4.1 Chipboard- / OSB wall coating (dry rooms)

General

This coating work method is indicative and deals with the coating of a chipboard- / OSB wall with the ELAPROOF + SAND system. The ELAPROOF + SAND wall covering system consists of ELAPROOF PRIMER primer, ELAPROOF + SAND wall covering and ELACOAT TOPCOAT RAL / ELACOAT TOPCOAT topcoat

The coating work method is not a repair plan or a construction plan. The overall design of the coating is always the responsibility of the site-specific designer.

Platform refurbishment

In areas to be renovated, all possible moisture-sensitive adhesive residues must be removed from the chipboard- / OSB floor. Any loose floor screeds must also be removed in their entirety.

Any gaps between the boards, screw holes and cracks in the board surfaces must be filled / levelled with a wall level suitable for chipboard- / OSB surfaces. A wall level suitable for chipboard surfaces should also be used for possible over-levelling. When using screeds, also check with the floor screed manufacturer for a suitable primer.

Primer

Prior to coating, cleaned and repaired chipboard- / OSB substrates are primed with ELAPROOF PRIMER without the addition of water. Allow the primer to dry completely before applying ELAPROOF + SAND. The purpose of the primer is to seal the surface of the chipboard from the moisture released by the incoming coating.

Chipboard walls painted with a good quality primer do not need to be primed separately. Old primer or topcoat coats can be sanded mechanically or treated with suitable washing liquid to ensure adhesion of ELAPROOF + SAND Wall covering. In these cases, it is also recommended to carry out a separate adhesion test before treating larger areas, to ensure that the adhesion between ELAPROOF + SAND Wall covering and the paint and at the same time sufficient adhesion of the original paint to the substrate after the coating is applied.

Coating

Before starting the coating, the ELAPROOF + SAND Wall covering must be mixed. Use a mixing paddle in the mixer that does not take air into the sealant when mixing, eg COLLOMIX KR series mixing paddle.

The primed substrate is coated with ELAPROOF + SAND (M1 / EC 1) wall coating. The coating is applied to the substrate with a steel spatula.

ELAPROOF + SAND Wall covering is applied to the substrate in two separate applications. The consumption of each application must be at least approx. 1.0 kg / m², in which case the total consumption is at least 2.0 kg / m². The actual dry film thickness must be min. 1.0 mm.

The drying time between coats of ELAPROOF + SAND depends largely on the conditions at the installation site. At conditions of approx. + 20 °C, 50% RH can be applied a second time approx. 5 h after the first application. Lower temperatures and higher humidity significantly extend the drying time.

The ELAPROOF + SAND Wall covering applied twice can be applied after approx. 12 hours in conditions + 20 °C, 50 % RH.

Topcoat

The dried ELAPROOF coating is treated with clear ELACOAT TOPCOAT or tinted ELACOAT TOPCOAT RAL topcoats to facilitate cleaning and maintenance. For monochromatic floors, we recommend top coating with tinted ELACOAT TOPCOAT RAL topcoat to even out any colour differences in the ELAPROOF + SAND coating. On flaked floors, we recommend flaking with ELAPROOF PVA paint flakes on wet ELACOAT TOPCOAT RAL topcoat and, after drying, finishing with clear ELACOAT TOPCOAT topcoat.

In the topcoat, the topcoat component A is first mixed for 1 to 2 minutes, then the hardener component B is added to the mixed A component and mixed again for 2-3 minutes. Use, for example, the COLLOMIX KR series mixing paddle for mixing.

The mixture is applied on top of the dried ELAPROOF coating with a short-pile roller (6 – 7 mm) by cross-rolling. The consumption of the topcoat is approx. 110 – 200 g / m2 / application, depending on the degree of roughness of the selected ELAPROOF + SAND coating. The topcoat is dry to dry after approx. 16 h at + 20 °C, 50% RH. The full duration of mechanical stress is achieved under the above conditions in about 4 days and the full chemical duration in about 7 days.

NOTE! Some shades of ELACOAT TOPCOAT RAL topcoats may require 2 to 3 coats to achieve sufficient coverage! See a separate table for the coverage of ELACOAT TOPCOAT RAL topcoats.

Build Care Oy owns all rights to this coating work method. Designers are free to use this coating work method when creating repair and coating plans!

ALWAYS READ THE PRODUCT DESCRIPTIONS FOR THE PRODUCTS PRESENTED IN THE COATING WORK METHOD BEFORE STARTING THE INSTALLATION!

Structural drawings

All structural drawings related to ElaProof products in DWG and PDF format from the ProdLib-service.

Updated: 01/2022 | JKo