Multi-Ply Bituminous Waterproofing - ABBAE
Transcript of Multi-Ply Bituminous Waterproofing - ABBAE
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Copyright 2020 Allana Buick & Bers, Inc.BUR Waterproofing
Multi Ply Bituminous
Waterproofing
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Copyright 2020 Allana Buick & Bers, Inc.BUR Waterproofing
Multi Ply Bituminous
Waterproofing
▪ Historically prominent – many jobs in place
▪ Still significant portion of today’s projects,
mostly Coal Tar Pitch systems
▪ Redundancy is desired attribute
▪ Unlike BUR where felts are “shingled”,
Waterproofing felts are often “phased” or
ply-on-ply.
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Copyright 2020 Allana Buick & Bers, Inc.BUR Waterproofing
Bitumens
▪ Asphalts
▪ Usually Type I – near flux
▪ Blown asphalts are subject to deterioration from water contaminant chemicals
▪ CTP
▪ Superior water resistance
▪ Both bitumens, especially CTP, cold flow so back-nailing may be required on vertical surfaces
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Copyright 2020 Allana Buick & Bers, Inc.BUR Waterproofing
Reinforcement Felts
▪ Historically - cotton and jute saturated with asphalt or CTP
▪ Glass felts are used almost exclusively in asphalt systems
▪ CTP saturated organic felts, D227, should be used with CTP to avoid migration within membrane assembly
▪ For asphalt membranes, use polyester or glass felts, D2178
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Copyright 2020 Allana Buick & Bers, Inc.BUR Waterproofing
Waterproofing Details (BUR)
Slides courtesy of Koppers
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Copyright 2020 Allana Buick & Bers, Inc.BUR Waterproofing
Waterproofing Details (BUR)
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Copyright 2020 Allana Buick & Bers, Inc.BUR Waterproofing
Waterproofing Details (BUR)
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Copyright 2020 Allana Buick & Bers, Inc.BUR Waterproofing
Waterproofing Details (BUR)
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Copyright 2020 Allana Buick & Bers, Inc.BUR Waterproofing
Reinforcement Fabrics
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Copyright 2020 Allana Buick & Bers, Inc.BUR Waterproofing
Reinforcement Fabrics
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Copyright 2020 Allana Buick & Bers, Inc.BUR Waterproofing
Woven glass fabric embedded is hot applied
coal tar bitumen.
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Copyright 2020 Allana Buick & Bers, Inc.BUR Waterproofing
Coal Tar Waterproofing
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Copyright 2020 Allana Buick & Bers, Inc.BUR Waterproofing
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Copyright 2020 Allana Buick & Bers, Inc.BUR Waterproofing
Hydrostatic Head Polyester or Glass Fabric
Waterproofing Mastic ASTM D4586
0-5 ft. 1 Ply 8 gallons/100 sq.ft. 5-15 ft. 2 Ply 13 gallons/100 sq.ft 15-30 ft. 3 Ply 18 gallons/100 sq.ft.
Col Cold Process Waterproofing
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Copyright 2020 Allana Buick & Bers, Inc.BUR Waterproofing
Rubberized Asphalt
Waterproofing
▪ Really a single ply
▪ Predominant form is a self adhering, 56-mil
sheet laminated to 4-mil HDPE film
▪ Rolled material utilizes silicone release
paper to prevent sticking
▪ Must be pressure rolled
▪ Concrete substrate must be primed
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Copyright 2020 Allana Buick & Bers, Inc.BUR Waterproofing
Rubberized Asphalt
Waterproofing
▪ Not all self adhering modified sheets are
suitable for waterproofing
▪ Per ASTM, water absorption should be 3.2% by
weight or less
▪ Range of water absorption: 1% to 10%
▪ Internal reinforcement can be detrimental
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Copyright 2020 Allana Buick & Bers, Inc.BUR Waterproofing
Application
▪ Prime substrate, peel off release film,
position with lap joint
▪ Pressure roll membrane and seams
▪ Use liquid component at corners and at
penetrations
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Copyright 2020 Allana Buick & Bers, Inc.BUR Waterproofing
Rubberized Bitumen Sheet
Alerts
▪ Make sure the sheet is suitable for waterproofing –
absorption of moisture and wicking
▪ Assure tight bond, full adhesion
▪ Seal top edges at end of day’s work
▪ Must seal edges of sheet at angles and penetrations
using liquid waterproofing
▪ Top edge of membrane must be secured and sealed
on vertical srfaces
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Copyright 2020 Allana Buick & Bers, Inc.BUR Waterproofing
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Copyright 2020 Allana Buick & Bers, Inc.BUR Waterproofing
Multi Ply Bituminous
Waterproofing