section c below slab-on-grade

Dual Seal® Membrane Waterproofing Installation Manual

An Company

Section CBELOW SLAB-ON-GRADE

RPM/Belgium N.V.H. Dunantstraat 11B • B-8700 Tielt

Tel.: +32 (0) 51 / 40 38 01 • Fax: +32 (0) 51 / 40 55 90E-mail: [email protected] • www.rpm-belgium.be

2

WHAT ARE THE DUAL SEAL® AND DUAL SEAL® LG MEMBRANES?

Dual Seal® membranes are two-component membranes manufactured by Paramount Technical Products, Inc. a subsidiaryof RPM International Inc., and exclusively distributed in Europe by RPM/Belgium N.V.. The membranes combine thecharacteristics of the two most effective waterproofing materials available today; high density polyethylene (HDPE) andWyoming Sodium Bentonite clay (approximately 5 kg/m2). These two materials act in concert to produce a self-sealing,self-protecting waterproofing membrane which, when subject to the necessary containment pressure, seals tightly to itselfand any surface it comes in contact with when in the presence of water. The Dual Seal® LG Membrane is the Dual Seal®

Membrane with a protective layer of spun polypropylene imbedded in the bentonite component. This polypropyleneprotects the bentonite during installation while allowing the bentonite to seal against the substrate. Dual Seal® LGMembranes are specifically designed for use in blindside installations such as lagging walls, under floors, and elevatorpits, etc...

Figure 1: Dual Seal® Membrane and Dual Seal® LG Membrane

Wyoming SodiumBentonite

GENERAL INSTALLATION NOTES

Preparation

1. The Dual Seal® and Dual Seal® LG Membranes can beinstalled in conjunction with any of the four most typicalslab-on-grade systems with equal performance (seefigures 2 through 5). The slab-on-grade systemselected and itʼs corresponding Dual Seal® Membraneinstallation is based on such factors as: waterhead,grade condiction, climate, traffic by other trades, etc.

2. The grade should be prepared either by compactingoriginal earth, compacting a granular base, or byinstalling a mud slab / concrete blinding layer ofthickness 75 mm.

3. Bentonite facing up is the preferred installation method.However, if, for reasons of protection, the bentonite sideis face down, 1200 g Polyethylene sheet must first beinstalled on top of the earth or base.

4. When the bentonite side of Dual Seal® Membrane isfacing up, it is recommended to use the Dual Seal® LGMembrane.

5. Overlapped Dual Seal® Membrane installations belowfloor slab shall be a minimum of 75 mm at overlaps.

6. All overlaps shall be stapled every 200 mm when thebentonite side is face up, and taped with 100 mm wideDual Seal® Temporary tape when the bentonite side isface down.

7. Waterproof around all pipe penetrations (details 12-15,also see section K “penetrations”).

8. Prepare all expansion joints (details 10 and 11).

9. Prepare tie-in to existing floor and below floorwaterproofing.

10. Terminate around floor perimeter (details 8 and 9).

11. When the bentonite side is facing up, protect the DualSeal® Membrane from damage caused by reinforcingchairs.

12. Repair any damaged Dual Seal® Membrane prior toconcrete placement, after steel reinforcement is tied inplace.

13. Covering material over Dual Seal® Membranes mustweigh at least 140 kg/m2 to provide the necessarycontainment pressure. In practice this means aminimum thickness of a concrete slab of 75 mm and aminimum thickness of soil of 150 mm.

14. Concrete placement should not be dropped over 600mm directly onto a Dual Seal® Membrane. Best is toflow in place.

15. Install Superstop® at all construction joints.

High Density Polyethylene (HDPE)

Wyoming SodiumBentonite

High DensityPolyethylene (HDPE)

Spun polyproplene protection screed

Dual Seal® Membrane Dual Seal® LG Membrane

3

Figure 2: Simple slab-system A (also see fig. 6)

Finished floor slab. Minimum thickness 75 mm togive required containment pressure. Light to mod-erate reinforcement.

Dual Seal® LG Membrane (HDPE side down).Staple overlaps every 200 mm

Compacted Granular Base.20 mm or smaller

SLAB-ON-GRADE FLOOR SYSTEMS

Figure 3: Mat slab - system B (also see fig. 7)

Figure 4: Mat slab with protection slab - system C (also see fig. 8)

Figure 5: Mat slab with mud slab / blinding concrete layer - system D (also see fig. 9)

Anticipatedconditions:

The Dual Seal® LGMembrane is not leftexposed for pro-longed periods.

Light traffic asexpected on DualSeal® Membranebefore casting offinished floor slab.

Mat slab (heavily reinforced)

1200 g Polyethylene base sheet

Dual Seal® Membrane (HDPE side up). 100 mmwide Dual Seal® Temporary tape at overlaps



Dual Seal®

Membrane leftexposed for pro-longed periods.

