Waterproofing for metal roofing - what is it?
Waterproofing the roof of metal roof has long been a real godsend for the owners of their own house. After all, this material, which is a kind of substrate for tiling, perfectly strengthens the roof and thanks to a special impregnation saves it not only from the course and harmful effects of atmospheric precipitation, but also from mold and condensate, which always suffer from metal coatings.
Waterproofing for metal tiles , depending on the place of operation and the type of covering of the underlay film is divided into two groups .In , the first includes materials designed for a permanent and sufficiently long period of use. Especially highly valued membrane waterproofing film.
So, its two layers, reinforced and absorbing, make up a wonderful duet: the first perfectly protects the surface from rain and snow, the second - absorbs so-conducive moisture and fungus, atmospheric moisture, for example, fog, drizzle. As a result, having paid a lot for covering with these materials, you will never regret and for a long time forget that there can be some problems with the roof.
The second group of waterproofing includes significantly cheaper materials, designed for short life. For example, the usual waterproofing included in this group is recommended to be used only for the time of the main repair. After all, it is an ordinary polyethylene layer, which resists only the direct ingress of moisture inside.
Do not use bitumen-based materials!
The type of waterproofing film for metal tiles is divided into classical( with double-circuit insulation), superdiffusion membrane( with single-circuit insulation, positively influences the service life of the roof insulation) and anti-condensate( with double-circuit ventilation, fleecy material, absorbing moisture).
Waterproofing for metal roofs - we will prepare
The whole cycle of the material is preceded by a whole cycle of preparatory roofing works .All of them require a competent approach, even the professional waterproofing will not save the consequences of negligence at this stage.
The following actions are carried out:
- Construction of the roofing system, which is traditionally calculated when designing the roof, taking into account the features of the shape of the cover. All these works are carried out by the team, preferably in dry warm weather.
- Setting of the cornice board in accordance with the hooks of the gutter into the specially cut grooves and fixing the frontal board together with the stitching of the roof overhang to the end part of the rafters.
- Placing the hooks of the gutter under the drainage systems.
Waterproofing of roofing from metal roofing - we lay ourselves
The next step is waterproofing for metal roofing. The material is fixed in such a way that the passing streams of air flow freely from the eaves to the roof ridge and pass through the ventilation holes installed in the highest place of the roof and the ridge seals.
The film is laid taking into account the necessary ventilation and a sagging of 2 centimeters between the rafters. This eliminates material rupture due to sudden temperature changes.
The film is rolled horizontally from the ledge to the ridge, specially insulated with adhesive tape overlapping by 1.5 cm. Now the film must never be turned over to the other side, otherwise there is a risk of damage to the material.
Places of overlap are fixed to the base of the roof with adhesive tape and a construction stapler. Now the waterproofing of the roof is ready, you can proceed to the next stage of erecting the roof!