WRECORP (Western Roof Evaluation Corporation)

6829 W. Corrine Drive, Peoria, AZ 85381

(623) 878-7117 / info@wrecorp.com

February 18, 2020 Vernita James Ganado Unified School District Purchasing Agent PO Box 1757 Ganado, AZ 86505 Project Description

Roofing Assessment Report:

Ganado Primary School Hwy 264 & Navajo Route 1 Ganado, AZ 86505 Building 1004 Ms. James, Per our agreement WRECORP conducted a roof assessment on February 13, 2020 of the above listed facility. The objective of the roof evaluation was to determine the viability of the existing roof systems and to note any and all deficiencies and provide recommendations for restoration or replacement. The report includes photographs, core samples, and moisture readings to document our findings. Buildings consists of the following: SFB-1004 Roof Assessment Summary: Single Ply Roofing - SFB-1004 - Roof Section 1 & 3 The age of the TPO single ply roof system is estimated at 13 years per the renovations listed on the SFB website. Minor leaks are reported beneath the TPO single ply roof sections at this time. Leaks are most likely due to deteriorating penetration sealants. The TPO single ply membrane is mechanically fastened over 1 layer of 1/2" Densdeck over 2”polyisocyanurate insulation over vapor barrier over 3/4” gypsum board over the metal deck and is approximately 10,262 square feet The current life expectancy of the single ply roof system is 8-10 years. Metal Standing Seam Roofing – SFB-1004 – Roof Section 2 The age of the metal standing seam system is estimated at 27 years. The metal standing seam panels are installed over asphalt underlayment over a sloped metal deck and is approximately 70,605 square feet. The asphalt underlayment is near the end of useful life. Systemic leaks are reported beneath the metal standing seam roof sections at this time. The current life expectancy of the single ply roof system is 1-2 years.

Fiberglass Skylight System– SFB-1004 The age of the fiberglass skylight system is estimated at 27 years. The fiberglass panels are aged and appear to have damage from hail strikes. The current life expectancy of the fiberglass skylight system is 1-2 years. Approximately 3,718 square feet

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TPO Roof Assembly 1 Metal Decking 2 2” Polyisocyanurate 3. 1/2" Cover Board 4 TPO Membrane

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2

1

Metal Standing Seam

Moisture Barrier

Insulation

Aluminum Post

Moisture Layer

Fastening Clips

Decking

Metal Standing Seam

1 Metal Decking 2 Moisture Barrier 3 Metal Standing Seam

Conclusions: Single Ply Roofing - SFB-1004 - Roof Section 1&3

• The structure was built in 1993 and consist of painted CMU walls and metal roof decks. • Consist of one roof section. • Roof system is TPO single ply over sloped metal decks. • The roof slopes vary from 1/4” to 1/2" per foot. • Drainage: Roof systems drain to the perimeters • Roof Age: Approximately 13 years old. • Condition: Maintainable • Life expectancy: 8-10 years • Warranty: Unknown

Metal Standing Seam Roofing – SFB-1004 – Roof section 2

• The structure was built in 1993 and consist of painted CMU walls and metal roof decks. • Consist of one roof section. • Roof system consists of metal standing seam panels over asphalt underlayment over a sloped

metal deck. • The roof slope is 2.5/12 • Drainage: The roof system drains to the perimeter edge. • Roof Age: Approximately 27 years old. • Condition: Poor • Life expectancy: 0-1 years • Warranty: Unknown

Fiberglass Skylight System– SFB-1004 • The structure was built in 1993 and consist of painted CMU walls and metal roof decks. • Consist of 5 Skylight panel sections. • Roof systems are fiberglass skylight panels set in frames.

1 Fiberglass Skylight 2 Skylight Frame 3 Base Flashings

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1

1

• The roof slope is 5.5/12 • Drainage: Skylight panels drain to the perimeter edge. • Roof Age: Approximately 27 years old. • Condition: Poor • Life expectancy: 1-2 years • Warranty: Unknown Recommendations: Single Ply Roofing - SFB-1004 - Roof Section 1 The existing single ply roof system is in fair condition and requires repairs and maintenance at perimeters and penetrations to keep the roof section water tight. Metal Standing Seam Roofing – SFB-1004 – Roof section 2 The existing metal standing seam system is in poor condition and should be replaced. Fiberglass Skylight System– SFB-1004 The existing fiberglass skylight system is in poor condition and the skylight panel system should be replaced. Budget: Single Ply (Roofs 1 &3) – Repair & Maintenance $7,500.00 Skylights – Replacement - $20,000.00 Metal Standing Seam (Roof 2)

Option 1 – Replace with a Ribbed Single Ply Roof System $850,000.00 Option 2 – Replace with a new Metal Standing Seam Roof System $1,270,900.00

SFB # 1004

Photo # 1

Description: Site Identification: Ganado Primary School - Hwy 264 & Navajo Route 1, Ganado, AZ 86505

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Skylight

Skylight

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Description: The interior of the buildings were walked with facility personnel noting systemic evidence of water intrusion at perimeter walls, and penetrations locations.