Moderate trafficexpected on DualSeal® Membranebefore casting of themat slab.


Dual Seal® Membrane (HDPE side up). 100 mmwide Dual Seal® Temporary tape at overlaps

Unexcavated earth

Mud slab / concrete blinding layer of 75 mmthickness


Dual Seal®

Membrane leftexposed for pro-longed periods.

Moderate trafficexpected on DualSeal® Membranebefore casting ofmat slab.



Protection slab (not reinforced)

Dual Seal® Membrane (HDPE side up). 100 mmwide Dual Seal® Temporary Tape overlaps.



Heavy traffic expect-ed on Dual Seal®

Membrane beforecasting of mat slab.

4


Figure 7: Mat slab - system B (also see fig. 3)

Figure 6: Simple slab - system A (also see fig. 2)

Finish floor slab. Minimum thickness75 mm to give required containmentpressure. Light to moderate rein-forcement.

Superstop® at construction joint

Dual Seal® LG Membrane (HDPEside down.) Staple 75 mm overlapsevery 200 mm.

Compacted Granular Base20 mm or smaller




Dual Seal® Membrane (HDPE sideup.) 100 mm wide Dual Seal®

Temporary tape at 75 mm overlaps.


5


Figure 9: Mat slab with mud slab / blinding concrete layer - system D (also see fig. 5)

Figure 8: Mat slab with protection slab - system C (also see fig. 4)



Protection slab (not reinforced)


Dual Seal® Membrane (HDPE side up.) 100mm Dual Seal® Temporary Tape at 75 mmoverlaps.




Dual Seal® Membrane (HDPE side up.) 100mm Dual Seal® Temporary Tape at 75 mmoverlaps.

Unexcavated earth

Mud slab / concrete blinding layer of 75 mmthickness

6

DETAILS

Detail 1: Tie-in between backfilled wall/footing and floor slab

Detail 2: Tie-in between backfilled wall/footing and mat slab and protection slab

Detail 3: Tie-in between backfilled wall and mat slab and protection slab

Nail Dual Seal® LG Membrane every 450 mm

Dual Seal® LG Membrane (HDPE side down)

25 mm Dual Seal® Mastic Fillet

Compacted Granular Base


Superstop® installed 50 mm in from outer face of wall

300 mm Dual Seal® LG Membrane corner strip.(Staple edges every 75 mm)

Dual Seal® LG Membrane (bentonite facing installer)(Placed to the interior of footing formwork)


Superstop® installed a minimum of 50 mm in fromouter face of wall

Protection slab

Dual Seal® Membrane (HDPE side up.) Staple termi-nation every 75 mm) (see figures 4 and 8)

Dual Seal® LG Membrane (bentonite facing installer)Placed to the interior of mat slab formwork



Superstop® installed a minimum of 50 mm in fromouter face of wall


Protection slab

Dual Seal® Membrane (HDPE side up.) Nail to footingevery 200 mm. (see figures 4 and 8)

Polyethylene base sheet


Dual Seal® LG Membrane (see detail 1)

Dual Seal® LG Membrane (see detail 1)

7

DETAILS

Detail 4: Tie-in between backfilled wall and mat slab and mud slab / blinding concrete layer

Detail 5: Tie-in between blindside wall/footing and floor

Detail 3: Tie-in between blindside wall and mat slab and protection slab




Dual Seal® LG Membrane (bentonite facing installer)Placed to the interior of mat slab formwork

Dual Seal® Membrane (HDPE side up) (see figures 5 and 9)

Mud slab / Concrete blinding layer

Unexcavated earth


Dual Seal® LG Membrane (Bentonite facing installer.All overlaps shall be 75 mm with nails every 600 mmand staples every 75 mm)

Dual Seal® Membrane (HDPE side up.)Staple termination every 75 mm.(see figures 4 and 8)



Nail Dual Seal® LG Membrane every 200 mm


Dual Seal® LG Membrane (HDPE side down) (see figures 2 and 6)

Dual Seal® LG Membrane (bentonite against con-crete) Placed to the interior of footing formwork


Protection slab


300 mm Dual Seal® LG Membrane corner strip.(Bentonite against concrete.) Staple edges every 75 mm.

