Questions_and_Responses_08302017.pdf

QUESTIONS AND ANSWERS

REPAIR ROOFS, PHASE I - FCI BECKLEY

IFBP01031700001 - PROJECT 1B7X

SUBMITTED BY TRG, LLC:

1. Will we be allowed to store gang boxes on the roof over night if they are secured?

CLARIFICATION: NO STORAGE WILL BE ALLOWED ON THE ROOF OF THE BUILDING.

2. Will there be a lay down or storage area for materials outside of the complex?

CLARIFICATION: SEE SECTION 011000, ARTICLE 1.10 AND SECTION 015000, ARTICLE 2.1.

3. Is it acceptable to leave a roof hoist on the roof overnight?

CLARIFICATION: NO TOOLS OR EQUIPMENT WILL BE LEFT ON THE ROOF OVERNIGHT.

4. The existing lightening protection system, as is, may not be certifiable. How will the extra work required to bring it to code be addressed if required?

CLARIFICATION: IT IS NOT A REQUIREMENT FOR AN EXISTING NON-COMPLIANT SYSTEM TO BE

BROUGHT UP TO CODE. THE SCOPE IS TO REMOVE, REINSTALL, INSPECT, AND PROVIDE AN

INSPECTION REPORT, AS INDICATED IN SECTION 264113.

5. Where will gasoline and oil essential to the equipment used in construction be stored?

CLARIFICATION: ALL GASOLINE AND OIL FOR EQUIPMENT WILL BE TAKEN OUT OF THE REAR

GATE AT THE END OF WORK DAILY.

6. Will the foreman on site be permitted to carry a cellphone for emergency calls only? If not please clarify our options for communications.

CLARIFICATION: REFER TO SECTION 011000, ARTICLE 1.8.F. CELL PHONES ARE NEVER

ALLOWED TO BE CARRIED IN ANY PRISON. SHOULD A PERSON REQUIRE THE USE OF A

TELEPHONE, THEY CAN COMMUNICATE WITH THE ESCORT ON SITE, WHO WILL ARRANGE THE USE

OF A TELEPHONE.

7. Can the completion time be extended to 270 days? The current duration may not be feasible due to site conditions.

CHANGE: AN AMENDMENT WILL BE ISSUED TO EXTEND THE PERFORMANCE PERIOD TO 270

CALENDAR DAYS DUE TO THE WINTER MONTHS.

8. Please provide pictures of our designated laydown area.

CLARIFICATION: AS INDICATED IN SECTION 015000, ARTICLE 2.1, THE AREA WILL BE NEAR

BUILDING CP.1, WHICH IS IDENTIFIED ON SHEER 00-G004.

9. Please confirm that the prison will move our dumpster in and outside of the gate each as discussed at the prebid.

CLARIFICATION: FCI BECKLEY WILL BE RESPONSIBLE TO MOVE ALL DUMPSTERS IN AND

OUTSIDE OF THE REAR SALLYPORT. ALL DUMPSTERS MUST SIT FOR A SPECIFIED PERIOD IN

THE SALLYPORT BEFORE BEING RELEASED OUTSIDE FOR REMOVAL.

10. Please confirm the composition (core cut) of each roof area.

CLARIFICATION: THE ARCHITECT’S ROOF ASSESSMENT AND MOISTURE SURVEY REPORT IS

ATTACHED FOR REFERENCE ONLY. THE CONDITIONS IDENTIFIED IN THE REPORT ARE NOT

GUARANTEED.

11. Please confirm the available work hours for our crew to enter through both the front lobby and materials through the rear gate.

CHANGE: REFER TO SECTION 011000, ARTICLE 1.8.B. EMPLOYEES WILL BE ESCORTED IN THE

FRONT LOBBY AT 7:30 AM AND EXIT NO LATER THAN 3:30 PM. MATERIALS CAN BE BROUGHT

THROUGH REAR GATE 8:00 AM AND MUST BE TAKEN OUT THE REAR GATE BY 3:00 PM. THE

HOURS FOR THE REAR GATE WILL BE INCLUDED IN A FORTH COMING AMENDMENT.

12. The roofing installer’s warranty referenced in spec section 075216 3.12 asks for wind coverage up to 110 MPH. The roofing system does not appear to be designed for that wind speed. Please clarify the roofing contractor will be asked to provide wind speed coverage above and beyond what the manufacturer will provide.

CLARIFICATION: THE DRAWINGS AND SPECIFICATIONS ARE CORRECT. IF A PARTICULAR

MANUFACTURER HAS A DIFFERENT OR PROPRIETARY DETAIL THAT NEEDS TO BE USED TO

ACCOMMODATE THE 110 MPH WINDS AND STILL PROVIDE THE REQUIRED WARRANTY, THEN

CONTRACTOR SHOULD IDENTIFY THAT IN THEIR BID.