Photo # 3

Description: The interior of the buildings were walked with facility personnel noting systemic evidence of water intrusion at perimeter walls, and penetrations locations.

Photo # 4

Description: The interior of the buildings were walked with facility personnel noting systemic evidence of water intrusion at perimeter walls, penetrations and drain locations.

Photo # 5

Description: Roof Section 1 - Overview

Photo # 6

Description: Roof Section 1 - Systemic condition of aged and deteriorating draw band sealant that may allow moisture into the structure.

Photo # 7

Description: Roof Section 1 – Systemic condition of aged and deteriorating draw band sealant that may allow moisture into the structure.

Photo # 8

Description: Roof Section 1 – Cold welds at membrane may allow moisture into the structure.

Photo # 9

Description: Roof Section 1 – Split system lines may allow moisture intrusion into the structure. Insulation to be removed at the penetration to allow the lines to be sealed with 1 part urethane sealant.

Photo # 10

Description: Roof Section 1 – The curb extension at 1 mechanical unit does not properly fit the curb resulting in a void that can allow wind-blown rain or snow to enter the structure.

Photo # 11

Description: Roof Section 1- CMU walls above the roof system should have cracks and voids sealed and be painted.

Photo # 12

Description: Roof Section 2 - Overview

Photo # 13

Description: Roof Section 2 – The asphalt underlayment is becoming aged and brittle.

Photo # 14

Description: Roof Section 2 - Penetrations installed without jacks or boots. This will allow moisture into the structure

Photo # 15

Description: Roof Section 2 – Systemic condition of sealant applied at panel laps, penetrations, and valleys.

Photo # 16

Description: Roof Section 2 – Systemic condition of aged and missing perimeter sealants.

Photo # 17

Description: Roof Section 2 – Developing split in the center rib on valley. This will allow moisture into the structure.

Photo # 18

Description: Roof Section 2 – Penetrations installed without jacks or boots. This will allow moisture into the structure

Photo # 19

Description: Roof Section 2 – Poor condition of penetration boots.

Photo # 20

Description: Roof Section 2 – Gutters to be maintained to keep free of debris, gutter lap sealant is aged and deteriorating and should be replaced.

Photo # 21

Description: Fiberglass Skylight Units - Overview

Photo # 22

Description: Fiberglass Skylight Units – Systemic condition of aged and missing sealants at the skylight panels to frames.

Photo # 23

Description: Fiberglass Skylight Units – Systemic damage to fiberglass panels from hail strikes.

Photo # 24

Description: Fiberglass Skylight Units – Poor condition of fiberglass panels. Skylights are currently leaking.

NGanado Primary SchoolUS-191Ganado, AZ 86505Flat: 10,262 SqFtPitched: 70,605 SqFtSkylights: 3,718 SqFt

Metal Roof

Single Ply Roofs

Skylight

NGanado Primary SchoolUS-191Ganado, AZ 86505Flat: 10,262 SqFtPitched: 70,605 SqFtSkylights: 3,718 SqFt

Leak Locations

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Facility Name / Number: Ganado Primary School SFB # 1004 Roof Sections #:

Date of Inspection:

Highway 264 & Navajo Route 1 Ganado, AZ 86505

Single Ply Roofs 1 & 3

2-13-20

Year Building

Built:

1993 Roof Square Footage: 10,262

Roofing System Type: Single Ply Drainage Adequate: ☒ Yes / ☐ No

Currently Leaking: ☒ Yes / ☐ No

Manufacturer: Unknown History of Leaks: ☒ Yes / ☐ No

Deck Type: Metal # of Drains: N/A

Roof Access: Roof hatch Size of Drains: N/A

Roof Slope: 1/4"-1/2” # of Scuppers: N/A

Roof Height from ground: 24’ Size of Scuppers: N/A

Wall Height from ground: Screen Wall - 27’ Coping Type: N/A

Wall Type: CMU Coping Condition: N/A

Wall Cladding: Paint Expansion Joint L/F: N/A

Year Last Roof Installed: 2006 Below deck Insulation: R-30

Projected Design Life of Existing Roof (years): 20 Life Remaining of Existing Roof (Years): 10

Core System Type

(Ex: BUR, Foam Single Ply, Mod Bit.) Layer Description

(Ex: Fiberglass, TPO, APP) Attachment Method

(Ex: Hot Asph., Adhered, Mech. Attached)

Single Ply over 1/2" Densdeck over 2” polyiso over vapor barrier over 3/4” gypsum board over metal deck

Current Weight of Roof System by Square Foot: 1.25#

Current Condition: ☐ 0 – Critical ☐ 25 – Urgent ☐ 50 – Poor ☐ 75 – Fair ☒ 100 - Maintainable

KEY - Roof Condition Index:

0 – Critical: Roof system is a total failure and is leaking throughout causing major damage inside the structure. Roof system needs to be replace as soon as possible.

