Polyvinyl chloride (PVC) membranes - a polymer waterproofing material based on plasticized polyvinyl chloride . To give PVC plastic the necessary flexibility, plasticizers are introduced into its composition, and a reinforcing mesh made of polyester gives the necessary strength and prevents shrinkage.
Content
Building
PVC membranes consist of two layers of plasticized polyvinyl chloride, separated by a reinforcing mesh.
To reduce heatability due to maximum reflection of sunlight, the upper layer of the membrane is made light. This layer consists of filler (48%, usually chalk is used as filler), plasticizers (about 35%), stabilizers and flame retardants (up to 14%) and dyes (3-4%, usually titanium oxide ).
The bottom layer does not contain stabilizers and flame retardants, and is performed in dark colors.
Application
PVC membranes are often used for roof waterproofing , and in such cases are usually called "roofing waterproofing coatings." In Europe, they have been used since about the 1960s , and in Russia only since the 1990s [1] .
Waterproofing materials must meet important criteria, such as reliability, operational experience, simplicity and manufacturability. PVC membranes meet all these criteria, and are quite affordable, therefore, at present they are one of the most common roofing waterproofing materials.
Advantages
PVC roofing membranes in comparison with conventional bitumen-polymer materials have the following advantages:
- are not critical to temperatures, and the installation of PVC membranes can be done at temperatures up to -20 ° C;
- have fire fighting properties;
- easy connection of membranes with a stream of hot air allows the use of automatic welding machines;
- mechanically more durable;
- more resistant to chemical, mechanical and thermal influences;
- elasticity is maintained over a wide temperature range;
- do not require special maintenance after installation;
- high maintainability;
- the service life is at least 20-25 years;
- provide waterproofing in the most vulnerable places due to the presence of additional non-reinforced membranes for complex junctions, overlays on the inner and outer corners of the roof elements and others;
- the roof of PVC membranes is easy and quick to install (a link of 3 people can make up to 1000 m2 per shift);
- Reliable, and most importantly - the cost of installing and installing PVC membranes is much lower than the work on the device of the roof in other ways.
Notes
- ↑ Features and prospects of the use of polymer waterproofing membranes in Russia (inaccessible link)