際際滷

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Cold Process Restoration of Built-up
                            Built-up
         Roof on Church

                         completed in 2009
Satellite view of built-up asphalt roof with gravel surfacing.
Satellite view of built-up asphalt roof with gravel surfacing.
Dry and Wet Vacuuming of existing gravel.
Dry and Wet Vacuuming of existing gravel.
Flashings prior to being replaced
Flashings prior to being replaced


             Perimeter Flashing Deterioration: Expansion and contraction
             movement of the roof causes stress in the perimeter flashing
             causing it to tear. Moisture can then enter the roofing system
             and building. Moisture entry will cause damage to the
             insulation and reduce its insulating properties. It will also allow
             water to enter the building causing internal damage.
All deficiencies were identified and repaired prior to
 the new flood and gravel installation
Ridges: these show up on the surface of built up roofs as linear buckling felt lines protruding upward through the surface layers of
asphalt and aggregate. Ridges are formed by either thermal changes expanding and contracting the roofing felts or by gaps in the
underlying insulation that allow vapour to migrate upwards through the roof system. Over a period of time ridges will grow and
erode until they are stripped of their protective asphalt. These exposed ridges, through repeated weather cycling, will eventually
crack and split to allow water into the roof system.

 Splits: membrane splits are usually caused by building movement, ridges, and expansion and contraction. Such movement can be
caused by lack of attachment of one or more of the component parts of the roof system, or where the building itself generates
movement. Weak or inflexible membranes reach a point where they cannot accommodate further movement. At this time the roof
splits open. The open split allows water to enter the roofing system, saturating the insulation, and causes leaks into the building. If
allowed to persist, the area of damage will expand.




                                                        All ridges
                                                        repaired prior
                                                        to restoration
Blister Repair
   Blister Repair
                Spud all gravel back twelve (12) inches around the blister, clean and prime the area.
                All blisters must be cut and opened down to the solidly adhered plies of the existing
                 roof system. Use a roofer's knife to open the blister with an "X" or "H" cut. Fold the
                 flaps and remove any existing moisture. Permit the area to dry before applying repair
                 materials.
                Apply a liberal coating of bituminous material into the blister. Firmly press the flaps
                 into the bituminous material and trim the edges to ensure proper fit.
                Apply a coating of bituminous material over the repaired area extending a minimum
                 of eight (8) inches beyond the cuts. Embed a strip of fabric into the bituminous
                 material and brush or roll firmly. Apply a second coat of bituminous material over the
                 fabric and onto the roof surface.
Cold Applied Restoration
                           Cold Applied Restoration

Cold applied no odor rubberized restoration treatment installed to add waterproofing strength
Cold applied no odor rubberized restoration treatment installed to add waterproofing strength
    to the field of the roof.
    to the field of the roof.


                                            V.O.C. Compliant
                                            - Environmentally Friendly
                                            - Low odor
                                            - Applied by spray, brush, or squeegee
                                            - Resists degradation due to UV exposure
                                            - Low solvent released into atmosphere
                                            - Provides a superior surfacing for all cold process restorations
Embed pea gravel to cover all resaturant. No resaturant is to be visible
Embed pea gravel to cover all resaturant. No resaturant is to be visible
     throughout. Uniformly embed aggregate in the flood coat of cold
     throughout. Uniformly embed aggregate in the flood coat of cold
         adhesive at a rate of five hundred (500) lbs. per square.
         adhesive at a rate of five hundred (500) lbs. per square.
Gravel being installed to protect the roof from ultraviolet rays.
Gravel being installed to protect the roof from ultraviolet rays.
Cold process restoration
Flashings are replaced due to the extreme pressure that exists
Flashings are replaced due to the extreme pressure that exists
from expansion and contraction of building.
from expansion and contraction of building.