13. Is intent of installing duct, pipe or electrical extensions to accommodate for new flashing heights? If so, can these be deleted if the roofing manufacturer authorizes lower flashing heights and issues the warranty as is?

CLARIFICATION: THE INTENT OF EXTENSIONS IS TO ACCOMMODATE INCREASED THICKNESS OF

INSULATION AND MINIMUM FLASHING HEIGHT REQUIRED. EXTENSIONS ARE REQUIRED.

SUBMITTED BY DISTRICT VETERANS CONTRACTING:

1. Will we be allowed to store gang boxes on the roof over night if they are secured?

SEE RESPONSE ABOVE.

2. Will there be a lay down or storage area for materials outside of the complex?

SEE RESPONSE ABOVE.

3. Is it acceptable to leave a roof hoist on the roof overnight?

4. The existing lightening protection system, as is, may not be certifiable. How will the extra work required to bring it to code be addressed if required?

SEE RESPONSE ABOVE.

5. Where will gasoline and oil essential to the equipment used in construction be stored?

SEE RESPONSE ABOVE.

6. Will the foreman on site be permitted to carry a cellphone for emergency calls only? If not please clarify our options for communications.

SEE RESPONSE ABOVE.

7. Can the completion time be extended to 270 days? The current duration may not be feasible because of site conditions such as limited time on site during duty day hours due to the stringent requirements for daily site access including arrival and departure.

SEE RESPONSE ABOVE.

8. Can you provide pictures of our designated laydown area?

SEE RESPONSE ABOVE.

9. Can you confirm that the prison will move our dumpster in and outside of the gate each as discussed at the pre-bid?

SEE RESPONSE ABOVE.

10. Can you confirm the composition (core cut) of each roof area?

SEE RESPONSE ABOVE.

11. Can you confirm the available work hours for our crew to enter through both the front lobby and materials through the rear gate?

SEE RESPONSE ABOVE.

12. The roofing installer’s warranty referenced in spec section 075216 3.12 asks for wind coverage up to 110 MPH. The roofing system does not appear to be designed for that wind speed. Can you clarify the roofing contractor will be asked to provide wind speed coverage above and beyond what the manufacturer will provide?

13. Is intent of installing duct, pipe or electrical extensions to accommodate for new flashing heights? If so, can these be deleted if the roofing manufacturer authorizes lower flashing heights and issues the warranty as is?

SEE RESPONSE ABOVE.

14. Can you provide pictures of the underside (from the ceiling) of the units that are to be raised up for the accommodation of the new roof installation?

CLARIFICATION: THE PICTURES ARE ATTACHED.

15. It was mentioned at the pre-bid that there are more pictures available other than the ones included in the drawings. Can these be made available?

CLARIFICATION: NO. THEY ARE NOT KEYED INTO ANY DRAWINGS OUTSIDE OF WHAT WAS

PREVIOUSLY PUBLISHED

16. Do you know if there is a control system on the HVAC for this project? If so, do you know what brand? (Carrier, Trane, Siemens, Johnson, etc.)

CLARIFICATION: THE CONTROL SYSTEM FOR THE EXISTING HVAC SYSTEM IS TRANE TRACER.

17. It was discussed at the pre-bid that a Sky-track (JLG or other piece of equipment) with a platform could be utilized to place material as well as work force upon the roof as long as it was stored outside of the fenced area at the material laydown area. Can you please confirm this?

CLARIFICATION: A JLG LIFT WILL BE ALLOWED TO PLACE MATERIAL AS WELL AS WORK FORCE

UPON THE ROOF DURING THE WORKING HOURS. IT WILL BE TAKEN OUT THE REAR GATE DAILY

AND STORED OUTSIDE OF THE SECURE PERIMETER AREA.

700 Broadway Street | Cincinnati, Ohio 45202 | O 301.770.3520 | F 301.770.3521 |

September 28, 2016

Federal Bureau of Prisons Mid-Atlantic Regional Office 302 Sentinel Drive, Suite 200 Annapolis Junction, MD 20701

Attn: Ms. Cheryl Brownell, AIA

Subject: Roof Assessment and Moisture Survey Report Schematic Design Phase FCI Beckley – West Virginia

Pursuant to our statement of work, NIKA-KZF JV performed a visual assessment of the applicable low-sloped membrane, shingle, and metal roof areas within the FCI Beckley campus near Beckley, WV. During the assessment, a moisture survey of the membrane roof areas was also conducted. The assessment was performed from September 19th through September 21st, 2016 by Joseph Bass (Registered Roof Consultant) representing NIKA-KZF. The purpose of the assessment and moisture survey was to gather field information (visual and concealed) to determine specific conditions of each roof system and to use that information to develop recommendations for the replacement phase of each.

