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Thermal insulation from the inside in historic buildings. Insulation without moisture and mold

24 of December '20

RENOTHERM and RENOVARIO panels - moisture protection and insulation from the inside of walls and ceilings


Insulating exterior walls from the inside was not one of the popular solutions. The most common reason for abandoning such an insulation method was the risk of moisture formation inside the structural partition and the appearance of mold on the wall. A safe solution to this problem is RenoTherm ecological mineral board from Ecovario Sp. z o.o., which, in addition to excellent thermal insulation properties, also has the property of rapid capillary rise. The forming condensate in the wall in winter is absorbed by the microporous board and automatically evaporated into the air. This method allows the structural partition to function safely and correctly.

Izolacja termiczna od wewnątrz w obiektach zabytkowych © ECOVARIO

Thermal insulation from the inside in historic buildings

© ECOVARIO

Thermal insulation from the inside
and improving the microclimate

Thermal insulation from the inside isused in buildings where it is not possible to use traditional external insulation. As a rule, these are historic buildings under conservation protection, public buildings, often with decorative and historic facades. Thanks to its very high capillary activity and vapor permeability, the board automatically regulates the relative humidity in the rooms and keeps it at a constant level. These properties allow the use of the RenoTherm board system in libraries, museums, galleries, conference rooms, as well as in basement rooms where there are also moisture problems , such as basements , cellars adapted for catering or office purposes. In this way it pores over and provides a healthy microclimate for the people in them.

By insulating from the inside, we can raise the air temperature in a very short time, even in buildings used seasonally or occasionally.
RenoTherm panels are also used in buildings of unusual construction, such as sports and entertainment venues and underground garages. Areas of both walls and ceilings are then insulated.

Izolacja termiczna od
wewnątrz w obiektach zabytkowych © ECOVARIO

Thermal insulation from the inside in historic buildings

© ECOVARIO

Properties and advantages of the RenoTherm system

  • natural, ecological and friendly material
  • low thermal conductivity coefficient of the material λ=0,040 W/(m-K) allows significant reduction of heating costs and energy savings
  • increase in property value
  • a real sense of thermal comfort and cozy interior
  • provides a friendly and healthy microclimate of the premises
  • technically correct and safe insulation
  • protects against the development of moisture and mold
  • non-flammable material (class A1)
  • easy installation

Installation at a glance

Before installation, the stability and evenness of the substrate should be checked. RenoTherm panels are glued full-surface to the wall on the ridge with RenoKSL adhesive mortar. In the next step, the same mortar is applied to the glued panels, combed with a toothed trowel and embedded in a reinforcing mesh, and then trowelled. Finally, we cover the smoothed boards with a coat of paint with high water vapor diffusion, such as silicate paint for interiors, lime or chalk paint.

RENOVARIO moisture and mold control system

Mildew can form and grow in places with favorable conditions, namely: moisture, proper temperature and substrate. The causes of mold formation are generally well-known: excessive indoor moisture production (washing, cooking, drying) in tandem with inadequate ventilation, wall frosting, workmanship errors and associated so-called "thermal bridges" and others. At low outdoor temperatures and high relative humidity of indoor air in insufficiently insulated areas, condensation can occur.

Izolacja termiczna od
wewnątrz w obiektach zabytkowych © ECOVARIO

Thermal insulation from the inside in historic buildings

© ECOVARIO

As a pictorial example, we can use, for example, the phenomenon of fogging of the mirror after taking a bath. An effective solution to this problem is the use of the Renovario climate board system, which prevents the formation of condensation water and mildew, and at the same time improves the thermal and moisture comfort of the rooms. The high degree of capillary rise of the material causes rapid and self-evaporation of condensate, and the alkaline pH further protects against unwanted mold.

The use of the Renovario climate board system

  • protects the wall surface from moisture and mold
  • eliminates the unpleasant smell of musty odor in the room
  • improves the thermal comfort of the building
  • Regulates and ensures a healthy microclimate in the room

Izolacja termiczna odwewnątrz w obiektach zabytkowych © ECOVARIO

Thermal insulation from the inside in historic buildings

© ECOVARIO

Elements of the Renovario climate board system

In addition to the Renovario Climatic Plates, the system consists of special installation components that, thanks to their properties, ensure the proper and trouble-free functioning of the actively capillary system:

  • fungicide RenoFungi (for removing fungus)
  • PK adhesive mortar (for gluing the panels)
  • RenoGrund primer (for priming the panels)
  • Gładź PK1 smoothing compound (for smoothing the boards)
  • RenoCoat silicate paint (for painting smoothed boards)

The Renovario Climatic Tile System is a professional, complete renovation system for removing moisture and mold from wall and ceiling surfaces.

For more information, visit the company's Ecovario Sp. z o.o. page on the A&B portal.

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