard gutter guard for 3000 LF is $321,421 which means $107.14 per Liner feet.

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Gutter guard installation.pdf

ESTIMATE FOR CONSTRUCTION CONTRACT DATE: 8 Oct 26

CONTRACT TITLE: Gutter Guard Eproject #:

FEAD OFFICE: NWS Earle

DESCRIPTION: Gutter Guard installation PRIME CONTRACTOR'S WORK Remarks:

1. Direct Materials 800.00$

2. Sales Tax on Materials 0.0% of line 1 0.00% -$

3. Direct Labor 7,650.00$

4. Insurance, Taxes, and Fringe Benefits 35.0% of line 3 35.00% 2,677.50$

5. Rental Equipment -$

6. Sales Tax on Rental Equipment 0.0% of line 5 0.00% -$

7. Equipment Ownership and Operating Expenses -$

8. SUBTOTAL (add lines 1 - 7) $ 11,127.50

9. Field Overhead (Direct Cost over time) 10.0% 10.00% 1,112.75$

10. SUBTOTAL (Add Lines 8 & 9) 12,240.25$

Prime Remarks:

SUBCONTRACTOR'S WORK

11. Direct Materials 41,700.00$

12. Sales Tax on Materials 0.0% of line 11 0.00% -$

13. Direct Labor 73,740.00$

14. Insurance, Taxes, and Fringe Benefits 35.0% of line 13 35.00% 25,809.00$

15. Rental Equipment 16,020.00$

16. Sales Tax on Rental Equipment 0.0% of line 15 0.00% -$

17. Equipment Ownership and Operating Expenses -$

18. SUBTOTAL (add lines 11 - 17) $ 157,269.00

19. Field Overhead 10.0% of line 18 10.00% 15,726.90$

20. Home Office Overhead 3.0% of line 18+19 3.00% 5,189.88$

21. SUBTOTAL (add lines 18, 19, & 20) $ 178,185.78

22. Profit (as determined) 7.0% 7.00% 12,473.00$

23. SUBTOTAL of Individual Subcontractor Proposals 190,658.78$

Sub's Remarks:

24. Prime Contractor's Work (from line 12) 12,240.25$

25. Sub-contractor's Work (from line 25) 190,658.78$

26. SUBTOTAL (add lines 26 & 27) 202,899.03$

27. 5.0% of line 27 5.00% 9,532.94$

28. Prime's Home Office Overhead 3.0% of line 26 3.00% 367.21$

29. Prime's Profit 5.8% of line 28 5.75% 11,666.69$

30. SUBTOTAL (add lines 26 - 29) 224,465.87$

31. Prime Contractor's Bond Premium 2.0% of line 32 2.00% 4,489.32$

32. SUBTOTAL (Add Lines 30 & 31) 228,955.19$

33. of line 34 0.00% -$

34. TOTAL COST (Add Lines 30 & 31) 262,153.69$ base access 7% of the labor 5,697.30$

267,850.99$

Estimated time extension and justification

CONTINGENCE 20% 53,570

TOTAL 321,421

Prime Contractor name:

Subcontractor name:

Notes:

This estimate is based on Market research and RSM

Signature & Title of preparer Date:

Azeb Hailu, P.E. 10/8/2026 Engineering Tech.

Prime's Overhead on subcontractor