ADDENDA #3- RFP Sylvania CC building Re-Roof Progressive Design Build for Sylvania Campus CC Building Re-Roof Services

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1 ADDENDA #3- RFP Sylvania CC building Re-Roof Progressive Design Build for Sylvania Campus CC Building Re-Roof Services Addenda Dated: 01/16/2018 PURPOSE: The purpose of this Addenda #3 is to provide a copy of the Dry Zone Facility Report, listed as Appendix K on the RFP. The document follows this cover sheet and is attached. End of Cover Sheet for Addenda #3

2 Facility Summary Client: Portland Community College Facility: College Center Facility Data Address SW 49th Avenue Address 2 - City State Portland Oregon ZIP Type of Facility Higher Education Asset Information Name Date Installed Square Footage Roof Access Entire Roof Unknown 131,817 Penthouse Facility Summary Page 243 of 883

3 Facility Summary Client: Portland Community College Facility: College Center Facility Data Address SW 49th Avenue Address 2 - City State Portland Oregon ZIP Type of Facility Higher Education Asset Information Name Date Installed Square Footage Roof Access Entire Roof Unknown 131,817 Penthouse Facility Summary Page 243 of 883

4 Facility Drawing Page 244 of 883

5 Facility Condition Map Page 245 of 883

6 Construction Details Client: Portland Community College Facility: College Center Roof Section: Entire Roof Information Year Installed Unknown Square Footage 131,817 Slope Dimension Varies Eave Height 19' Roof Access Penthouse System Type Built Up Roof (BUR) Assembly Roof # Layer Type Description Attachment R-Value Thickness 1 Deck Concrete Unknown Insulation Polyisocyanurate Unknown - 1 1/2" 1 Insulation Fiberglass Unknown - 1/2" 1 Vapor Retarder Polyethelene Unknown Insulation Fiberboard Unknown - 1/2" 1 Membrane BUR Unknown Surfacing Aluminum coating Unknown - - Details Perimeter Detail Flashing Material Drain System Coping Cap Parapet Wall, Wall Flashing, Expansion Joint Hypalon, BUR, Metal Internal Roof Drains, Gutter System, Scuppers Metal Construction Details Page 246 of 883

7 Roof Section Photo Page 247 of 883

8 Roof Section Drawing Page 248 of 883

9 Inspection Report Client: Portland Community College Facility: College Center Roof Section: Entire Roof Report Date: 05/17/2017 Inspection Information Inspection Date 05/17/2017 Core Data Yes Inspection Type Core Analysis Leakage Yes Deck Conditions Fair Flashing Conditions Perimeter Failed Wall Fair Projections Failed Counterflashing Fair Miscellaneous Details Reglets N/A Debris Yes Control Expansion Joints Poor Ponding Water Substantial Parapet Wall Fair Coping Joints Fair Perimeter Rating Condition Failed The perimeter of this system was noted as having lap deterioration, membrane tears, ponding water, unfinished details, and a number of other critical roofing problems. There was also a significant amount of wet insulation noted around the perimeter of this roof. Replacement is the only feasible option for this roof. Field Rating Condition Poor The field membrane of this system has been significantly damaged in several areas. There was crushed insulation, lap tears, failed repair attempts, and general deterioration noted throughout the entire system. Replacement is the only viable option for a long term roofing solution at this point for this facility. Page 249 of 883

10 Penetrations Rating Condition Failed The projections on this roof system have been cited as having a multitude of different problems. (see Photos section for specific details) It is because of these numerous problems that this system would not substantially benefit from repairs alone. Large scale corrective action is the only viable option at this point. Drainage Rating Condition Failed This roof system is in a very bad state. There was significant ponding water that can cause roof leaks, and in extreme cases cause weight related cave ins. This system is not in danger of caving in, but the ponding water was noted in areas that are highly susceptible to leaks. It is for this reason, along with several others that this system is being recommended for replacement. Other Rating Condition Poor The skylights on this system were significantly deteriorated at the time of inspection. Despite their functionality, it is recommended that they be considered for replacement when the roof is to avoid any further failure once the roof is replaced. Overall Rating Condition Failed This roof faces a number of different problems, and there is no easy solution to fix these issues. At this point and in this state the only viable long term option is a replacement. Due to the wet insulation and multitude of different issues, a retrofit is not the best course of action. Recommendation for this facility is a full tear off and replacement. That is the only way that long term goals can be achieved. Photo 1 There was significant deterioration around the projection details of this roof system. There is a need for considerable corrective action at this point. Page 250 of 883