Base Flashing Ply:
Base Flashing Ply:
      
            Base Flashing Ply: 40 mil SBS modified
             Base Flashing Ply: 40 mil SBS modified
             membrane with woven fiberglass scrim
             membrane with woven fiberglass scrim
             reinforcement with the following minimum
             reinforcement with the following minimum
             performance requirements according to ASTM
             performance requirements according to ASTM
             D5147. Properties (Finished Membrane):
             D5147. Properties (Finished Membrane):


Modified Flashing Ply:
Modified Flashing Ply:
Modified Membrane Properties (Finished Membranes):
Modified Membrane Properties (Finished Membranes):
        STRESSPLY "E"; ASTM D6162, Type III Grade S
        STRESSPLY "E"; ASTM D6162, Type III Grade S
      Tensile Strength (ASTM D5147)
      Tensile Strength (ASTM D5147)
            ≒      2 in/min. @ 73.4 賊 3.6属F MD 500 lbf/in CMD
                                           F
                     2 in/min. @ 73.4 賊 3.6属 MD 500 lbf/in CMD
                    550 lbf/in
                     550 lbf/in
            ≒      50 mm/min. @ 23 賊 3属C MD 87.5 kN/m
                                           C
                     50 mm/min. @ 23 賊 3属 MD 87.5 kN/m
                    CMD96.2 kN/m
                     CMD96.2 kN/m
      
             Tear Strength (ASTM D5147)
               Tear Strength (ASTM D5147)
            ≒      2 in/min. @ 73.4 賊 3.6属F MD 900 lbf CMD 950
                                           F
                     2 in/min. @ 73.4 賊 3.6属 MD 900 lbf CMD 950
                    lbf
                     lbf
            ≒      50 mm/min. @ 23 賊 3属C MD 4003 N CMD 4226
                                           C
                     50 mm/min. @ 23 賊 3属 MD 4003 N CMD 4226
                    NN
      
             Elongation at Maximum Tensile (ASTM D5147)
               Elongation at Maximum Tensile (ASTM D5147)
            ≒      2 in/min. @ 73.4 賊 3.6属F MD 6.0% CMD 6.0%
                                           F
                     2 in/min. @ 73.4 賊 3.6属 MD 6.0% CMD 6.0%
            ≒      50 mm/min. @ 23 賊 3属C MD 6.0% CMD 6.0%
                                           C
                     50 mm/min. @ 23 賊 3属 MD 6.0% CMD 6.0%
      
             Low Temperature Flexibility (ASTM D5147):
               Low Temperature Flexibility (ASTM D5147):
              Passes -30属F (-34属C)
                           F
               Passes -30属 (-34属 C)
Aluminize any exposed roof and projections. This prevents
Aluminize any exposed roof and projections. This prevents
elements like UV from deteriorating any penetrations which may
elements like UV from deteriorating any penetrations which may
lead to early roof failure.
lead to early roof failure.
New metal counter flashing installed to protect
New metal counter flashing installed to protect
waterproofing membrane.
waterproofing membrane.
Lower level roof
                      Lower level roof
After four years the roof has zero signs of problems and the
After four years the roof has zero signs of problems and the
restoration is expected to add 20 years to the existing roof.
restoration is expected to add 20 years to the existing roof.
Upper level roof
                                            Upper level roof

FINAL INSPECTION
 FINAL INSPECTION
≒   At completion of roofing installation and associated work, meet with Contractor, roofing system
      At completion of roofing installation and associated work, meet with Contractor, roofing system
     manufacturer's representative, and other representatives directly concerned with performance of roofing
      manufacturer's representative, and other representatives directly concerned with performance of roofing
     system.
      system.
≒   Walk roof surface areas of the building, inspect perimeter building edges as well as flashing of roof
      Walk roof surface areas of the building, inspect perimeter building edges as well as flashing of roof
     penetrations, walls, curbs and other equipment. List all items requiring correction or completion and furnish
      penetrations, walls, curbs and other equipment. List all items requiring correction or completion and furnish
     copy of list to each party in attendance.
      copy of list to each party in attendance.
≒   The roofing system manufacturer reserves the right to request a thermographic scan of the roof during
      The roofing system manufacturer reserves the right to request a thermographic scan of the roof during
     final inspection to determine if any damp or wet materials have been installed. The thermographic scan
      final inspection to determine if any damp or wet materials have been installed. The thermographic scan
     shall be provided by the Contractor.
      shall be provided by the Contractor.
≒   If core cuts verify the presence of damp or wet materials, the Contractor shall be required to replace the
      If core cuts verify the presence of damp or wet materials, the Contractor shall be required to replace the
     damaged areas at his own expense.
      damaged areas at his own expense.
≒   Repair or replace deteriorated or defective work found at time above inspection as required to a produce
      Repair or replace deteriorated or defective work found at time above inspection as required to a produce
     an installation which is free of damage and deterioration at time of Substantial Completion and according
      an installation which is free of damage and deterioration at time of Substantial Completion and according
     to warranty requirements.
      to warranty requirements.
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Cold process restoration

