Home > Companies > CCL Wetrooms > Linear Screed-Dec and HBL-50

Pre-formed, tapered board with a high density extruded polystyrene (XPS) core and mineral coating, to be installed using self-levelling wetroom compound HBL-50.

Features and benefits:

- Linear Screed-Dec:

  • Has a built-in one-way gradient, which removes the uncertainty of screeding a fall within the shower area by hand.
  • Lightweight and easy to handle.
  • Maintains good thermal properties and compressive strength.
  • Provides a guaranteed, constant gradient.
  • Can be tiled over - especially suitable for large format tiles.
  • Quick and easy to install.
  • Can be used to create a one-way fall towards the wall, a two-way fall with the drain just off the wall, or in the centre of the shower.
  • Can be cut to size or used in combination with infill boards to suit any shower layout.
  • Versatile, and can be installed into a variety of configurations. Please note that additional components may be required for some of these – consult manufacturer for details.
  • Can be provided with a brushed stainless steel tile trim.
  • Available in a range of sizes.
  • Comes with a lifetime guarantee.

- HBL 50:

  • Single component wetroom compound, which uses fibre reinforced polymer technology.
  • Provides a stable base for the Linear Screed-Dec.
  • Linear Screed-Dec can be installed after approx. 12 hours.
  • High-build and self-levelling, with good flow properties.
  • Allows for on-site tolerances within the substrate.
  • Rapid setting.
  • Trafficable after four hours, and ready to waterproof after 24 hours.
  • Poured to a datum 22 mm less than the screed outside the shower area, typically to a depth of 30–50 mm without the need for additional granite chippings.
  • Insulation layers can be installed underneath to complete the overall floor build-up.
  • Comes with a lifetime guarantee.

When the required depth exceeds 50 mm, a suitable insulation board should be used to make up the difference, ensuring it is securely fixed to the substrate.


Suitable for use in shower rooms, and compatible with the use of under tile heating mats.

Suitable substrates include:

  • Concrete.
  • Screed.
  • Flooring grade asphalt.
  • Terrazzo.
  • Existing tiles.
  • Timber floors (must be overlaid with a minimum 15–18 mm thick water and boil proof (WBP) or marine grade plywood, screw fixed at maximum 300 mm centres to both joists and existing boards).

For impervious backgrounds, a slurry bonding coat made of one part primer to two parts HBL-50 should be applied to the substrate using a soft brush.

Related literature

The following content references this product:

Standard product features


  • Thickness: 22 mm.
  • Fall: 11 mm.

Compressive strength (HBL-50):

  • After 7 days: 25 N/mm².
  • After 28 days: 35 N/mm².

Flexural strength (HBL-50):

  • After 7 days: 7.5 N/mm².
  • After 28 days: 9.0 N/mm².



Multiple options can be selected.

  • SDE-03, 300 x 1200 mm.
  • SDE-05, 500 x 1200 mm.
  • SDE-07, 700 x 1200 mm.
  • SDE-08, 800 x 1200 mm.
  • SDE-09, 900 x 1200 mm.
  • SDE-10, 1000 x 1200 mm.
  • SDE-11, 1100 x 1200 mm.
  • SDE-12, 1200 x 1200 mm.
  • SDE-15, 1500 x 1200 mm.
  • SDE-H03, 300 x 600 mm.
  • SDE-H05, 500 x 600 mm.
  • SDE-H07, 700 x 600 mm.
  • SDE-H08, 800 x 600 mm.
  • SDE-H09, 900 x 600 mm.
  • SDE-H10, 1000 x 600 mm.
  • SDE-H11, 1100 x 600 mm.
  • SDE-H12, 1200 x 600 mm.
  • SDE-H15, 1500 x 600 mm.
  • SIP-2, 300 x 600 mm. Infill panel. Used to fill in either side of the drainage compartment where the shower width exceeds 1200 mm. Trimmable on site.

NBS Specification

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This product is associated with the following NBS Create clause:
35-70-70/114 Shower area assembly

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying



CCL Wetrooms


+44 (0)844 3276002

Product reference

Linear Screed-Dec and HBL-50


[ ______ ]

Levelling compound

HBL-50 - Coverage: 3 m² per 20 kg bag (approximately). Consult manufacturer for details.

Accessories/ Other requirements

[Not required]
[SDT-05, tile trim]
500 mm long.
[SDT-07, tile trim]
700 mm long.
[SDT-08, tile trim]
800 mm long.
[SDT-09, tile trim]
900 mm long.
[SDT-10, tile trim]
1000 mm long.
[SDT-11, tile trim]
1100 mm long.
[SDT-12, tile trim]
1200 mm long.
[SDT-15, tile trim]
1500 mm long.

Manufacturer details

Lodge Farm,
Hook Road,
North Warnborough,
Hampshire, RG29 1HA
Tel +44 (0)844 3276002
Fax +44 (0)1256 765100
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