Twenty (20) photos are made part of this report for reference. Drawings have also been developed and are included to illustrate specific findings and provide an overall summary of each roof area.

MOISTURE SURVEY INSTRUMENTATION & METHODOLOGY

A non-destructive roof moisture survey was performed on each of the major membrane roof areas to locate areas of entrapped moisture within the system (between the membrane and the vapor barrier over the deck). The survey was conducted utilizing a hand-held, non-destructive, electrical impedance moisture meter by Tramex. Exterior roofing surfaces were walked and scanned on 10 foot centers. When a positive reading registered, the area was thoroughly scanned to capture the full extent of the wet area. Investigative cuts were also performed in two areas to confirm the positive readings from the moisture meter and to determine the amount and location of the entrapped moisture.

Our team was unable to perform the moisture survey using an infrared camera due to the makeup of the existing membrane roof system. The absence of a hygroscopic cover board or top layer of insulation prevented moisture from absorbing into the upper layer of the roof insulation system.

Therefore, heat signatures from saturated insulation were not visible. The impedance meter proved successful as it was able to provide readings deeper into the system.

The results gathered from this moisture survey equipment are to be used by the design team as a general locater for moisture within a roofing system and to provide a baseline for possible recover solutions. The results also provide an idea of where structural metal decking may need repairing.

Roof Assessment Report – FCI Beckley Sept. 2016

SUMMARY OF OBSERVATIONS AND FINDINGS

Specific observations and findings of each roof area have been documented on drawings which are attached to supplement this summary (see attached “Field Summary Drawings”).

Membrane Roof Areas (overview photos #1 through #4)

1. Thermoplastic membrane and low-sloped roof assemblies were predominant over the buildings within the “Medium Security” areas. Two small membrane roofs are also located in Roof Area CC within the “Minimum Security” camp area. The membrane was mechanically fastened to the deck through a layer of insulation and a vapor barrier covering the metal deck. The roof membrane appeared to be in fair to moderate condition considering its age (20 years). Certain areas were found to be in worse condition than others, most likely due to more foot traffic over the years in those particular areas. Overall, the membrane appeared to be nearing its final stage of useful life, as the reinforcing fabric was starting to show in a few areas. However, with some specific maintenance to certain items, the membrane roof system as a whole could last a few more years.

2. It was confirmed that the majority of the low-slope membrane areas are sloped by the structure (sloped joists and decking) at 1/8” per foot to the perimeter edges of each building.

The roof systems are primarily drained by internal roof drains with secondary drainage scuppers. There are also a few overflow drains located in select areas. Tapered insulation saddles and crickets are used to create valleys for water flow to the drains along the perimeter edges. The low-slope roofs of Units A1, A2, and A3 were found to be sloped entirely by tapered insulation. In all of the other areas, the insulation system was found to be a single layer of 2½” polyisocyanurate mechanically fastened to the deck (see photo #5).

3. A polyethylene vapor barrier was found under the base insulation layer. The thickness appeared to be 4 to 6 mils (see photo #6).

4. Ponding of rain water was observed on many of the roofs, especially along the perimeter edges where the drains are located. The saddles and crickets appeared to be sloped at ¼” per foot. The saddles were installed in a way that resulted in relatively flat valleys.

5. The penetration flashings such as the plumbing pipe vent boots were found to be in poor condition and are a likely source for water infiltration (see photo #7). This condition was typical on most roof areas.

6. A lightening protection system was found to be installed over a majority of the roof areas.

Cables are adhesively secured to the roof membrane and are clipped to the metal copings.

Rod terminals are located on the tops of exhaust fans and exterior parapet walls.

7. A few overflow scuppers shown on the original drawings were not located in the field assessment. They were not installed during the original construction of the building.

8. Security fencing is mounted along the edges of a few of the membrane roof areas. A chain-link fence system over the handball court area is supported heavily by the parapet walls of Unit O (see photo #8).

9. Grease hood exhaust vents were located above the Food Service area. Grease and contaminants were observed on the roof membrane around one of the fans.

10. Impact damage was evident throughout the roof area over Food Services (Unit S), especially just outside of the access door and stairwell. Other areas included around roof mounted equipment. No walkways or work pads were found around the equipment (see photo #9).

