Yellow sintered expanded Polystyrene (free from additional external expanding agents),with closed cells and high density, “RF”(*) self-extinguishing Class 1 (UNI 8457, 9174, 9177 NORM), obtained from blocks sintered in suitable moulds and seasoned. They are cut into strips of different thicknesses and then lined up and hot-laminated, as a continuous covering, to a reinforced bituminous covering. This acts as temporary waterproofing for the covering as well as a support for the waterproof, always bituminous, layers that will constitute the final waterproofing, or a safety waterproof covering for finishes with discontinuous covering.
(*)The “RF” mark next to the trade name indicates that the product is fire-retardant and self-extinguishing.
VETROROL PS is produced in densities of 20 – 25 – 30 kg/m3 and different thicknesses from 20mm to 100mm, which influence load and thermal resistance performance, depending on the required use.
Depending on their intended use, the membranes to be coupled to the layered composition and the type of support that is to be covered by the VETROROL PS system, have different compositions, reinforcements, areic masses and finishes as follows:
- M.B.P. areic mass 2-3-4 kg/m2, glass fibre reinforcements;
- M.B.P. areic mass 3-4 kg/m2 , TNT reinforcements;
- M.B.P. areic mass 3.5-4.0-4.5 kg/m2, polyester TNT reinforcements and slate-finish.
The particular form of VETROROL PS, in strips in rolls, allows the system to adapt to any covering shape. It is not subject to thermal shock or low temperatures and has a limited linear coefficient of expansion. The nature of the materials used make it biologically inert, non-rotting and it cannot be attacked by insects, rodents or chemical substances that are present under normal conditions of use. The coupling synergy between the EPS and the bituminous membrane easily contributes towards the heat-grometric balance of any correctly designed waterproof pack. Thermal conductivity is equal to 0.034 W/mK (0.029 Kcal/mK) a value referring to a density of 20 kg/m3.
| CHARACTERISTICS |
UNIT |
VALUES |
| Mass |
kg/m³ |
20 |
25 |
30 |
| Thermal conductivity |
W/m.k |
0,034 |
0,037 |
0,037 |
| Resistance to compression ( 10 % def.ne ) |
kg/cm² |
1,05 |
1,55 |
2,30 |
| Coeff. Linear thermal expansion |
mm/m°C |
0,05 |
0,05 |
0,05 |
| Reaction to fire CSE RF |
classe |
1 |
1 |
1 |
| Resistance to vapor diffusion |
µ |
50 |
70 |
80 |
| Absorbtion H2O |
% volume |
3 |
3 |
2 |
FIELDS OF APPLICATION
VETROROL PS is a waterproof heat-insulating system that fulfils different uses in both civil and industrial building.
It is mainly used to produce heat-insulating packs on flat, sloping or any other form of covering, whether new or refurbished, whatever its final use (visible, passageways, pedestrian areas, terraces, or discontinuous tile coverings, bent tiles, sheet metal etc.).
VETROROL PS can also be used as insulation for retaining walls and underground pipes.
LAYING INSTRUCTIONS
VETROROL PS is provided with lateral and top selvage edges for overlapping (from 50 to 100 mm, to be placed in the slope direction), which protect the EPS during laying and torching of the finished pre-fabricated bituminous covering, in order to guarantee temporary waterproofing after welding.
The slate-finish laminated membrane version and welding of the lateral and top selvage create safety waterproofing below the finished discontinuous covering (tiles, bent tiles, etc.). This system will be laid, depending on individual cases, over a suitable steam barrier or over any other type of support. However, previous heat-grometric calculation of the covering will always be necessary.
For coverings with heavy weight, the system can be dry laid on the support or on the steam barrier but, in any case, it must be fastened or glued along the edges and around the technical volume. In other cases, it is mechanically fastened or glued, with the aid of mechanical fasteners.