27-0001 Attachment L - Davison Assessment Report.pdf
PDF 2 MB Posted
- Solicitation number
- RFP DET 260000002534 1
- Issued by
- Wayne County, Detroit City, Michigan
About this file
This is a Davison Assessment Report prepared for Detroit Public Schools regarding the roof system at Davison Elementary School located at 2800 E. Davison Street, Detroit, Michigan. The visual inspection, conducted on March 4, 2026, evaluated the remaining useful life of the existing roof system across ten identified roof areas (A through K). The assessment covers approximately 32,219 square feet of roofing and identifies specific recommendations for each area. Roof Areas A, B, C, and D require complete removal and replacement with new self-adhering underlayment, polyiso insulation layers, and 60-mil EPDM membrane. Roof Areas E, F, and I require similar removal and replacement with tapered polyiso and 60-mil EPDM membrane. Roof Area H, consisting of asphalt shingles on wood decking, requires removal and replacement with new underlayment and asphalt shingles. Roof Areas G and J are identified on the roof plan but lack detailed area descriptions.
The estimated construction cost for the recommended roof replacement project, including R-30 insulation system with fully-adhered 60-mil EPDM membrane and shingles, is $942,643.00. The assessment notes that all existing roof systems were installed prior to 1995 and identifies multiple areas of severe deterioration including failed sealants, membrane deterioration, exposed felts, compromised flashing, deteriorated fascia, and failed drain pans. The remaining life of the existing roof systems was based on estimated age, visual inspection observations, and the assumption that no maintenance has been performed on the systems.
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Text version
Detroit Public Schools – Davison Elementary School
2800 E. Davison Street Detroit, MI 48212
March 4th, 2026
Detroit Public Schools – Davison Elementary School
Table of Contents
Executive Summary Page 3
Roof Plan Page 4
Roof Area Descriptions Page 5
Roof Area Photos Page 8
EXECUTIVE SUMMARY
On March 4, 2026 a visual inspection of the existing roof system was performed. The purpose of this inspection was to determine the estimated surface life left of the existing roof system. Roof Areas A, B, C, D, E, F, G, I, J & K existing systems consisted of an existing BUR aggregate surface, 1-inch fiber glass insulation over concrete deck Roof Area H consists of asphalt shingles, underlayments and wood deck
Observations & Recommendations:
Roof Areas A, B, C & D: Remove existing roof system down to the existing structural concrete deck.
Install new self-adhering underlayment, 2-layers of 2-1/2 inch polyiso, 1/2-inch high density polyiso and a fully adhered 60-mil EPDM membrane.
Roof Areas E, F & I: Remove existing roof system down to the existing structural concrete deck.
Install new self-adhering underlayment, one layer of 2-1/2 inch polyiso, 1/8-inch per foot tapered polyiso, 1/2-inch high density polyiso and fully-adhered 60-mil EPDM membrane.
Roof Area H: Remove existing roof system down to the existing structural wood deck. Install new self-adhering underlayment and asphalt shingles.
Estimated Construction Costs:
R-30 Insulation System with a fully-adhered 60-mil EPDM & Shingles: $942.643.00
ROOF PLAN:
Note: Remaining life of existing roof systems is based on the estimated age of the roofs, visual inspection and assuming no maintenance being performed.
ROOF AREA DESCRIPTIONS:
Roof Area ID: A
Size: 11,125 sf.
Year Installed: Pre 1995
Height: 35 ft
Structural Slope: 1/4 per foot min.
Drainage: Roof Drains
Roof Area ID: B
Size: 3,594 sf.
Year Installed: Pre 1995
Height: 35 ft.
Structural Slope: 1/4 per foot.
Drainage: Eave Edge
Roof Area ID: C
Size: 13,951 sf.
Year Installed: Pre 1995
Height: 35 ft.
Structural Slope: 1/8 per foot min.
Roof Area ID: D
Size: 625 sf.
Year Installed: Pre 1995
Height: 9 ft
Structural Slope: 1/4" per foot.
Drainage: Gutters
Roof Area ID: E
Size: 155 sf.
Year Installed: Pre 1995
Height: 20 ft.
Structural Slope: None
Roof Area ID: F
Size: 493 sf.
Year Installed: Pre 1995
Height: 12 ft.
Structural Slope: 1/8” per foot.
Roof Area ID: G
Size: 299 sf.
Year Installed: Pre 1995
Height: 31 ft
Structural Slope: 1/8” per foot.
Roof Area ID: H
Size: 100 sf.
Year Installed: Pre 1995
Height: 30 ft.
Structural Slope: 5:12
Roof Area ID: I
Size: 1,977 sf.
Year Installed: Pre 1995
Height: 31 ft.
Structural Slope: 1/8” per foot
Drainage: Roof Drain
ROOF AREA PHOTOS:
Open flashing Failed sealnt
Severe flashing deterioration
Severe membrane deterioration felts showing
Severe flashing deterioration
Severe deterioration at perimeter edge
Deteriorated wood fascia Severe membrane deterioration
Membrane deterioration at drain
Failed stone coping joint
Severe membrane deterioration
Drain pan split open
File details come from the government source that posted it. Updated .