Thermano GK-H2 composite insulation board, 50 mm, PIR and gypsum plasterboard

Internal insulation can also prepare a wall for decoration. In PIR insulated plasterboard the foam is factory bonded to plasterboard, giving one element both functions. This makes it useful for loft conversions and internal refurbishment where floor space is valuable.

Fitting the bonded board installs both the insulation and the plasterboard face. Fewer separate pieces need aligning and the regular board format helps with setting out. After joint treatment and surface preparation according to the chosen system, decoration can begin. In a study or bedroom the insulation sits behind the surface prepared for painting.

PIR’s thermal performance can limit the thickness needed to achieve a given thermal resistance. This leaves more flexibility for furnishings in a narrow room or below a roof slope. A compact board can fit recesses and existing window or door frames. Choose the thickness to balance the thermal requirement and the available depth, especially where a thicker lining would change the room’s proportions.

Rigid boards help set out lining planes and cut around corners and openings. PIR insulated plasterboard can be used in suitable pitched-roof systems and internal wall insulation. Using compatible boards on several surfaces can give loft slopes and vertical walls a consistent finish. Use the supporting structure and fixings specified for the installation. Plan board sizes and joints with the appearance of the finished surface in mind.

Insulating from the room side can improve thermal conditions while retaining the outside finish. This is useful when only the interior is being renovated or the façade needs to stay as it is. The boards can reduce the sensation of a cold surface and prepare it for redecoration. Assess the thermal and moisture behaviour and detail junctions at ceilings and reveals. Select the plasterboard type for the room’s expected humidity.

SteelProfil supplies PIR insulated plasterboard for planned interior refurbishment. Our insulation and building-materials range includes first- and second-grade products, current offers and selected stock available immediately. Check which bonded board suits the room’s intended use.