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Beneath the rafters, the insulation stays in place
The 1.2 m Wolle P800 roll, fixed to the underside of the rafters, holds the insulation between them in place. No wire mesh, no string.
Technical content: Bogdan Ivănescu, graduate engineer, PhD candidate at the Technical University of Cluj-Napoca · updated on 16.10.2026
Three zones, each with its own role
Once the insulation has been installed between the rafters, fix the Wolle P800 roll to their underside, particularly the 1.2 m roll. Wolle P800 is strong; it does not tear and does not fall, and therefore holds the insulation between the rafters in place, without the wire mesh or string customarily used with glass wool or stone wool.
Holds the insulation in place
Strong; does not tear, does not fall. Replaces wire mesh and string.
Whichever suits you
A screw or wide-head nail, a self-drilling screw with a wide washer, a batten beneath the rafters or directly the plasterboard hangers.
Particularly the 1.2 m roll
Wolle P800, 5 cm thick, in rolls 10 m long: 0.61 m wide (6.1 m²) and 1.2 m wide (12 m²).
Installation steps
Click on the central image to enlarge it.
Products for this application
Frequently asked questions
Why do I no longer need wire mesh?
Wolle P800 is strong; it does not tear and does not fall. Fixed to the underside of the rafters, it holds the insulation between the rafters in place, without the wire mesh or string customarily used with glass wool or stone wool.
What do I fix it with?
With any of the following options: a screw or a wide-head nail (roofing type) or a self-drilling screw with a wide washer; a batten fitted to the underside of the rafters; directly with the plasterboard hangers on which the profiles are then mounted.
Which roll should I choose?
Particularly the 1.2 m roll, unrolled across the rafters.
What comes next?
The vapour barrier and the finish, for example plasterboard on profiles.