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Venetian blinds
Underplaster Purenit box
Underplaster Purenit box: a hidden home for external blinds.
A thermal-insulation box built into the facade above the window, in which the external venetian blind disappears when raised.
Up to 6 m long
Boxes from 500 to 6,000 mm long; dimension A up to 600 mm, B up to 300 mm and depth C up to 600 mm. Boxes longer than 3,500 mm come in several pieces that are joined on site.
Features
Purenit, the material of the box, insulates very well, ignores moisture and is strong enough to carry blind and roller-shutter systems. Three versions are made: PB, PB-IS with an added layer of PIR insulation, and PB-L.
High thermal insulation
Very low thermal conductivity cuts the thermal bridge at the lintel or wherever the blind is installed.
Moisture and mould resistant
The material does not absorb water and is not attacked by mould, which extends its life; it is also strong and keeps its shape.
Three versions
PB, PB-IS with 20 to 60 mm of PIR insulation, and PB-L; the material can be cut, milled or drilled on site.
Underplaster Purenit box
New houses and renovations where the blind should vanish into the facade.
Write to us for information or a quote
The Active Shade team will contact you about Underplaster Purenit box.
Enquire about Underplaster Purenit boxWhy choose Underplaster Purenit box
Fewer thermal bridges
The insulating box closes the gap above the window where heat usually escapes.
A blind you do not see
The blind disappears into the facade, so only the window remains visible when it is raised.
Long life
The material ignores moisture and mould and keeps its shape over time.
Easy on site
Cut, mill or drill it as needed while the house is being built.
Matching insulated reveals
Insulated window reveals finish the opening and hide the blind's guide rails: PIO in Purenit, SIO in polystyrene and PUR in Purenit. Reveal width A runs from 120 to 3,200 mm.
- PIO – Purenit insulated reveal
- SIO – polystyrene reveal
- PUR – Purenit reveal
Installation, permits and assistance
Whatever you need, we will help you bring your new outdoor retreat to life.
Who helps me with planning and installation?
The Active Shade team supports you at every step: choosing the right model, designing it for your space and installing it.
Contact usCertifications
The box material is classified B2 (normally flammable, self-extinguishing) under DIN 4102-1.
With 20 to 60 mm of PIR insulation the thermal resistance rises from 0.20 to 0.70 m²·K/W and the thermal transmittance falls from 2.94 to 1.19.