CUTTING - STORING - USE

The panels are cut with a handsaw or a circular saw. They can be stored in the open. They must, however, be used dry and laid close to one another, pressing slightly, and with joggled joints. It is advisable to acclimatise the panels to room temperature by opening the stacks of panels and keeping them in the room for a few days before laying them. In the case of false ceilings and facings, keep some openings in order to balance the thermal- hygrometric state of both sides of the panels. Avoid overheating immediately after fitting the panels.

METHODS OF SECURING THROUGH ADHESION

Permanent formworks

The panels are placed inside the formworks and adhere to the concrete casting. Multi-layered Celenit P3 - Celenit L3 panels are laid on site with plastic and metal anchorage, 6 per panel, particularly when applied horizontally. The length of the anchorage is 40mm greater than the panel depth.

Fixing with anchorages

The surface on which the panels are to be fixed (walls and floorings) must be flat and be able to carry a certain amount of weight. The panels are applied both internally and externally, using 8 anchorages per square meter which, in the case of plastic anchorages, penetrate the support by 50mm and, in the case of metal anchorages, by 30mm. Inside, if the panels are visible, the number of anchorages used can be reduced.

Fixing with mortar and binders

The panels can be fixed using cement mortar and sand and, inside, with binders for gypsum board. The mortar is applied to the panels in crosswise strips parallel to the short side, either 30 - 50cm apart or per point (15 per square meter). The panels are then applied to the wall with a light pressure and, if necessary, fixed at the first fastening stage with 4 nails, one in each corner. Multi-layered panels (Celenit P3, Celenit L3) applied externally also need to be fixed with plugs. If the panels are then to be plastered, in order to avoid tension, a good consistency rendering of coarse-grained sand and cement must be applied as soon as the binding mortar dries.

PANEL FIXING PRODUCTS

a) Anchorage to fix panels invisibly to wooden structures.

b) Nails and screws with washers to fix Celenit to wooden structures.

c) Plastic anchorage for fixing Celenit to pours of concrete.

d) Metal spirals for fixing Celenit to pours of concrete

e) Expansion pins.

f) Metal washers to fix Celenit to ceilings and walls.

PLASTER REINFORCING NETS

a) Galvanized net h cm 8 stapled to apply to joints;

b) Galvanised net h cm 100 for thermal bridges, corners, etc.;

c) Fibre glass net h cm 100 for plaster

FIXING SYSTEMS ON PROFILES AND FRAMEWORKS

False ceilings and facings

The panels are inserted by their long side on metal profiles, which are fixed to the ceiling and walls according to the supplier's instructions. The crosswise joints are supplied leaf-edged or covered with a metal profile.

Application on a wooden framework

The panels are fixed to the wooden structure using nails or screws with washers, 4 per panel. In the absence of washers, the nails are applied crossways.

The size of the laths and the distance between them can be found in the table below.

Application on metal structures

The intervening spaces and the number of fixing points are the same as for wooden structures (see table).

PANEL FINISHING

Visible panels

In false ceilings, in sound-absorbing facings and in floorings for cellars, garages, attics and mansards, the panels are left visible. This allows their sound-absorption and thermal-hygrometric regulation characteristics to be exploited to the full. The panels are supplied with different types of edges: Square-edged, round-edged, leaf-edged and with particular processes for suspended false ceilings.
Upon request, the panels can be supplied painted in various colours. They can also be spray-painted on site using water-based paint.

Gypsum board facings

This offers many advantages from a practical point of view and from the point of view of acoustic insulation and fire protection. Gypsum boards adhere to normal and multi-layered panels as they do to masonry walls. Therefore, the rules for fixing to walls apply for them. When Celenit R panels are used, the gypsum boards are fixed to the panel laths with screws.

Plaster facings

If plaster is to be applied, please note the following:
- panels with joggled joints must adhere perfectly to the support, and any cracks must be filled in with insulating foams, mineral wool or other similar products.
- the plaster must be applied to dry panels at the appropriate temperature ranges, in other words the temperature must not fall below 5°C nor exceed 25-30°C, in order to avoid cracking. Furthermore, the plaster must be protected from freezing temperatures and from direct sunlight.
- every layer of plaster must be dry and have fully set before the next layer is applied.

External plaster

As soon as they have been laid, the panels are covered, joints and all, with a coarse-grained sand and cement rendering (8mm deep). Then, it is necessary to wait until the rendering has fully set and slight signs of cracking appear (2-4 weeks). Then, the base layer of plaster, with a low content of cement (one shovel per concrete mixer), is applied to a thickness of at least 15mm. When the plaster has dried (a couple of weeks), a layer of plastic plaster, reinforced with a glass-fibre net, is applied. In order to reduce heat tension, it is advisable to paint the finished structure a light colour.

Internal plaster

After a coarse-grained sand and cement rendering has been applied, wait until it has fully set and for slight signs of cracking to appear (4 weeks). The rendering (8mm deep) must cover the entire surface, particularly the joints.

Gypsum-based plaster: apply a 15mm thick layer of gypsum-based plaster, reinforced on the surface with a glass-fibre net, to the dry rendering.
Lime-based plaster: the same procedure as for external plaster applies - a layer of plastic plaster, reinforced with a glass-fibre net, is applied to the dried out base layer of plaster.

Premixed plaster

It is always advisable to apply premixed plaster, both for exteriors and interiors possessing the characteristics suitable for use on insulating materials. Please contact the company for further information in this regard.

Facing with tiles

Normal and multi-layered panels are fixed to the wall with 8 plugs. Next, they are covered all over with a galvanised metal net, and then with a 10mm thick coarse-grained sand and cement rendering. The tiles are applied when the rendering is dry.

VENTILATED WALLS

A wooden lathing, fixed to the support, is placed on the panels. 25 mm panels are fixed to the strip and then plastered. This results in a traditional external appearance, considerable flexibility of adaptation, acoustic insulation and protection from fire.