11. A moisture survey was performed on each of the major membrane roof areas to determine areas of entrapped moisture within the system. For the most part, much of the field of each roof area was found to be relatively dry, but moisture was generally found along the perimeter walls on most roof areas. The exception was the roof over Food Services (Unit S), which was found to be saturated over a large section of the roof. Drawings of each area surveyed are attached to this report with illustrations of each area found to contain moisture. Investigative roof cuts were performed in two of the larger wet areas. An analysis revealed that water was holding within the bottom half of the 2½” insulation board, just above the vapor barrier (see photo #10).

Shingle Roof Areas (overview photos #11 through #14)

1. Asphalt shingle roofs and steep-sloped roof assemblies were predominant over the buildings within the “Minimum Security” camp areas. A few shingle roofs are also located within the “Medium Security” area. The shingle roofs with underlayment are mechanically fastened to plywood sheathing. In the Medium Security area, the plywood deck is installed over a structural metal deck assembly. The roof slopes vary from 2.25:12 to 6:12. The shingles appeared to be in moderate condition, with possibly five years of life left.

2. Within the Medium Security shingle roof areas, as-built drawings show the roof insulation to be installed beneath the metal decking above a layer of gypsum sheathing, but this could not be confirmed during the visit.

3. Perforated soffit, gable vents, and ridge vents provide a means for the ventilation of the roof deck assemblies.

4. At many locations, the eave trim (drip edge) and the fascia were found to be a one-piece system (see photo #15).

5. A few fasteners were found penetrating through the upper layer of shingles (see photo #16).

6. Sections of gutter were found throughout the minimum security camp area, but not many in the medium security area. The existing gutters and downspouts were found to be in moderate condition.

Metal Roof Areas (overview photos #17 through #18)

1. The standing seam metal roofs within the medium security areas appeared to be in fair shape. Over the lifespan of the roofs, the color has faded a bit but is to be expected (see photo #19).

2. The metal roof system over the Maintenance shop (Unit V) was assessed. The metal roof was observed to be a hydrostatic, trapezoidal seam panel at 24” wide. The panels spanned across structural purlins at an approximate .5:12 slope. Vinyl-faced insulation was found installed under the panels. A gutter system existed along the two roof eaves (see photo #20).

3. Overall, the roof system over the Maintenance Shop was found to be in fair shape. The metal panels and seams were in good condition. However, the gaskets on the exposed fasteners were found to be deteriorating and in need of sealing or replacing. A few sealant voids were also found at the ridge closures. The pipe flashing boots were also in need of repair.

RECOMMENDATIONS

Based upon the observations during the roof assessment and the findings from the moisture survey, the following recommendations are provided:

Membrane Roof Areas

1. All known penetrations and failed pipe flashings on each roof area should be immediately repaired to stop further water infiltration. This will help to stabilize the overall condition of the roof until large scale replacement and/or repairs can be performed. Left as is, water will continue to enter the roof system and cause further damage to the roof insulation and other building components underneath, including interior spaces.

2. On the low-slope roofs, the large areas noted as “confirmed moisture” within the insulation on the attached roof drawings need to removed and replaced with new insulation material during any future repair / replacement project. The saturated insulation also represents a constant source of moisture that will try to migrate into the building through joints and penetrations of the vapor barrier and metal roof deck.

3. The integrity of the in-place vapor barrier is somewhat unknown, but based upon conversations with facility management personnel, there does not seem to be chronic roof leaks at all of the areas shown as wet on the moisture survey drawings. Therefore, it could be reasonably assumed that the barrier is performing as designed and not allowing moisture through the assembly, at least not in liquid form.

4. Overall, the low-slope roof systems on each of the roof areas appear to have adequate slope in the field of the roof, which is approximately 1/8” per foot. No ponding of water was evident in the field. However, slope enhancements are recommended along the drain lines.

These enhancements are necessary to eliminate ponding water conditions. New tapered saddles are recommended at ½” to 1” per foot installed at a 1:3 ratio (rise : run) to enhance the slope in the valleys.

5. Replacement of the roof system over Food Services is recommended as a priority in the first phase of roof replacement. Due to the area’s saturated condition, the complete removal and replacement of the insulation system is also recommended, along with the vapor barrier.

6. The option to re-use the existing layer of 2½” insulation is available and recommended in a majority of the low-slope roof areas if the Owner would like to save the cost associated with a complete tear-off and replacement. In those dry areas, new insulation can be added along with a high-density cover board to form a solid substrate with an enhanced thermal R-value.

Tapered insulation can be added where needed to enhance slope. A mechanically fastened roof membrane can then be installed over the entire insulation system to ensure adequate securement of the new roof system into the structural deck.

