It can work, but not on every plastered wall
Glass fibre wallpaper can be applied over plaster when the plaster is firm, dry, clean and sufficiently even. The idea is logical: the wall has already been smoothed, and glass fibre can add strength. Still, caution is needed. Fresh plaster can contain moisture, old plaster can be powdery and weak layers may release later.
The first question is therefore not which wallpaper to use, but whether the plaster is healthy enough.
When is it a good option?
Glass fibre wallpaper is useful when extra strength matters. Hallways, stairs, rental properties and heavily used spaces often benefit from a tougher wall finish. For living rooms and bedrooms where the main goal is a calm smooth painted wall, renovlies may be the more refined choice.
Preparation decides the result
Plaster must be fully dry. The wall should then be checked for dust, cracking, suction and loose areas. Small defects need repair before glass fibre or renovlies is installed. Otherwise, restless spots can remain visible after painting.
Common misunderstanding
Glass fibre is strong, but it does not turn a poor wall into a good one automatically. It also does not hide every imperfection. Its real strength is helping the paint system cope better with small movement and daily use.
Conclusion
Glass fibre wallpaper over plaster can be a smart solution when the substrate is sound and extra durability is needed. For a smoother residential look, renovlies is often the better route. The right answer starts with the plaster itself.