The choice of waterproofing material for corrugated board

Many builders, without special experience and knowledge, make a big mistake when a 2-3 mm layer of foam substrate is laid between the corrugated board and the crate. This cannot be done, and below we will talk about what such a rash move might lead to.

Tips for choosing a waterproofing material

Any foamed material begins to collect condensation on its surface. Such roll protection usually acts as vapor barrier layers. Directly under the roofing should be a waterproofing film, which is usually capable of passing air and the moisture vapor contained in it.

Waterproofing and protection against steam in the air should not be confused, since the principle of their action is different and they perform different functions. With any method of insulation it is advisable to use both of these technologies, since the first protects the layer thermal insulation material from moisture that accumulates in the form of condensate, and the second should filter moisture from the air, without letting it pass higher. Films designed to create waterproofing are divided into two types:

  • solutions for cold roofs;
  • materials for attics.
waterproofing material Izospan

In the first case, cheaper materials are used. Usually they are called films for waterproofing. For attics, various diffusion membranes are most often used, which are distinguished by a higher throughput for the steam coming from below. Such films can be mounted directly on top of the insulation, i.e. without additional sag. Under the Izospan brand, several types of materials are produced, so it is important not to make a mistake when choosing.

It is advisable to pay attention to those characters that come after the name.

For example, Isospan A - it is wind protection, therefore, it will pass water as a waterproofing. The letters "B" and "D" talk about that the throughput for steam is very lowTherefore, for warm material will not be the best insulation. The properties of diffusion membranes are in the "AM".

waterproofing material Izospan

For warm roofs, which are used to expand the living space, a complex solution is usually used, which allows to simultaneously protect the room from heat loss and perform sound insulation. For example, mineral wool mats do a good job of this.

The design of a roofing cake for warm roofs consists of only three elements, bearing elements and a finishing coating, but an error in the selection of components will nullify all the efforts made during construction.

Video: roofing cake organization

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