11 Photo 2 There were multiple repair attempts noted on this system that are now failing. This roof system will need to be replaced for there to be any lasting effect. Photo 3 Roof system overview. Photo 4 This unit was never fully flashed into the system. This area will fail soon if the job is not finished. Photo 5 Ponding water and soft insulation was noted around this unfinished unit. Page 251 of 883

12 Photo 6 There was significant deterioration noted around the drains on this roof system as well. Photo 7 Connector roof overview. Photo 8 There were multiple repair attempts noted on this system that are now deteriorated. This roof system will need to be replaced for there to be any lasting effect. Photo 9 This area has been repaired and reflashed multiple times. Units have been added and removed a number of times as well. This area is failing and will not be effectively fixed until the roof is replaced. Page 252 of 883

13 Photo 10 Significant ponding was noted in this area as well. Photo 11 This photo shows an area where a unit has been taken out and is now deteriorating. Photo 12 Skylight panel detail overview. Photo 13 Minor residue buildup was noted on the skylights. Page 253 of 883

14 Photo 14 This photo shows a significantly stopped up internal roof drain. Photo 15 Many of the drains on this roof have been repaired, but they were raised in the process. They are now higher than the roof system and the roof ponds water in many areas. Photo 16 Delamination was noted on many of the flashings of this system. Photo 17 There were multiple repair attempts noted on this system that are now failing. This roof system will need to be replaced for there to be any lasting effect. Page 254 of 883

15 Photo 18 There were multiple repair attempts noted on this system that are now failing. This roof system will need to be replaced for there to be any lasting effect. Photo 19 More delamination was noted on this flashing detail. Photo 20 This photo shows expansion joint caulking deterioration. Photo 21 This photo shows significant blistering on this roof system. Page 255 of 883

16 Photo 22 Ponding: Ponding water occurs when moisture collects in large pools on the surface of a roof system. These pools begin to form because of two reasons: 1) roof drains are blocked or clogged with debris, 2) the insulation package has lost dimensional stability and has reduced in thickness, 3) poor slope to drain design via overbuilt crickets or tapered insulation system, 4) roof drains are built along side building support columns which maintain a consistent height under load while the balance of the roof system is applied over a live deck which tends to move and deflect under normal seasonal load. In all cases, roof depressions that collect and hold water will tend to grow in size as the added weight of the ponding water will continue to deflect the roof deck even further. This condition can damage the roof in a number of ways. Additional structural loads create more movement of the roof assembly creating more tear stress and of course a potential for structural failure. UV intensity also increases under ponding conditions as the sun s rays are increased to the point where it accelerates deterioration in most all roof systems. In asphalt based assemblies the natural waterproofing oils in the asphalt will separate from the membrane if the system remains submerged under water for sustained periods. Single ply roof system rot and burn out when the ponding area is exposed to sunlight. The added weight can crush insulation increasing the ponding condition and creating a condition where the insulation becomes a useless thermal barrier. This condition then affects the mechanical system and the cost of heating and cooling the building. In the winter ponding water will expand as it freezes. This expansion will weaken small imperfections in the roof system. Small cracks and tears will widen until they rupture to allow water into the building. And finally, a negatively deflected deck becomes a structural concern. Photo 23 There were multiple repair attempts noted on this system that are now heavily deteriorated. This roof system will need to be replaced for there to be any lasting effect. Page 256 of 883

17 Photo 24 This metal paneling was in good working condition at the time of inspection. No corrective action needed at this time. Photo 25 Metal paneling overview. Photo 26 The gutters were functional on this roof system at the time of inspection. Photo 27 Lap deterioration was noted around the perimeter of this roof system. Page 257 of 883

18 Photo 28 The trees surrounding this building have grown too close to the facility, and now need to cut back to avoid leaving further debris on this system. Photo 29 This photo shows the core sample that was taken on this roof system. Photo 30 The moisture gauge is being used here to show the extreme amount of moisture that has entered this roof assembly. Page 258 of 883

19 Photo 31 The moisture gauge is being used here to show the extreme amount of moisture that has entered this roof assembly. Photo 32 Roof section overview. Photo 33 Roof section overview. Page 259 of 883