8

Finish floor slab

Wall

Footing

Nail Dual Seal® LGMembrane every 150mm over Superstop®

Dual Seal® LG Membrane(HDPE side down)

25 mm Dual Seal® MasticFillet

Finish floor slab

Backer rod andsealant

Footing

Dual Seal® Termina-tion bar nailed every200 mm over DualSeal® Membrane andSuperstop®

Dual Seal® LGMembrane (HDPEside down)

25 mm Dual Seal®

Mastic Fillet

Detail 7: Tie-in between blindside wall and below floor waterproofing

Detail 8: Termination at floor to interior wall face - HDPE side down

Detail 9: Termination at floor to interior wall face - HDPE side up

DETAILS

Superstop® installed 50 mm from outer face of wall

Mud slab / concrete blinding layer

Dual Seal® LG Membrane (bentonite facing installer) (see section B)

Dual Seal® (HDPE side up. Staple termination every75 mm) (see figures 5 and 9)

Finish floor slab

Wall

Footing

Nail Dual Seal® Membraneevery 200 mm and tapewith Dual Seal®

Permanent Seam Tape

Dual Seal® Membrane(HDPE side up)

25 mm Dual Seal® MasticFillet

Finish floor slab

Backer rod andsealant

Footing

Dual Seal®

Termination barnailed every 200mmDual Seal®

Membrane(HDPE side up)

25 mm Dual Seal®

Mastic Fillet

9

Detail 10: Floor to wall expansion joint

Detail 11: Mid floor expansion joint

Detail 12: Through floor penetration (cast-in-place)

DETAILS

Sealant and backer rod

Finish floor slab

Precompressed expandable joint filler

Joint filler

Dual Seal® Membrane termination strip. (HDPE sideup. Nail every 600 mm and install 100 mm wideDual Seal® Temporary Tape


Superstop® wrapped around pipe, held in placewith tying wire.

A Dual Seal® Membrane “washer” slipped over pipe. (HDPE side down)

50 mm Dual Seal® Mastic Fillet around pipe.


Interior treatment per architect

Ship lap style expansion joint (preferred)

Joint filler

600 mm wide strip of Dual Seal® Membrane(HDPE side up)

Dual Seal® Membrane (HDPE side up)



Pipe, elevator cylinder or other



Note: RPM/Belgium N.V. makes no warranty with respect to expansionjoints.

Note: RPM/Belgium N.V. makes no warranty with respect to expansionjoints.

10

Detail 13: Through floor penetration (cast-in-place)

Detail 14: Through floor penetration (blocked out and plugged)

Detail 15: Through floor penetration

DETAILS

Superstop® wrapped around pipe, heldin place with tying wire

50 mm Dual Seal® Mastic Fillet aroundpipe

A Dual Seal® Membrane ”washer”slipped down over pipe. (Undersizehole in “washer”. HDPE side up. Dual Seal® Temporary Tape



Concrete blinding layer

Pipe, elevator cylinder or other

Concrete plug (to be placed)

Fold down Dual Seal® Membrane thathas been cut to fit around pipe

25 mm deep Dual Seal® Granular

Compacted granular base

Dual Seal® LG Membrane cut to fitaround pipe (HDPE side down)

Steel dowel to tie mat slab to concreteplug to oppose water head (per struc-tural engineer)

Minimum 50 mm Dual Seal® Granular



Concrete blinding layer

Hydraulic cement plug. (to be foundedconcrete blinding layer to opposewater head)

11

Detail 16: Concrete pile with pile cap.

Detail 17: Concrete pile with mat slab

Detail 18: Footing at interior column

DETAILS

Concrete pile cap.

Treated Plywood (or otherwise stabilized earth)(see section A when cap is backfilled)

Superstop® wrapped around pile

300 mm Dual Seal® LG Membrane corner strip (see detail 5)


Dual Seal® LG Membrane (bentonite against concrete)

1200 g Polyethylene


Pile

Interior column

Superstop® typical all construction joints

Mat slab

Dual Seal® Permanent Seam Tape onto primedconrete

1200 g Polyethylene


Dual Seal® Membrane (HDPE side up) (See figures 5 and 9)

Dual Seal® LG Membrane (HDPE side down) (Seefigures 2 and 6)

Dual Seal® LG Membrane transition sheet(HDPE down)

Nail every 300 mm

300 mm Dual Seal® LG Membrane Corner strip(See detail 5)

Dual Seal® LG Membrane (bentonite side againstconcrete; place to the interior of footing formwork

Footing

Mud slab / concrete blinding layer

Concrete pile

12

DETAILS

Detail 19: Typical fold detail at below floor to wall inside corner

Slit Dual Seal® Membrane or Dual Seal® LGMembrane and overlap as shown

This brochure is not intended to establish product recommendations for any installation. To the best of our knowledge theinformation contained herein is true and accurate at the time of issue, but is subject to change without prior notice. © RPM/Belgium N.V. - 05/2009 (version 2)

Detail 20: Blindside construction of elevator, sump or other below floor pit

Floor slab

Dual Seal® LG Membrane (HDPE side down)(See figures 2 and 6)

Dual Seal® LG Membrane (Bentonite against con-crete)

300 mm Dual Seal® LG Membrane Corner strip.Bentonite side against concrete. Staple edges every75 mm

Superstop® installed 50 mm from outer face of wall

Compacted granular base


Treated Plywood (or otherwise stabilized earth)(See section A when pit wall is backfilled)

section c below slab-on-grade

Documents