7. The existing roof drainage system appears to be adequate for code minimum requirements.

However, there are a few overflow scuppers that were not installed during original construction and these additions are recommended for adequate secondary drainage.

8. Two membrane roof system options are recommended for the replacement of the low-sloped areas at the facility. The first and most economical membrane system is a reinforced PVC membrane with high-performance KEE polymers. A 60 mil to 80 mil PVC membrane installed over a high-density cover board will provide a solid system with high resistance to grease, most chemicals and acids, UV rays, and ponding water. The standard color is white but the membrane can be manufactured in gray and tan as normal options, which can help to reduce glare. The darker membranes also retain a little more heat from the sun, which can be valuable in the cooler seasons.

The second and more expensive system would be a 2-ply modified bitumen roof system, which would incorporate a mineral surfaced cap sheet. This is the optimum system for resistance to punctures and abrasions, as the overall thickness of the protective membrane assembly can be up to three and four times as thick. However, an asphalt-based system is not as resistant to grease, chemicals, UV rays, or ponding water.

Hybrids of the two systems above are also available to obtain the best characteristics of each system, such as installing a base ply of modified bitumen followed by a top ply of PVC.

9. Whichever new roof system is selected, protective walkways and pads are highly recommended to establish landings and pathways across the roof to equipment that is frequently used or maintained. Excessive traffic can wear down the surface membrane quickly and jeopardize the system.

Shingle Roof Areas

1. All known penetrations and failed pipe flashings on each roof area should be immediately repaired to stop further water infiltration at these areas.

2. The replacement of shingle roofs adjacent to low-sloped membrane areas is recommended when those particular membrane areas are being replaced.

3. 30-year, algae-resistant, laminated architectural shingles are recommended for the replacement of the sloped shingle roof system. Hand nailing is the recommended installation option over pneumatic guns for enhanced quality assurance. Ring-shanked nails at 1½” in length are also recommended.

4. Self-adhered asphalt-based membrane is recommended for the new underlayment, doubled up in the valleys.

5. On the three housing buildings within the medium security area, a gutter and downspout system is recommended at the rear valley discharge points of each building. This would stop the water from free-falling down to the roof and walls below.

Metal Roof Areas

1. The structural integrity of the metal roof system over Maintenance Shop appears to be good.

Therefore, full replacement of the roof panels is not necessary. To enhance the life and weather-tightness of the roof system, a fluid applied coating system is recommended.

During this process, loose fasteners would be replaced and existing fasteners would be sealed, along with all exposed panels seams, flashings, curbs, and penetrations. After the waterproofing portion is complete, a new elastomeric coating would be applied over the entire system, equaling approximately 25 dry mils of thickness. This system, if maintained properly, could provide another 20 years of life for the existing metal roof system. Gutters and downspouts are generally replaced during the coating refurbishment process.

CLOSING

NIKA-KZF JV appreciates the opportunity to provide our professional services to the Federal Bureau of Prisons. If there are any questions regarding this report, or if additional information is required, please advise.

Respectfully, NIKA-KZF JV

Joseph M. Bass, RRC, REWC Registered Consultant Building Envelope Services

Attachments: Photos Site Area Legend

Field Summary Drawings Moisture Survey Drawings

Photo #1: Overview of Units H, I, J, K

Photo #2: Overview of Units O, Q, R

Photo #3: Overview of Unit T

Photo #4: Overview of Unit A3

Photo #5: Roof core – metal deck, vapor barrier, 2.5” insulation, membrane

Photo #6: Polyethylene vapor barrier

Photo #7: Deteriorated pipe boot flashing (typical)

Photo #8: Fencing support brackets mounted to parapet wall coping

Photo #9: No walkways or protective pads around equipment

Photo #10: Plug of wet insulation; saturated in bottom half

Photo #11: Overview of Unit CC

Photo #12: Overview of Unit CH2

Photo #13: Overview of Units B and D

Photo #14: Overview of Unit A3

Photo #15: Typical metal edge and fascia at roof eaves (one piece)

Photo #16: Fasteners penetrating through shingles

Photo #17: Overview of Unit V

Photo #18: Overview of Unit V

Photo #19: Typical condition of standing seam metal roofs at decorative towers

Photo #20: Eave and gutter at Unit V

Question #14 - Pictures

LAUNDRY “R BUILDING”

FOOD SERVICE “S BUILDING”

FOOD SERVICE INMATE DINING AREA (SHINGLED AREA) “S BUILDING”

FOOD SERVICE MECHANICAL ROOM (ABOVE FOOD SERVICE) “S BUILDING”

CHAPEL/ EDUCATION “Q BUILDING”

VOCATIONAL AREA “O BUILDING”

UNICOR “P BUILDING”