20 Photo 34 Facility detail overview. Photo 35 Skylight detail overview. Photo 36 This photo shows extreme ponding on this roof section. Photo 37 More ponding water on this system. Page 260 of 883

21 Photo 38 More ponding water on this system. Photo 39 This photo shows an unfinished flashing detail on this roof. Photo 40 More ponding water on this system. Photo 41 Roof system overview. Page 261 of 883

22 Photo 42 Debris General: Roof top debris is typically left on the roof by trades working on units or penetrations. This debris is a tremendous hazard as it could at any time blow off the roof possibly causing bodily harm or damaging material goods. Photo 43 The skylights on this system were significantly deteriorated and should be considered for replacement when the roof is. Photo 44 More perimeter deterioration and ponding residue was noted in this photo. Photo 45 This penthouse has been replaced, but the drainage is significantly stopped up on this section. This issue can cause premature system failure if not corrected. Page 262 of 883

23 Photo 46 Repairs have been attempted on the drainage system on this penthouse. Recommend that this area be scanned to access the assembly for moisture infiltration. Photo 47 Penthouse detail overview. Photo 48 Penthouse perimeter detail overview. Page 263 of 883

24 Solution Options Client: Portland Community College Facility: College Center Roof Section: Entire Roof Replace Options Solution Option: Replace Action Year: 2017 Square Footage: 131,817 Expected Life (Years): 30 Budget: $3,000, This roof system needs significant corrective action, and replacement is the most viable solution. The following information is not a complete scope of work, but sets a general price range and detail options for this system. Once approved, a full Specification will be needed for this roof system. The pricing and details shown here are subject to change once a prebid walkthrough is conducted. Concrete Deck Cold Process 20 yr NDL Manufactures Warranty Remove existing metal counter flashing and roofing down to existing concrete deck and dispose to authorized dumpsite. Check existing concrete deck for damage and report to the manufacturer s representative. Remove the old vapor retarder and install a cold process vapor retarder. Install 1/4" tapered polyisocyanurate insulation in low rise insulation adhesive. Install 1/2" Densdeck cover board in low rise insulation adhesive. Install modified bitumen membrane base sheet to the field of the roof in pourable cold process adhesive. Install modified bitumen membrane base sheet to all flashing's in flashing grade flashing adhesive. Install modified bitumen membrane fire rated mineral cap sheet to the field of the roof in pourable cold process adhesive. Install modified bitumen membrane fire rated cap sheet to all flashing's in flashing grade flashing adhesive. Care should be taken to eliminate air entrapment under the membrane, use a weighted roller to ensure full and even contact of both membranes. Install Kynar finish 24 gauge metal wall counter flashing's with structural sealant joints. Install Kynar finish 24 gauge metal coping cap at roof control joint. Remove existing failing sealant in concrete coping joints, point and tuck joints with structural sealant. Install 4 lb lead flashing's at plumbing pipe penetrations. Install 4 lb lead sheet flashing at roof drains prior to modified bitumen flashing installation. Install new cant strip at parapet and control walls. Broadcast standard roofing minerals at the side and end seams where there is any cold process bleed out. At all vertical flashing seams, apply a three course of flashing cement/mesh/flashing cement. Coat with aluminizer after 30 days. At job completion, lightly blow the finished roof to collect any loose minerals. Clean entire project of debris and remove all equipment. Solution: Jun 5, 2017 Page 264 of 883

25 Solution: Jun 5, 2017 Page 265 of 883

26 Facility Summary Client: Portland Community College Facility: College Services Building Facility Data Address SW 49th Ave Address 2 - City State Portland Oregon ZIP Type of Facility Higher Education Asset Information Name Date Installed Square Footage Roof Access Built Up Roof ,964 Internal Roof Hatch Facility Summary Page 266 of 883

27 Facility Drawing Page 267 of 883

28 Facility Condition Map Page 268 of 883

29 Construction Details Client: Portland Community College Facility: College Services Building Roof Section: Built Up Roof Information Year Installed 2006 Square Footage 10,964 Slope Dimension 1/2" : 12" Eave Height 20' Roof Access Internal Roof Hatch System Type Built Up Roof (BUR) Assembly Roof # Layer Type Description Attachment R-Value Thickness 1 Deck Metal Deck Mechanically attached Insulation Polyisocyanurate Unknown - 4" 1 Insulation Fiberboard Unknown - 1/2" 1 Membrane BUR Unknown Surfacing Aluminum coating Unknown - - Details Perimeter Detail Flashing Material Drain System Coping Cap Parapet Wall, Wall Flashing Modified Membrane, Metal Internal Roof Drains, Scuppers Metal Construction Details Page 269 of 883

