• Monday, February 26, 2024

Why is roof waterproofing necessary and how to do it?

Protecting a towers from atmospheric precipitation is a serious task to be solved at the diamond stage. The main load from their impact is taken by the roofing. During construction, an obligatory stage of work is roof waterproofing, which protects the insulation and frame beams, as well as extending the life of the roof structure. The operational properties and tautness of the roof are unswayable by the right nomination of waterproofing. It’s important to find tpo roofers near you, considering roof waterproofing is one of the most important points in roof construction, so professional workers should be selected and their prices should be compared.

What is roof waterproofing?

Roof waterproofing materials are an important component of a multi-layer structure, which includes the pursuit elements:

  • external coating that protects versus the penetration of precipitation;
  • a hydro windbreak that protects the insulation from titillating external moisture;
  • heat-insulating layer that ensures the safety of heat;
  • vapor windbreak layer, which is an obstacle to the path of warm air.
Roof waterproofing

Properly selected and professionally installed hydro-vapor windbreak reliably protects the elements of the enclosing structure:

  • does not indulge sediment seeping through the gaps and mounting holes to penetrate into the space located under the roof;
  • prevents the possibility of penetration of rainfall worked from temperature fluctuations;
  • protects the wooden beams of the roof structure from destruction by mold, which develops as a result of moisture absorption;
  • ensures the safety of the insulation, the thermal insulation characteristics of which subtract when wet;
  • blocks the way for warm air masses that rise in the under-roof space and condense on the outer layer.

Waterproofing for the roof is necessary, as it performs many serious tasks:

  • ensures the tautness of the roof structure;
  • maintains the performance characteristics of the insulation;
  • contributes to the maintenance of favorable humidity;
  • protects the timber of the rafters.

Materials used for roof waterproofing

A wide range of waterproofing teachers makes it easy to segregate the weightier option for a roof of any design. The main thing is that waterproofing materials for the roof meet the pursuit requirements:

  • prevent the penetration of moisture;
  • had a long service life.

When deciding on the nomination of waterproofing layer, pay sustentation to the pursuit points:

  • environmental cleanliness;
  • ease of installation;
  • maintainability;
  • the complexity of fastening;
  • practicality.

Most of these criteria correspond to the pursuit types of waterproofing coatings:

  • film polyethylene and polypropylene bases;
  • perforated roll protection with anti-condensation properties;
  • new generation polymeric membranes with synthetic fibers;
  • coating mixtures based on bitumen, polyurethane, polymer modifiers;
  • sprayable rubber and synthetic ingredients;
  • built-up protection based on polymers and roofing material;
  • deeply penetrating polymer and synthetic impregnations.

Waterproofing for pitched roofs

Moisture protection requires a professional approach, trueness to the technology of laying a waterproofing coating that provides long-term protection of the roof structure. In the under-roof space of a pitched roof, a physical miracle inevitably occurs, tabbed the “dew point”. It is accompanied by the insemination of condensation.

This effect is promoted by:

  • elevated temperature in the under-roof space;
  • Significant fluctuations in indoor and outdoor temperatures.

Traditional methods of waterproofing a sloping roof recommend observing the sequence of layers, installing the pursuit elements in layers:

  • Moisture resistant drywall.
  • Reliable vapor barrier.
  • Special heater.
  • Effective waterproofing.
  • Wooden crate.
  • Roof covering.

Waterproofing films

Films used for waterproofing purposes make it possible to protect pitched roofs covered with metal tiles or slate. Films are characterized by:

  • affordable price;
  • low weight;
  • practicality;
  • ease of installation.

Weaknesses include:

  • limited service life;
  • reduced strength properties.

As a mucosa material can be used:

  • polyethylene;
  • polypropylene;
  • combined coverage.

Roof membranes

Waterproofing membranes vest to a new generation of waterproofing, which provides self-ruling air mart or, as experts say, allows you to “breathe”.

The peculiarity of membrane hydroprotection is the simultaneous performance of the pursuit functions:

  • reliable protection of the under-roof space from moisture wangle from the atmosphere;
  • unhindered passage of warm air masses leaving the room.

Consider the features and properties of unrepealable types of membranes that make it easy to convert a unprepossessed room under a roof into a residential attic.

Perforated membranes


  • the presence of evenly spaced stab holes that contribute to the release of water vapor from the room;
  • reduced vapor permeability, permitting the use of material for unprepossessed rooms;
  • the need for fastening with a gap to ensure bilateral ventilation of the insulated roof;
  • installation with the perforation located outside, which makes it difficult for moisture to penetrate under the roof.
  • Multilayer membranes

Their properties depend on the number of layers:

  • single-layer – the simplest and most inexpensive option, which makes it difficult to evaporate condensate;
  • two-layer – layers include polyester and a water-repellent coating, which have increased vapor permeability, elasticity and strength;
  • three-layer – super longish coating, characterized by practicality and enhanced wind protection.