  • 1. Cold Process Restoration of Built-up Built-up Roof on Church completed in 2009
  • 2. Satellite view of built-up asphalt roof with gravel surfacing. Satellite view of built-up asphalt roof with gravel surfacing.
  • 3. Dry and Wet Vacuuming of existing gravel. Dry and Wet Vacuuming of existing gravel.
  • 4. Flashings prior to being replaced Flashings prior to being replaced Perimeter Flashing Deterioration: Expansion and contraction movement of the roof causes stress in the perimeter flashing causing it to tear. Moisture can then enter the roofing system and building. Moisture entry will cause damage to the insulation and reduce its insulating properties. It will also allow water to enter the building causing internal damage.
  • 5. All deficiencies were identified and repaired prior to the new flood and gravel installation Ridges: these show up on the surface of built up roofs as linear buckling felt lines protruding upward through the surface layers of asphalt and aggregate. Ridges are formed by either thermal changes expanding and contracting the roofing felts or by gaps in the underlying insulation that allow vapour to migrate upwards through the roof system. Over a period of time ridges will grow and erode until they are stripped of their protective asphalt. These exposed ridges, through repeated weather cycling, will eventually crack and split to allow water into the roof system. Splits: membrane splits are usually caused by building movement, ridges, and expansion and contraction. Such movement can be caused by lack of attachment of one or more of the component parts of the roof system, or where the building itself generates movement. Weak or inflexible membranes reach a point where they cannot accommodate further movement. At this time the roof splits open. The open split allows water to enter the roofing system, saturating the insulation, and causes leaks into the building. If allowed to persist, the area of damage will expand. All ridges repaired prior to restoration
  • 6. Blister Repair Blister Repair Spud all gravel back twelve (12) inches around the blister, clean and prime the area. All blisters must be cut and opened down to the solidly adhered plies of the existing roof system. Use a roofer's knife to open the blister with an "X" or "H" cut. Fold the flaps and remove any existing moisture. Permit the area to dry before applying repair materials. Apply a liberal coating of bituminous material into the blister. Firmly press the flaps into the bituminous material and trim the edges to ensure proper fit. Apply a coating of bituminous material over the repaired area extending a minimum of eight (8) inches beyond the cuts. Embed a strip of fabric into the bituminous material and brush or roll firmly. Apply a second coat of bituminous material over the fabric and onto the roof surface.
  • 7. Cold Applied Restoration Cold Applied Restoration Cold applied no odor rubberized restoration treatment installed to add waterproofing strength Cold applied no odor rubberized restoration treatment installed to add waterproofing strength to the field of the roof. to the field of the roof. V.O.C. Compliant - Environmentally Friendly - Low odor - Applied by spray, brush, or squeegee - Resists degradation due to UV exposure - Low solvent released into atmosphere - Provides a superior surfacing for all cold process restorations
  • 8. Embed pea gravel to cover all resaturant. No resaturant is to be visible Embed pea gravel to cover all resaturant. No resaturant is to be visible throughout. Uniformly embed aggregate in the flood coat of cold throughout. Uniformly embed aggregate in the flood coat of cold adhesive at a rate of five hundred (500) lbs. per square. adhesive at a rate of five hundred (500) lbs. per square.
  • 9. Gravel being installed to protect the roof from ultraviolet rays. Gravel being installed to protect the roof from ultraviolet rays.