30 Roof Section Photo Page 270 of 883

31 Roof Section Drawing Page 271 of 883

32 Inspection Report Client: Portland Community College Facility: College Services Building Roof Section: Built Up Roof Report Date: 05/17/2017 Inspection Information Inspection Date 05/17/2017 Core Data Yes Inspection Type Core Analysis Leakage No Deck Conditions Good Flashing Conditions Perimeter Good Wall Good Projections Good Counterflashing Good Miscellaneous Details Reglets N/A Debris No Control Expansion Joints N/A Ponding Water None Parapet Wall Good Coping Joints Good Perimeter Rating Condition Good The perimeter of this roof system was fully functional at the time of inspection. There were some loose fasteners noted around the coping detail that need to be resecured, but overall the perimeter of this system was in good condition. Field Rating Condition Good The field of this roof system had two small areas where lap deterioration was noted and repaired. The repairs were temporary, and should be checked frequently for functionality. The rest of the field was fully functional at the time of inspection. Page 272 of 883

33 Penetrations Rating Condition Good The penetrations on this roof system were fully functional at the time of inspection. No corrective measures are needed or recommended at this time. Drainage Rating Condition Good The internal roof drains on this system were fully functional at the time of inspection. There was minor debris buildup that was removed during the inspection. Recommend that the roof be regularly checked for debris buildup and cleaned when necessary. Other Rating Condition Fair The skylights on this roof system will be a regular maintenance item. Light residue buildup was noted during the inspection, and should be monitored regularly. Overall Rating Condition Good This roof system was fully functional, and there were no notable problems found during the inspection. With proper maintenance and regular inspections, this system will likely exceed its life expectancy. Recommendation is to continue regular inspections. Photo 1 Roof system overview. Page 273 of 883

34 Photo 2 Perimeter detail overview. Photo 3 Drainage detail overview. Photo 4 The perimeter of this roof system was in good working condition at the time of inspection. Photo 5 This photo shows the skylight detail used on this facility. Page 274 of 883

35 Photo 6 Residue and moisture related buildup was noted on the skylight detail. These types of panels will be a regular maintenance item, and should be inspected/cleaned regularly. Photo 7 This condition is commonly referred to as "Alligatoring." When the roof asphalt is put down too thick it collects and cracks. This issue needs to be monitored and is functional as long as the roof felts are not visible in the cracks. Monitor this issue closely. Photo 8 Minor residue buildup was noted and cleaned around the drains on this roof system. Photo 9 Blisters: Soft spongy pockets or swellings in the roofing material. They occur between layers of felt or between the roof membrane and substrate. Air or moisture vapor entrapped within a blister expands as the roof and outside air temperatures rise. This results in sufficient pressure to push the roofing felts upwards and apart. Blisters may be ruptured by roof traffic, expanding frozen water, or hail (especially during colder weather). Some blisters may become so large as to affect drainage, which may then cause ponding water. Laps could also be pulled apart, resulting in leakage. A ruptured blister will immediately allow water to penetrate and damage the roof system. Page 275 of 883

36 Photo 10 Flashing detail overview. These blocks are fine on the roof as long as they remain in this pad, and not directly on the membrane. Photo 11 This photo shows an open lap that was noted on this roof system. This was an isolated occurrence, and was repaired during the inspection. Photo 12 This photo shows minor fastener back out on the coping cap detail. Recommend that the loose fasteners be resecured on this roof system. Photo 13 This photo shows the only other open detail that was noted and repaired on this roof system. Page 276 of 883

37 Photo 14 The damaged areas were repaired with a temporary solution during the inspection. Recommend that this area be reevaluated during the next inspection. Photo 15 This photo shows the core information on this roof system. Photo 16 This photo shows the other repair made during this roof inspection. Recommend that this area be reassessed during the next inspection. Page 277 of 883

38 Solution Options Client: Portland Community College Facility: College Services Building Roof Section: Built Up Roof Inspection Options Solution Option: Inspection Action Year: 2018 Square Footage: 10,964 Expected Life (Years): 15 Budget: - Solution: Jun 5, 2017 Page 278 of 883