End Grain Flooring

Hjælmø EndGrain Flooring Danish Design Awards Finalist

Product data

Untreated end grain bricks
Waste source
Discarded product from window production
Wood species
FSC certified pine
Northern Europe
11 kg. pr. m² at 22 mm thickness
+/- 1 mm, in each dimension
6-8 week from order confirmation

Origin of the product

Hjælmø end grain floor is upcycled from offcuts and cut-outs accumulated during the production of pine glulam boards and window frames. Today, the sorting criteria are so rigorous that excessive amounts of good quality wood are wasted. The wood is sorted out due to knots, which does not matter in terms of durability and strength, when used as a brick floor. Furthermore, offcuts from ordinary production can be further cut down and also used as end grain flooring. If this waste source had not been saved, the wood would have been ground up and burned for heating, despite the high value of the wood. In the past, hard-wearing end grain floors have been used for industrious indoor environments, such as workshops. Our end grain floor made from offcuts and cut-outs is a finalist at Danish Design Awards 2022 in the Save Resources category. The jury states: "This is an outstanding example of a solution that reuses and recycles resources from another supply chain. Using the right resources in the right places and transforming wood, this design solution shows how to best use what would otherwise be considered waste. It’s fascinating to witness how the wood materials can be recrafted beautifully and, most importantly, the product contributes to starting relevant conversations about recycling and upcycling materials". Hjælme is a sturdy and incredibly hard-wearing type of grass, often found at Vesterhavet, along Denmark's western coastline. Similarly, Hjælmø is a sturdy, hard-wearing floor also from the danish west coast.
Hjælmø offcuts
Hjaelmo End Grain Flooring
Hjaelmo End Grain Flooring

Installation guide

Before laying
The end wood bricks can be installed on a subfloor of concrete, chipboard or plywood with minimum the same thickness as the bricks. The subfloor must be clean and dry and must not deviate more than 2 mm over a 2 meter straight surface.
The bricks must not be exposed to direct water, and the packaging must not be placed directly on a concrete floor or similar.
place the bricks in unopened packaging for a minimum of 8 days in a dry and closed room where the bricks will be installed. This is to acclimatise the bricks and to avoid cracks, fissures or unintended extensions of the wood.

The following room conditions must be maintained:

  • Room temperature: 18-24℃
  • Relative humidity of the room: 40-60% RH

Before installation, we recommend making moisture measurements in different places in the room where the bricks will be installed. The end grain bricks must remain in the packaging until use to ensure bricks are kept at the right temperature and humidity conditions at all times. The above temperature and humidity conditions apply both before, during and after the laying of the end grain bricks. It is important that all work that adds moisture to the room, e.g. masonry and painting work, is carried out before laying the end grain bricks. We refer to following the given adhesive supplier’s instructions in relation to gluing and laying of bricks.

We recommend that the laying of the end grain bricks is performed by a professional. MS Parquet glue 268 from Dana Lim can be used for gluing the end grain bricks. If another glue is used, the instructions from the adhesive supplier must be complied with. MS Parquet glue 268 carries an indoor climate label according to Emicode EC 1PLUS. It is the responsibility of the individual fitter to ensure that the wooden bricks are mounted correctly according to the instructions in the installation guide. For questions or doubts about gluing and laying of the end grain bricks, we recommend to contact the given adhesive supplier. We refer in addition to complying with applicable building regulations. The subfloor must be insulated so that moisture cannot penetrate into the construction. The subfloor can be with or without underfloor heating.

Depending on the type of subfloor, it can be necessary with a moisture barrier. Follow the adhesive supplier’s instructions in relation to any use of moisture barrier.

The end grain bricks can be installed in both a latitude and longitude direction, or in any other desired pattern. Since wood is a living and organic material, the wood will expand and shrink with changes in humidity. The bricks must be installed with 15 mm distance to edges and fixed installations so that the bricks can expand upon changes in humidity.

After laying
Surface treatment of the end grain wood must be carried out at the earliest 48 hours after laying. The sanding must be done carefully too, to get a good result. We therefore recommend that the work is performed by a professional.

Course of action:

  1. Sand the floor with a floor sander diagonally of the bricks. Use an edge sanding for sanding edges and areas by radiator pipes etc. Start with 40 grit and finish with 80 grit
  2. Finish the sanding of the floor with a rotary sander, 100-120 grit
  3. Vacuum the floor and adjacent surfaces (e.g. window sills) vacuum thoroughly before further surface treatment is started. Vacuum only, no other cleaning methods are required.

After sanding, the surface should appear level and smooth and without discrepancies between the end grain bricks. Surface treatment should be performed immediately after sanding. To saturate the wood, surface treatment may be needed several times as end grain wood has a high absorption ability.

Contact a professional for advice on the best surface treatment of the end grain bricks. We recommend giving the bricks a soap or oil treatment.

After laying, the following room conditions must be maintained:

  • Temperature: 18-24℃
  • Relative humidity: 40-60% RH