# US 5,348,791 A · Foldable waterproofing structure

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- Number: US 5,348,791 A
- Document ID: US5348791A
- Status: Granted
- Kind: A
- Application number: 08/071,212
- Filed: 1993-06-02
- Granted: 1994-09-20
- Earliest claimed: 1988-05-04
- Assignees: W. R. Grace & Co.
- Inventors: Peter J. Thompson; Timothy J. Martin
- Web page: https://patentgrep.com/patent/US5348791A

## CPC

- E04B 1/66: Sealings ({damp-proof courses E04B1/644; fire-proof sealings E04B1/948;} additions of anti-leak properties to plaster C04B; bituminous sealing masses C08L95/00; sealings for hydraulic engineering work in general E02B3/16; against ground humidity or ground water E02D31/02; coverings against rain or other precipitations of the atmosphere E04D)
- Y10T 428/24149: Honeycomb-like
- Y10T 428/24587: Oblique to longitudinal axis of web or sheet
- Y10T 428/24694: Parallel corrugations
- Y10T 428/24711: Plural corrugated components
- Y10T 428/24727: with planar component
- Y10T 428/249982: With component specified as adhesive or bonding agent
- Y10T 428/249983: As outermost component
- Y10T 428/2848: Three or more layers
- Y10T 428/31717: Next to bituminous or tarry residue
- Y10T 428/31815: Of bituminous or tarry residue
- E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001})
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A Structure comprising a membrane of a waterproofing pressure sensitive adhesive material with, contiguous thereto, a layer of relatively rigid covering material so arranged and divided into segments that the structure can be folded at the divisions between the segments.

## Claims

### Claim 1

A foldable waterproofing structure, comprising:
a continuous pressure-sensitive waterproofing adhesive membrane layer comprising bitumen and rubber; and
a plurality of segments contiguous with said waterproofing membrane and spaced apart from each other so as to permit folding, in the manner of a concertina of the waterproofing structure between said segments, each of said segments comprising a material of such stiffness that it does not buckle or bend under its own weight and having a first wall contiguous with said waterproofing membrane, a second wall spaced apart from said first wall, and transverse ribs connecting said first wall to said second wall and forming a channel between said walls; and
mesh, scrim, or film contiguous with or embedded within said continuous pressure-sensitive waterproofing adhesive membrane layer between said spaced-apart segments.

### Claim 2 (depends on 1)

The structure of claim 1 wherein said second wall is perforated.

### Claim 3 (depends on 1)

The foldable waterproofing structure of claim 1 wherein said mesh, scrim, or film is embedded within said continuous pressure-sensitive waterproofing adhesive membrane and thereby operative to reinforce said membrane.

### Claim 4 (depends on 3)

The foldable waterproofing structure of claim 3 whereto said segments further comprise a foam within said segment channels.

### Claim 5 (depends on 3)

The foldable waterproofing structure of claim 3 wherein said segments comprise more than one channel.

### Claim 6 (depends on 3)

The foldable waterproofing structure of claim 3 wherein said segments are formed from polypropylene.