25 – Urgent: Roof system is failing and leaking is significant causing moderate damage inside the structure. Roof system needs to be replaced as soon as possible.

50 – Poor: Roof system has major issues and some leaking is occurring. Leaks are causing minor damage inside the structure. Roof system needs to be restored or replaced soon.

75 – Fair: Roof system has some minor damage and needs only minor repairs and maintenance. Roof needs to be repaired and maintenance soon.

100 – Maintainable: Roof is in good shape and needs only annual maintenance at this time.

Recommended Corrective Action Year

Action: ☐ Maintain ☐ Repair ☒ Repairs & Maintenance ☐ Restore ☐ Recover ☐ Replace 2020

Urgency: ☐ Low ☒ Moderate ☐ High ☐ Critical

KEY – Urgency Index

Low: Action can be safely postponed or scheduled routinely (2-3 years) to meet the facility management/ owner’s available resources, schedule and capabilities with minor impact to the overall condition of the roof system. Roof conditions and recommended corrective actions need to be monitored and reclassified to reflect any changes.

2

Moderate: Action needs to be completed within a short frame of time (1-2 years) to maintain the integrity and life

span of the roofing system.

High: Priority scheduling of action (within a 6-12 months) is required to maintain, prevent further damage, or

additional property loss due to current conditions.

Critical: Immediate (0 months) action is required to prevent additional damage/loss of property.

Roof Replacement - New system type: Restoration or Repair Description:

Repair & Maintenance

Cost: $ Year: Cost: $ 7,500.00 Year: 2020

Access & Staging Issues: Working Hours: TBD

Working Days: TBD

Other Trades Needed for Project

Mechanical: No

Electrical: No

Plumbing: No

Communication: No

Solar: No

General Contractor: No

Current Warranties

Manufacturer: Unknown

Years:

Type:

Expires:

Contractor:

Years:

Facility Name / Number: Ganado Primary School SFB # 1004 Roof Sections #:

Date of Inspection:

Highway 264 & Navajo Route 1 Ganado, AZ 86505

Skylight Panels 2-13-20

Year Building

Built:

1993 Roof Square Footage: 3,718

Roofing System Type: Fiberglass Skylights Drainage Adequate: ☒ Yes / ☐ No

Currently Leaking: ☒ Yes / ☐ No

Manufacturer: Unknown History of Leaks: ☒ Yes / ☐ No

Deck Type: N/A # of Drains: N/A

Roof Access: Need ladder / Roof hatch Size of Drains: N/A

Roof Slope: 5.5/12 # of Scuppers: N/A

Roof Height from ground: 11’ at eave Size of Scuppers: N/A

Wall Height from ground: N/A Coping Type: N/A

Wall Type: CMU Coping Condition: N/A

Wall Cladding: Paint Expansion Joint L/F: N/A

Year Last Roof Installed: 1993 Below deck Insulation: N/A

Projected Design Life of Existing Roof (years): 30 Life Remaining of Existing Roof (Years): 1-2

Core System Type

(Ex: BUR, Foam Single Ply, Mod Bit.) Layer Description

(Ex: Fiberglass, TPO, APP) Attachment Method

(Ex: Hot Asph., Adhered, Mech. Attached)

Fiberglass Skylight System

Current Weight of Roof System by Square Foot: Unknown

Current Condition: ☐ 0 – Critical ☐ 25 – Urgent ☒ 50 – Poor ☐ 75 – Fair ☐ 100 - Maintainable

KEY - Roof Condition Index:

0 – Critical: Roof system is a total failure and is leaking throughout causing major damage inside the structure. Roof system needs to be replace as soon as possible.

25 – Urgent: Roof system is failing and leaking is significant causing moderate damage inside the structure. Roof system needs to be replaced as soon as possible.

50 – Poor: Roof system has major issues and some leaking is occurring. Leaks are causing minor damage inside the structure. Roof system needs to be restored or replaced soon.

75 – Fair: Roof system has some minor damage and needs only minor repairs and maintenance. Roof needs to be repaired and maintenance soon.

100 – Maintainable: Roof is in good shape and needs only annual maintenance at this time.

