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Requirements

01

Block or Brick wall

Please make sure the openings you are protecting are supported by block or brick walls. Setting a flood barrier on a stud wall will put the entire wall at risk of collapsing.

​

02

No Drywall

Even if you have a block wall behind your flood barrier should never be against drywall or sheet rock.​

03

No Crawlspace

Even if you block the opening of the crawl space, it is very likely that the water will be siphoning from the ground and infiltrate your house. Flood barriers will slow down the water but not stop it.

04

Cracks, outlets, vents

Blocking the openings with Flood barriers is only the first step of a dryproof process. Please make sure you secure walls, outlets, pipes, vents, etc.​

05

Wall surfaces

If your walls are too sleek (such as aluminum or painted wood), we will apply a gripping texture to the wall to provide a better grip.

If your wall is textured and has an inset larger than 1/3 of an inch, we will need to fill it up.

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Compatible

Screenshot 2025-06-15 190637.png

If the grouts are less than 0.3"

Not
Compatible

Need
modifications

Screenshot 2025-06-15 190637.png
Screenshot 2025-06-15 190637.png

Single-Chamber
Flowstop

The single-chamber Flowstop is a barrier that pushes against 4 walls. It has a gasket on each of the 4 sides.

​

Best Use for Vents, Windows, or to protect against waves.

Please note, your barrier will not protect against over 42" of flood water.

Specifications

  • The single-chamber pushes against 4 walls

  • Gasket on 4 sides

  • Customized for any Height

  • Max. Width is 275"

  • Standard depths are 6" or 8", depending on Width (See Depth Table)​

  • When a 6" flowstop won't fit, non-standard depths are also available, depending on Width (See Depth Table)

  • Posts can be installed to increase the depth of the opening.

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Depth Table

Non-standard Depth
Non-standard Depth
Non-standard Depth
Standard Depth
Standard Depth
Width of your Flowstop
0" to 31"
31" to 39"
39" to 47"
47" to 78"
78" and over
Flowstop Depth Minim available
2.8"
4"
4.7"
6"
8"
Depth required on the wall
1.8"
2.6"
3.1"
4"
5.3"

Double-Chamber
Flowstop

The double-chamber Flowstop is a barrier that pushes against 3 walls. It has a gasket on both sides and the bottom.

​

Best Use for Door, Windows, garage door, Large opening

 

Please note, your barrier will not protect against over 40" of flood water.

Specifications

  • The double-chamber pushes against 3 walls

  • Gasket on 3 sides

  • Minimum height available is 31.5"

  • Standard depths are 6" or 8", depending on Width (See Depth Table)​

  • When a 6" flowstop won't fit, non-standard depths are also available, depending on Width (See Depth Table)

  • Requires Straps after a certain Width (See Straps table)

  • Available in specific heights (See Height Table)

  • 2 Chambers that inflate separately

  • Posts can be installed to increase the depth of the opening.

Depth Table

Non-standard Depth
Non-standard Depth
Non-standard Depth
Standard Depth
Standard Depth
Width of your Flowstop
0" to 31"
31" to 39"
39" to 47"
47" to 78"
78" and over
Flowstop Depth Minim available
2.8"
4"
4.7"
6"
8"
Depth required on the wall
1.8"
2.6"
3.1"
4"
5.3"

Height Table

Height available
31.5'
35.5"
39.5"
43.5"
47.5"
51.0"
55.0"
59.0"
Flood water protection
26.5"
30.50"
34.50"
38.50"
40"
40"
40"
40"
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Strap Table

Width of the Flowstop
78" to 95"
95" to 135"
135" to 275"
# of straps required
1
2
4
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