Non stock item

Ardex K11 Rapid Levelling Compound 22kg

Non-Stock | | 2-3 Working Days

  • Rapid hardening - walkable in 21/2 hours regardless of thickness
  • Free flowing mortar 1.5mm – 10mm
  • Receives floorcoverings the next day
  • Suitable for floors with underfloor heating
  • Excellent surface finish even in thinner layers
  • Suitable for use over traces of adhesive residues
  • Ideal for use with all ARDEX flooring adhesives
  • Can be applied by trowel or pump
  • Low odour and high yield


ARDEX K 11 is a free flowing rapid hardening levelling and smoothing compound designed for levelling and smoothing a wide range of subfloor types including cement/sand screeds, gypsum screeds and concrete. The mixed mortar can be applied up to a maximum thickness of 10mm in a single application but will retain its free-flowing properties at thicknesses of only 2mm to provide
excellent coverage and material economy

  • Rapid hardening – walkable in 2½ hours
  • Suitable for use over traces of adhesive residues
  • Suitable for floors with underfloor heating
  • Pumpable

Unit Size Available: 22kg

Coverage: Approximately 7m2 at 2mm thick per 22kg bag.

Working time at 20°C: approx. 30 minutes

Compressive Strength
After 1 day 7.0 N/mm2
After 7 days 27.0 N/mm2
After 28 days 30.0 N/mm2

Tensile Bending Strength
After 1 day 2.0 N/mm2
After 7 days 5.0 N/mm2
After 28 days 8.0 N/mm2

Suitable for underfloor heating: Yes

More Information

Brand Ardex
Coverage Approximately 7m2 at 2mm thick per 22kg b
Size 22 kg
Type Screeds-Levellers
Width (mm) 0

Technical Info

Delivery Costs:

Delivery fees are calculated based on the weight of your order and your delivery location. You can use the delivery fee calculator in your basket or on the checkout page to find the exact cost.

Delivery Area:

We currently only deliver to UK Mainland and the Highlands. We do not deliver to the Islands, Ireland, or Northern Ireland.

Next Working Day Delivery (Subject to Stock Availability):

Orders placed before 12:00 pm (noon) will be delivered the next working day, excluding weekends and holidays. This service starts from £6.50 (including VAT) and the final cost is based on the weight of your order and your delivery location. You can check the exact cost in your shopping cart or on the checkout page by entering your postcode.

Cut-off Time for Genesis Products (Non-Stocked): 11:00am

Economy Service (2-3 Working Days):

This service is only available for orders over 50kg. There is no additional charge for this service.

Sample Orders:

All sample orders are shipped for free via Royal Mail Tracked 48 or 24 service. Delivery typically takes 1-3 working days.

Delivery Methods:

Non-sample orders under 50kg will be dispatched via DPD or APC Overnight. Non-sample orders over 50kg (quarter, half, and full pallets) will be dispatched via Palletways or Kandrmason.


Simply place your order online and choose the Click & Collect option at checkout.
We'll email you once your order is ready for pickup at your chosen store.
Collection hours: Monday - Friday: 8:30 am to 4:30 pm

For more information, please visit our Delivery Information page.

- Please inspect your order for any damages upon delivery and notify us immediately if you find any.

- We will replace any items that are damaged during transit.

- We accept returns within 30 days of delivery.

- Please note that customers are responsible for the cost of returning items.

- We will process returns and refunds promptly once the items are received at our warehouse.

Returning Trims
Schluter Trime
Returning trims - 35% restocking fees applied.
Returnign trim with replacement - 15% restocking fees applied
Customers are responsible to arrange returning the item.
If we arrange a return colleciton, a £35 return item collection feed will be applied.

Mapei-Profilpas Trims
A 20% restocking fee will be applied. (Item must be in re-sellable condition)
The customer is responsible for returning the item.

For more information, please visit our Return & Exchange page.


Product Questions