Recommended Corrective Action Year

Action: ☐ Maintain ☐ Repair ☐ Repairs & Maintenance ☐ Restore ☐ Recover ☒ Replace 2021

Urgency: ☐ Low ☒ Moderate ☐ High ☐ Critical

KEY – Urgency Index

Low: Action can be safely postponed or scheduled routinely (2-3 years) to meet the facility management/ owner’s available resources, schedule and capabilities with minor impact to the overall condition of the roof system. Roof conditions and recommended corrective actions need to be monitored and reclassified to reflect any changes.

2

Moderate: Action needs to be completed within a short frame of time (1-2 years) to maintain the integrity and life

span of the roofing system.

High: Priority scheduling of action (within a 6-12 months) is required to maintain, prevent further damage, or

additional property loss due to current conditions.

Critical: Immediate (0 months) action is required to prevent additional damage/loss of property.

Roof Replacement - New system type: Restoration or Repair Description:

Replace Skylights

Cost: $ 20,000.00 Year: 2021 Cost: $ Year:

Access & Staging Issues: Working Hours: TBD

Working Days: TBD

Other Trades Needed for Project

Mechanical:

Electrical:

Plumbing:

Communication:

Solar:

General Contractor:

Current Warranties

Manufacturer: Unknown

Years:

Type:

Expires:

Contractor:

Years:

Facility Name / Number: Ganado Primary School SFB # 1004 Roof Sections #:

Date of Inspection:

Highway 264 & Navajo Route 1 Ganado, AZ 86505

Standing Seam 2-13-20

Year Building

Built:

1993 Roof Square Footage: 70,605 SqFt

Roofing System Type: Standing Seam Drainage Adequate: ☒ Yes / ☐ No

Currently Leaking: ☒ Yes / ☐ No

Manufacturer: Unknown History of Leaks: ☒ Yes / ☐ No

Deck Type: Metal # of Drains: N/A

Roof Access: Need ladder Size of Drains: N/A

Roof Slope: 2.5/12 # of Scuppers: N/A

Roof Height from ground: 11’ at eave Size of Scuppers: N/A

Wall Height from ground: N/A Coping Type: N/A

Wall Type: CMU Coping Condition: N/A

Wall Cladding: Paint Expansion Joint L/F: N/A

Year Last Roof Installed: 1993 Below deck Insulation: R-30

Projected Design Life of Existing Roof (years): 40 Life Remaining of Existing Roof (Years): 0-1

Core System Type

(Ex: BUR, Foam Single Ply, Mod Bit.) Layer Description

(Ex: Fiberglass, TPO, APP) Attachment Method

(Ex: Hot Asph., Adhered, Mech. Attached)

Standing Seam panels over asphalt underlayment over metal deck

Current Weight of Roof System by Square Foot: 1.50#

Current Condition: ☐ 0 – Critical ☐ 25 – Urgent ☒ 50 – Poor ☐ 75 – Fair ☐ 100 - Maintainable

KEY - Roof Condition Index:

0 – Critical: Roof system is a total failure and is leaking throughout causing major damage inside the structure. Roof system needs to be replace as soon as possible.

25 – Urgent: Roof system is failing and leaking is significant causing moderate damage inside the structure. Roof system needs to be replaced as soon as possible.

50 – Poor: Roof system has major issues and some leaking is occurring. Leaks are causing minor damage inside the structure. Roof system needs to be restored or replaced soon.

75 – Fair: Roof system has some minor damage and needs only minor repairs and maintenance. Roof needs to be repaired and maintenance soon.

100 – Maintainable: Roof is in good shape and needs only annual maintenance at this time.

Recommended Corrective Action Year

Action: ☐ Maintain ☐ Repair ☐ Repairs & Maintenance ☐ Restore ☐ Recover ☒ Replace 2021

Urgency: ☐ Low ☒ Moderate ☐ High ☐ Critical

KEY – Urgency Index

Low: Action can be safely postponed or scheduled routinely (2-3 years) to meet the facility management/ owner’s available resources, schedule and capabilities with minor impact to the overall condition of the roof system. Roof conditions and recommended corrective actions need to be monitored and reclassified to reflect any changes.

2

Moderate: Action needs to be completed within a short frame of time (1-2 years) to maintain the integrity and life

span of the roofing system.

High: Priority scheduling of action (within a 6-12 months) is required to maintain, prevent further damage, or

additional property loss due to current conditions.

Critical: Immediate (0 months) action is required to prevent additional damage/loss of property.

Roof Replacement - New system type: Restoration or Repair Description: Replace Roof System with a Ribbed Single Ply Roof System

Cost: $ 850,000.00 Year: 2021 Cost: $ Year:

Access & Staging Issues: Working Hours: TBD

Working Days: TBD

Other Trades Needed for Project

Mechanical: Yes

Electrical: Yes

Plumbing: Yes

Communication: No

Solar: No

General Contractor: Possible

Current Warranties

Manufacturer: Unknown

Years:

Type:

Expires:

Contractor:

Years: