Roof insulation provides the greatest means of saving energy. Furthermore, it is often simple to install and DIY friendly.

ATTIC FLOOR INSULATION

If the attic is not used, it is useful to insulate its floor (A in Figure 1). The insulation product is simply laid down. In this way, a surface on which to walk occasionally is created.

To be noted is the correct position of the insulating product, which allows the flooring's thermal inertia to be maximised. The panels can be laid over other insulating materials such as panels, rolls or loose insulating products. Celenit also provides boards that can be walked on (B in Figure 1).

Figure 2: Attic floor insulation using leaf-edged Celenit P2 panels.

ROOF PITCH INSULATION

Wooden roofing

Panels are placed above the beams to form a board structure which substitutes the wooden planks or the hollow tiles. This has many advantages: it does not cost more, it insulates more, it is a barrier against fire and it transpires, thus contributing to the removal of humidity and to maintaining a healthy structure. Due to their mass and specific heat, the panels have a great capacity for heat accumulation, an important fact which is particularly appreciated in the summer months.
The panels can be supplied in two sizes, 200x60 and 240x60 cm, in order to adapt better to the distances between the beams. Celenit R panels reinforced with wooden fillets are used for larger distances.

The Celenit panels are either left visible, plastered or covered with gypsum board (in the latter case, panels already prepared with Celenit CG/F fire resistant gypsum board can be used). If a matchboard finish is used, the panels are placed above the matchboard surface, thus obtaining a continuous layer of insulation without thermal bridges. The compression resistance feature of Celenit panels means that the support purlins of the roof structure can be applied directly onto the panels (C in Figure 1).
In existing buildings, panels are placed beneath the beams. In this way, extra insulation can be placed between the beams.
Thus, an optimal result is obtained: thermal inertia is increased, humidity regulation is improved, the level of fire resistance is increased and the impact of external sounds, including weather noises (rain, wind, hail) is reduced, ensuring optimum living conditions.

Figure 3: Insulation above beams using Celenit N panels

Figure 4: Insulation under beams using Celenit P3 panels

 Figure 5: Insulation on a lamellar wood structure using Celenit R panels

Brick cement roofing

The panels are applied to the upper surface of the roof flooring either during or after the final casting. They are fixed with mortar, bitumen or plugs. Then, a waterproof, non vapour-proof membrane is laid out, and above that the roof structure.
In ventilated roofs, either the support elements of the roof structure or under-tiling products such as corrugated plates, polystyrene, etc are placed above the panels.

Figure 6:  Brick cement roofing insulation using Celenit N panels

Celenit roof flooring

In new buildings and when rebuilding roofs, it is suggested that the roof flooring be cast on site on a board structure of Celenit panels, for use as a permanent formwork.
Lightening elements would consist of polystyrene blocks or common brick pot forms (see False ceilings). In this way, a light roof flooring which is acoustically and thermally insulated as well as highly fire resistant could be obtained in a single step. 

INSULATION UNDERLAY WATERPROOFING SHEETS

The panels are laid joggled and fitted closely next to one another along the roofing. Leaf-edged panels can be used in order to improve thermal insulation, by eliminating thermal bridges and relating condensates. Alternatively, insulation could be carried out in crossed layers, firstly using expanded or mineral-fibre materials and secondly using Celenit panels, which are more stable in the event of thermal and mechanical stress. The panels can be fixed in various ways, according to the existing support: with oxidized bitumen melted on either key-patterned pressed steel sheet or on any other support; dry, with screw anchors in the proportion of 6 plugs per square metre; with common mortar; with binders. The bituminous sheets are applied directly onto the panels without the need for a primer, as they adhere strongly and permanently. There is no need for slide-layers, given the concrete-like high level of dimensional stability of the panels (see Technical Characteristics). In multi-layered panels, the wood and cement layer contributes to spreading the weight, which makes the roofing accessible for maintenance operations. Furthermore, due to its heat accumulation property, this layer protects the polystyrene layer and the waterproofing layer by limiting thermal excursion.
The roofing is guaranteed against sagging and subsequent cracking, thanks to the mechanical characteristics of the panels together with their stability over time and the fact that they do not suffer degrading, even in the presence of water seepages.

Figure 7: Roofing of industrial sheds, using Celenit N panels, 75 mm thick