  • 11. Flashings are replaced due to the extreme pressure that exists Flashings are replaced due to the extreme pressure that exists from expansion and contraction of building. from expansion and contraction of building. Base Flashing Ply: Base Flashing Ply: Base Flashing Ply: 40 mil SBS modified Base Flashing Ply: 40 mil SBS modified membrane with woven fiberglass scrim membrane with woven fiberglass scrim reinforcement with the following minimum reinforcement with the following minimum performance requirements according to ASTM performance requirements according to ASTM D5147. Properties (Finished Membrane): D5147. Properties (Finished Membrane): Modified Flashing Ply: Modified Flashing Ply: Modified Membrane Properties (Finished Membranes): Modified Membrane Properties (Finished Membranes): STRESSPLY "E"; ASTM D6162, Type III Grade S STRESSPLY "E"; ASTM D6162, Type III Grade S Tensile Strength (ASTM D5147) Tensile Strength (ASTM D5147) ≒ 2 in/min. @ 73.4 賊 3.6属F MD 500 lbf/in CMD F 2 in/min. @ 73.4 賊 3.6属 MD 500 lbf/in CMD 550 lbf/in 550 lbf/in ≒ 50 mm/min. @ 23 賊 3属C MD 87.5 kN/m C 50 mm/min. @ 23 賊 3属 MD 87.5 kN/m CMD96.2 kN/m CMD96.2 kN/m Tear Strength (ASTM D5147) Tear Strength (ASTM D5147) ≒ 2 in/min. @ 73.4 賊 3.6属F MD 900 lbf CMD 950 F 2 in/min. @ 73.4 賊 3.6属 MD 900 lbf CMD 950 lbf lbf ≒ 50 mm/min. @ 23 賊 3属C MD 4003 N CMD 4226 C 50 mm/min. @ 23 賊 3属 MD 4003 N CMD 4226 NN Elongation at Maximum Tensile (ASTM D5147) Elongation at Maximum Tensile (ASTM D5147) ≒ 2 in/min. @ 73.4 賊 3.6属F MD 6.0% CMD 6.0% F 2 in/min. @ 73.4 賊 3.6属 MD 6.0% CMD 6.0% ≒ 50 mm/min. @ 23 賊 3属C MD 6.0% CMD 6.0% C 50 mm/min. @ 23 賊 3属 MD 6.0% CMD 6.0% Low Temperature Flexibility (ASTM D5147): Low Temperature Flexibility (ASTM D5147): Passes -30属F (-34属C) F Passes -30属 (-34属 C)
  • 12. Aluminize any exposed roof and projections. This prevents Aluminize any exposed roof and projections. This prevents elements like UV from deteriorating any penetrations which may elements like UV from deteriorating any penetrations which may lead to early roof failure. lead to early roof failure.
  • 13. New metal counter flashing installed to protect New metal counter flashing installed to protect waterproofing membrane. waterproofing membrane.
  • 14. Lower level roof Lower level roof After four years the roof has zero signs of problems and the After four years the roof has zero signs of problems and the restoration is expected to add 20 years to the existing roof. restoration is expected to add 20 years to the existing roof.
  • 15. Upper level roof Upper level roof FINAL INSPECTION FINAL INSPECTION ≒ At completion of roofing installation and associated work, meet with Contractor, roofing system At completion of roofing installation and associated work, meet with Contractor, roofing system manufacturer's representative, and other representatives directly concerned with performance of roofing manufacturer's representative, and other representatives directly concerned with performance of roofing system. system. ≒ Walk roof surface areas of the building, inspect perimeter building edges as well as flashing of roof Walk roof surface areas of the building, inspect perimeter building edges as well as flashing of roof penetrations, walls, curbs and other equipment. List all items requiring correction or completion and furnish penetrations, walls, curbs and other equipment. List all items requiring correction or completion and furnish copy of list to each party in attendance. copy of list to each party in attendance. ≒ The roofing system manufacturer reserves the right to request a thermographic scan of the roof during The roofing system manufacturer reserves the right to request a thermographic scan of the roof during final inspection to determine if any damp or wet materials have been installed. The thermographic scan final inspection to determine if any damp or wet materials have been installed. The thermographic scan shall be provided by the Contractor. shall be provided by the Contractor. ≒ If core cuts verify the presence of damp or wet materials, the Contractor shall be required to replace the If core cuts verify the presence of damp or wet materials, the Contractor shall be required to replace the damaged areas at his own expense. damaged areas at his own expense. ≒ Repair or replace deteriorated or defective work found at time above inspection as required to a produce Repair or replace deteriorated or defective work found at time above inspection as required to a produce an installation which is free of damage and deterioration at time of Substantial Completion and according an installation which is free of damage and deterioration at time of Substantial Completion and according to warranty requirements. to warranty requirements.