Duofor Dovetailed Sheeting

On a joist: Place the sheets on the joists perpendicular to the direction of the profile. The sheets overlay the joists lengthwise by approximately 100 mm.

On floorboards: Apply the sheets at right angles to the beams, parallel to the floor boards. The sheets overlap at any point by 50-100 mm.

Wider direction: Only the end flanges (top and bottom flanges) should be stacked: colour on colour / blank on blank.

Longitudinal direction: Place all sheets alternately with the sticker up and down: colour on colour / blank on blank.

The most economical is to use panel lengths that correspond to a multiple of the centre-to-centre distance of the beams + 100 mm extra for the overlap. 

1300 mm: 2 x 600 mm + overlap; 1900 mm: 3 x 600 mm + overlap.

1600 mm: 3 x 500 mm + overlap; 2200 mm: 3 x 700 mm + overlap.

For the deviating centre-to-centre dimensions, the lengths are 

1220 / 1530 / 1830 and 2000 mm, or special sizes are available.

Lay the even row of plates B, with the sticker facing down.

Place the odd row of plates A, with the sticker facing up, in the even rows. So in the overlap the plate with the sticker up is also the top plate. The length overlap of the sheets is approx. 100 mm. In width, only the outer lower and upper flanges are laid on top of each other. The working width of the board is 610 mm maximum. When installing on a joist, overlap the sheets on a joist.

Based on the width, height, centre-to-centre measurement and the largest span, Shire can calculate the strength and stiffness of the beam layer.

Required additional information:

- What type of ceiling is suspended from the beam?

- Will there be partition walls on the floor? 

- What is the useful floor load (house, office, etc)?

- How thick will the dovetailed sheet floor be with mortar?

- What is the floor finish?

To make holes, recesses or cut to size, use an angle grinder with a thin metal disc.

Yes, the Duofor dovetailed sheets can span more than 600 mm without any problems. Duofor floors have been tested up to spans of 2.5 m.

Yes, the Duofor dovetailed sheets can span more than 600 mm without any problems. Duofor floors have been tested up to spans of 2.5 m.

If the boards are not nailed, approx. 35 mm mortar can be applied to a span of 1.2 m without backing. 

If the boards are nailed, approx. 50 mm mortar can be applied to a span of 1.5 m without backing.

Preferably, nail each joist through the top flange, do not screw. 3 wire nails per sheet width. In this way, the floor becomes stiffer and any shrinkage and/or creep of the joists is absorbed. When using underfloor heating, nail very lightly. 2 wire nails per sheet width. 

The dovetailed sheets may, with the exception of the soundproofing floor, always be fixed in place.

Standard residential floor 20 mm / utility floor 33 mm.

Sound insulating floor 34 mm / underfloor heating 40 mm.

Spans larger than 1.5 to 2.5 m, 54 mm or more.

Duofor dovetailed sheets have been tested with various mortars types. 

Sand cement: CT-C20-F4 quality, usage 10 L/m2/cm. 

Concrete: C20/25 quality, usage 10 L/m2/cm.

Light concrete: C20/25 quality, usage 10 L/m2/cm.

Mortar: CT-C16F3 quality, consumption 10 L/m2/cm. 

Caution! Approx. 8 L/m2/cm extra for the sheets backfilling.

After 3 days, the floor can be walked on carefully. 

After 1 week, the floor has approximately 80% of its final strength. 

Standard rule: 1 week per cm before the floor reaches its final strength.

Poured mortar can be walked on after one day.

No, the Duofor dovetailed sheet serves as reinforcement.

No, the dovetailed sheet can serve as earthing.

The edge connections become watertight by sealing the horizontal and vertical connection with paste and sealing tape. First of all, a paste is applied to the bilge, then a membrane tape and finally a second layer of sealing paste. 

After tiling and grouting, seal the joints permanently.

If you are using sand cement or poured mortar, the tiles can be bonded directly. Allow the mortar to dry for at least one week. It is preferable to use a flexible tile glue for bonding.

See processing recommendations glue manufacturers.

The Duofor dovetailed sheet floor is fire resistant for 60 minutes. Floorboards or underlayment are not necessary for the fire resistance. The beam layer is the determining factor of the fire resistance. 

The ceiling is only an extra protection so is less critical.

The floor construction must be carried out in accordance with the regulations. You can always contact Shire. without any obligations.

Apply the DTS-G sound insulating strips to the joists or floorboards. Keep the total floor free from walls, pipes and lead-throughs by using a mineral wool, edge strip. Do not nail the boards!

No, if you choose a material that is too hard, there will be no spring action, which is detrimental to impact sound insulation. If you use a material that is too soft, small hairline cracks will appear in the mortar during the lubrication process, due to the spring action. These will be even more noticeable after complete drying. A material that is too soft can also spring back more than desired over time due to the permanent load on the floor and the useful load. This will cause connection cracks to appear with the, pipes and lead-throughs. This also has a negative effect on sound insulation over time.