Quick answer
A flexible dam is a low rubber or synthetic strip that bends when rolled over or stepped on. A semi-permanent dam is taller, is caulked in place like a curb, and can be knocked out later for a flush entry. Both are backup water control for a curbless shower, not the primary method. Choose based on who uses the shower and how often.
| Flexible (collapsible) dam | Semi-permanent removable dam | |
|---|---|---|
| Material / install | Rubber or other synthetic | Set in place and caulked with silicone sealant |
| Height | Low | Higher; holds water like an integral curb |
| Crossing it | Deflects when rolled over or stepped on | Must be removed for a flush entry |
| Lifespan | Loses flexibility over time and needs replacing | Stays until knocked out |
| Watch out for | Some wheelchair users may struggle to roll over it; people using walkers may not be able to step over or maneuver around it | Looks permanent, so residents and property managers must be told it's removable |
All EZ Able® curbless showers have an optional semi-permanent / removable shower dam available.
Good to know
Where strict compliance with an accessibility code is required, flexible and semi-permanent dams are not allowed and the shower must have a flush, no-threshold entry. An optional dam can be added for a tenant who doesn't need the curbless entry, as long as the tenant and property manager know it can be removed on request.
Read the full guide: Curbless shower water barriers: stop water and stay accessible
No. Flexible dams deteriorate and lose flexibility over time, so plan to replace them.
It is designed to deflect, but some wheelchair users may still have difficulty. Keep the user's abilities in mind.
Yes. It is caulked in place and can be knocked out when a smooth transition is needed.
Not where strict accessibility-code compliance is required. Those showers need a flush, no-threshold entry.
Need a hand?
Call us at 877-392-2531, Monday–Friday, 9–5 Eastern. You can also open a support ticket or chat with Abby on ezable.com.