What should I do after the floorboards have been delivered to my home?

The floorboards should be stored in a clean, dry room straight away. They are supplied with an average wood moisture content of eight to ten percent. The rooms in which they are stored and in which they are subsequently fitted are therefore required to have a room humidity of 35 to 65 percent and a room temperature of between 18 and 25°C so as to guarantee the ideal fitting conditions.

How should the floor be prepared before its initial treatment?

The floor should be vacuum-cleaned and polished before its initial treatment. This removes uneven areas and dirt. The floor and the room should be dry and the room temperature should be between 18 and 25°C.

What kind of state should the substructure be in before the installation?

The supporting structure must be clean, dry and level. In particular, the screed must not contain more than two percent CM moisture. For information regarding the requirements of other substructures, please contact a parquet specialist.

How are the Hiram floorboards fitted?

Our wood floors are fitted in various ways. Find out more in our guides

Can Hiram floorboards be fitted over underfloor heating systems?

Our floorboards can also be fitted over underfloor heating systems. Depending on the season, the wood flooring can warp slightly. However, as long as the building is well insulated and a stable level of humidity prevails, no significant warping should occur.

What should be taken into account when fitting wood floors from Hiram over an underfloor heating system?

It is important for the underfloor heating system to have been in operation for at least 30 days before fitting the wood floor. This eliminates any residual moisture in the supporting structure. 24 hours before the fitting, the heating system must be switched off and it should only be switched on again slowly one week later.

How often should I clean the floor?

The supporting structure must be clean, dry and level. In particular, the screed must not contain more than two percent CM moisture. For information regarding the requirements of other substructures, please contact a parquet specialist.

Which kind of surface treatment would you recommend?

Hiram floorboards made from Douglas fir require thorough treatment with either soap, lye or oil. Typical surface treatments based on the Scandinavian approach are carried out with white lye and soap or with lye and natural oil. Allow yourself to be inspired by the colour schemes on our “Floorboards” page.

Can the surface also be cleaned with white soap and without lye?

If white soap is used only, a Douglas fir floor looks very yellow in colour. To prevent this from happening and to protect the floor from turning yellow in the long term, we recommend using the lye as a primer and then treating the floor at least five times with white soapy water until it attains the beautiful Scandinavian light shade of colour again.

For the regular cleaning of the floor, we recommend natural soap and white soap every two to three months, to ensure that the surface appears uniformly bright.

Can the floorboards be treated with lye and soap ex-works?

In principle, we can also deliver our products in oiled form, but we advise you against using a pre-soaped surface. This is because experience has shown that the floorboards are trodden on a lot during the fitting process. If scratches or dents were to appear on the surface, the floor would then have to be polished and treated all over again. Treating the floorboards when they are fitted is therefore recommended.

What substructures can be used for Hiram floorboards?

Floorboards from Hiram can be fitted on most of the standard substructures and supporting structures. These include concrete floors, wood and beam constructions.


Why is the terrace decking from Hiram made in the rift and half-rift cut?

Thanks to the special rift and semi-rift cut, we ensure a shape- and dimensionally stable end product which develops significantly fewer cracks and splinters than a standard grained floorboard. The production of this terrace decking is associated with considerable additional costs, but corresponds to demanding aspirations for outdoor areas.

Which colours is the Douglas fir decking in the rift cut available in?

We will be pleased to provide you with an overview of the possible colour glazes on request. Currently, 13 colour options are available. The treatment ensures that the wood is better protected, and delays its greying.

What kind of surface finish do the Hiram Douglas terrace decking in the rift and semi-rift cut have?

We plane our floorboards smoothly and with slight curves on their sides. The smooth planing allows for the rapid drainage of water and is non-slip at the same time. This also makes the visuals of the rift and half-rift cut more clear.

How quickly or slowly does a greying of the Douglas fir terrace decking take place?

The greying of the terrace decking depends strongly on the weather conditions and on whether the boards are treated, coated or untreated. We recommend treating the boards with a coloured oil or a coloured glaze to provide surface protection. In this way, the greying is delayed and the wood is protected against contamination, the colonisation of micro-organisms, cracking and the erosion of the surface.

What kind of joint width is permitted on the Douglas fir rift terrace decking?

With a floorboard width of 120 mm, a joint width of 7.5 – 8.0 mm is recommended. This means that the swelling and shrinking movements of the wood are absorbed and fewer dirt deposits and areas of moisture occur.

Which fastening options are recommended for the terrace decking?

The rift and half-rift terraced decking can be fastened in place with screws visibly from above or invisibly with the use of a fastening system. For a homogeneous appearance and significantly less cracking in the wood, we recommend the invisible screw fastening option. In this case, the floorboards are screwed together with the substructure on the underside with the help of a system. All the fastening material can be supplied together with the floorboards.


What material are the wall panels made from?

Our wall panels are made from solid wood. The wood species are sourced from local forests.

What profile do the wall panels have?

The panels are profiled on the longitudinal side and/or on four sides with a groove and tongue. The rear sides are either levelled or planed with relief grooves.

What surface finishes are applied to the panels?

The panels are planed, brushed, polished, hewn, charred and/or oiled by hand or by machine.

What is the best way to mount the wall panels?

Installing a cross-bar on the wall, i.e. slats at a distance of 40 – 60 cm, is recommended. Depending on whether the panels are then to be mounted horizontally or vertically, the slats should be mounted transversely to them. Screw the panels into the substructure at a 45° angle through the tongue, so that the screws are no longer visible. The top panel and/or outer panels should be screwed onto the construction from the front.

Is there an acclimatisation period for the wall panels?

Only for solid wood panels. The panels are dried to a residual moisture content of approx. 8 – 10% and also stored in this way. The acclimatisation means that the panels adapt to the relative humidity and temperature in the room in which they are later mounted.

Are accessories for the attachment of the panels also available from Hiram?

We also offer the material for the substructure, the screws and eventual treatment products for the surface of the panels.

Where are the wall panels manufactured?

At our partners’ sawmills, planing and joinery workshops in southern Germany and France.


What types of wood are the façades made from?

From local species of wood, such as silver fir, Douglas fir, spruce or larch, which are purchased exclusively in Germany or France.

Are the façades FSC- or PEFC-certified?

The façade elements are PEFC (PEFC/04-31-0049) -certified. FSC® certification (FSC-C023789) is also possible on request.

What profiles does Hiram offer?

In addition to the standard profiles such as rabbet joint, smooth edge or tongue and groove, Hiram also offers block planks with double groove and tongue or rhombus profiles, all with or without a chamfer.

What surface finishes does Hiram offer?

Hiram offers, among others, band saw rough, smoothly planed, brushed or polished surfaces.

What treatment options does Hiram offer?

The façades can be either be rough or pre-greyed with a glaze and/or treated in colour. The glazes can also be mixed according to the order.

How do the Hiram façade elements differ from those from other manufacturers?

As we purchase our own timber, we are able to get hold of an exceptional range of different types of wood in different qualities, and in large and small quantities. Our focus is on the high-quality wood and/or the tree trunks from which we are able to make rift and half-rift façades in small-knot to knot-free assortments.

Where are the façade elements manufactured?

At our partners’ sawing and planing facilities in southern Germany and France.