Boltherm 235P Flame Retardant


Thermo-acoustic insulation composed of double blade unprotected aluminium, double air bubble and foam.

Main Applications
Suitable use in: Roofs and Walls

Main Benefits
-Flame retardant.

-Reflective aluminum capacity in conjunction with the large amount of air trapped inside their cells makes it a highly effective insulation, and in conjunction with polyethylene foam gives you sound characteristics.

Length (m)20.83
Width (m)1.20
Thickness (mm)13
Operating temperature (° C)-25° C to + 85° C
Heat resistance c/10 mm air box on both sides (m2 .° C/kcal)3.19
Thermal conductivity (w/m.k)0.022
Reflectance (%)95
Emissivity (%) 55
Acoustic impact noise reduction (dB)23
Weight (g/m2)775
Maximum compression (kg/m2)500
Air bubble weight (g/m2)408
Aluminum micrage control (u)7my + 50my
Foam density (Kg/m3)20

The appropriate treatment of the covers is one of the most important steps to ensure the thermal efficiency of buildings. The process of boltherm insulation goes against heat transfer: – for radiation, which is an essential component of energy transferred through the covers (particularly in summer, when you can get up to 93%); – by conduction and convection, due to the air bubble in the material and the process of assembling, with dual air box (2 cm deep, at least).

About/Plate Slab

thermal insulation on board

Any insulation placed in low tile must always obey the installation instructions so as not to compromise the effectiveness of your application.

1. fixing of retractor upwards

2. Boltherm placement in longitudinal direction

3. coverage Treated


Walls and ceilings

The treatment of thermal bridges can make a difference in the correct insulation of buildings. For your flexibility and dimensions, the Boltherm products guarantee continuity of insulation, skirting all the building elements (beams, pillars, curved walls or irregularities, ...) and fixing the thermal bridges. The maintenance of air boxes (2 cm deep, at least) is an integral part of the Assembly process and the efficiency of Boltherm solutions.

Between double walls (with box)

1. application of Boltherm retractor

2. application of continuous Boltherm with air box

3. application of second wall with air box

1.232 Boltherm | PVC Retractor
2. Detail of the finishing application in double air box
3. finishing Details of the application of Boltherm on the inside