SLOPING FLOORS TO DRAINS
There are four options for enhancing water drainage on your floor.
(sorted by lowest to highest cost)
- Pre-fill low areas
Birdbaths can be filled level, using high strength urethane grout. This will raise the low spots, and reduce (but not eliminate) puddling in the overall floor. The depth of the puddles will be reduced, and some puddles may be eliminated. The perimeter edges of the “patched” spots will be visible.
- Install Additional Drains
Installing more drains decreases the distance that water needs to be moved, to get it to the drains. However, you are still left with most existing puddles.
- Slope/Pitch the Entire Room/Area at 1% to 2% grade
(effective for wide open areas, and can be cleared of equipment)This option provides guaranteed drainage throughout the entire room/area. The polymer grout is sloped/contoured to the drainage pattern required. Next, a new overlayment (urethane concrete mortar topping) shall be applied over top of this, at 1/4 inch thickness, to complete the system.
Note that this shall increase the height of your floor, at the perimeter edges of the room/area. For example, at 1/4 inch per foot, this adds 2.5 inch to the perimeter height for every 10 feet from the drain. This means that doorways will require ramping down outside the room, or step downs, due to elevation changes.EP Floors can help with the design and installation of these transitions, to minimize impact for traffic in/out of the areas. In general, this option adds 75-100% increase in cost of an overlayment project, and a minimum of one day. However, this is usually more cost effective (and faster) than complete removal/replacement of the slab (see option #4).NOTE: sloping with a polymer grout must be performed BEFORE the new overlayment is installed. Once a new overlayment is installed, the cost for corrective measures increase exponentially.
- Removal of Entire Slab and Re-Pour New Concrete
This option requires extensive noisy heavy demolition, is time consuming, and is usually most expensive option; for existing production areas, the downtime alone can exceed the cost of the work, when factoring in lost production costs.Excavation/removal operations can open up a “can of worms” underneath, with potential damage to existing sub-slab utility lines and plumbing, soil contamination, etc. This option also requires re-installation of new drains, adding even more to the total cost.
PROCEDURES FOR INSTALLATION OF SLOPED, BONDED, HIGH STRENGTH UNDERLAYMENT
- Scarify/profile the concrete for excellent adhesion.
- A bonding agent is applied.
- The 5,000 psi polymer concrete grout is applied next, at a slope consistent with the customer’s requirements.
- The finished urethane mortar topping is applied (typically at .25-.375 inch thickness).
- Sawcut and fill expansion joints in new overlayment with polyurea sealant, to allow movement at building expansion joints.
For up to 2,000 sq ft, a complete turnaround can normally be accomplished over a 3 day period. If performed over a 3 day weekend, downtime is eliminated ! For larger area, contact one of our flooring consultants, for a project evaluation.
Unless a floor section is specified to be sloped to drains, urethane concrete mortar and epoxy flooring overlayments always follow the general contour of the substrate they are applied over.
For more information, including the color availability, technical properties, or other properties of our flooring or any of our systems, please contact the technical support team at our office.