Construction of a garage, shed or temporary canopy often rests on the choice of roofing material that would combine affordable cost and high reliability. ruberoid For decades, it has remained one of the most sought-after solutions for flat and pitched roofs due to its versatility and time-tested efficiency. Properly executed laying of this material is able to ensure the tightness of the coating for 15-20 years, protecting the structure from rain, snow and wind.
However, for the roof to last a long time, it is not enough just to roll roll rolls on the surface. The technology requires careful preparation of the base, the correct choice of the type of material and compliance with the temperature regime during installation. In this article, we will discuss in detail how to prepare the roof, what mastic to choose and in what sequence to lay the canvases to avoid leaks and bloating.
Before proceeding with the purchase of materials, it is necessary to conduct accurate calculations of the roof area, taking into account the covers. Technonicol Other manufacturers offer different modifications, so it is important to understand the difference between lining and roofing types. Ignoring these nuances can lead to the fact that the coating will begin to crack after the first winter, requiring expensive repairs.
Choosing the right type of ruberoid and tools
The first step in preparing for installation is a competent selection of material, as the market offers many modifications, differing in base and sprinkle. For the lower layer is usually used ruberoid (marked with the letter P), which has no protective sprinkle and is used exclusively for waterproofing. The top layer should be more durable, so it is chosen for it. roofing (marked with the letter K) with a coarse-grained sprinkle of stone chips or mica, protecting bitumen from ultraviolet light.
It is important to pay attention to the basis of the material: it can be cardboard, fiberglass or polyester. Glass canvas and glass-woven They are much stronger than cardboard and less prone to rot, making them preferred for durable designs. If you plan to put the material on a wooden base, it is worth considering modern options with a self-adhesive base or Euroruberoid, which requires less mastic.
⚠️ Note: Do not use a cardboard-based material for the top layer of the roof if you plan to operate the building for more than 5 years without major repairs. Cardboard quickly absorbs moisture at the slightest damage to the bitumen layer.
For high-quality work you will need a specific set of tools that are better prepared in advance. Lack of the necessary inventory can delay the process and reduce the quality of the adhesion of the layers.
- 🔥 Gas burner or soldering lamp for heating bitumen mastic and melting materials.
- 🧹 Hard broom and industrial vacuum cleaner for cleaning the surface from dust and debris.
- 🪣 A container for preparing mastic and a long stick for stirring it.
- 🔪 A sharp construction knife or axe for cutting canvases.
Also, do not forget about personal protective equipment. Working with hot bitumen and open fire requires tight clothing, gloves and shoes on a thick sole. Bitumen pairs It is toxic, so the presence of a respirator is a mandatory safety requirement.
Preparation of the basis and calculation of the amount of material
The quality and durability of the roofing carpet directly depend on how well the base is prepared. The surface should be perfectly flat, dry and cleaned of any contamination. If you lay a ruberoid on a concrete slab, you need to seal all cracks and potholes with cement mortar, and then let it dry completely.
Humidity of the base is a critical parameter that is often ignored by beginners. If you put the material on wet concrete, then when heated by the sun, the water will begin to evaporate, forming bubbles and detachments. Check the humidity can be a simple folk method: put a piece of polyethylene on the surface and press its edges. If after a day under the film did not form condensation, you can proceed to primer.
To improve adhesion, be sure to treat the concrete base with a bitumen primer. This will bind the residual dust and create a sticky film for better adhesion.
Calculation of the number of rolls is made taking into account the area of the roof and the mandatory overhangs. A standard roll is 1 meter wide, but the useful width is reduced by overlapping the strips. Vertical overhang is usually 10-15 cm, and horizontal - 15-20 cm. For single-layer coating, the flow increases by about 10-15% of the total area.
If you plan to multilayer stacking (which is recommended for reliability), the amount of material is multiplied by the number of layers. Usually for residential buildings or garages, where tightness is important, 2-3 layers are stele. The first layer can be made of cheaper material without sprinkling, and the upper one is made of expensive and durable.
| Type of work | Number of layers | Recommended overlap (see para. | Mastic consumption (kg/m2) |
|---|---|---|---|
| Repair of old coating | 1–2 | 10 | 1.0 – 1.5 |
| New roofing (garage) | 2–3 | 15 | 2.0 – 2.5 |
| Waterproofing of the foundation | 2 | 10 | 1.5 – 2.0 |
| Roof flat (industrial) | 3–5 | 20 | 3.0 – 4.0 |
When calculating, also take into account the margin for trimming in the areas adjacent to the walls and around the ventilation pipes. Endows And skates require additional reinforcement, so buy material with a margin of about 5-7% above the estimated volume.
Mastic preparation and surface priming
Mastic is the "glue" that keeps the ruberoid in place and ensures tightness of the joints. There are two main types: cold and hot. Cold mastic is ready for use immediately after mixing, but dries longer. Hot requires heating to a temperature of 150-200 degrees, which makes the work more dangerous, but provides instant and very strong grip.
To prepare hot mastics, you will need bitumen and filler (peat crumb, asbestos or cement). First, the boiler melts bitumen before the appearance of foam, then the filler is carefully added with constant stirring. It is important not to overheat the composition: if thick gray smoke goes, the process went wrong, and the mastic lost its properties.
A homemade mastic recipe
Mix 3 parts bitumen and 1 part waste oil for elasticity. Heat until the foam disappears, then add the filler. The cooled suit can be diluted with gasoline or kerosene to obtain a cold version.
Surface staining is a step that should not be missed. The primer penetrates into the micropores of concrete or plaster, binding dust and creating a monolithic base. Apply it with a wide brush or roller, paying special attention to the corners and joints. After applying the primer, you need to give time to dry, usually it takes 2 to 12 hours depending on the weather.
If you use a cold solvent-based mastic, make sure the room is well ventilated, as solvent vapors are flammable and toxic. Bitumen-polymer emulsions They are more safe and environmentally friendly, odorless and can be used in enclosed spaces, but are more expensive.
- 🧪 Stir the mastic carefully before each set of servings so that the settled heavy fractions do not remain at the bottom.
- 🌡️ Watch the temperature: cold suit can not be applied at a temperature below +5 ° C, it will become too viscous.
- 🔥 When working with hot mastics, always have sand or a fire extinguisher on hand in case of fire.
The technology of laying the first layer of ruberoid
Laying begins at the lowest point of the roof so that the draining water does not flow under the joints of the canvases. Roll the first roll across the slope (if the roof is pitched) or from one edge to the other (if flat) to check the accuracy of the dimensions and the levelness of the edge. Cut off the excess, leaving a small margin for overhang on vertical surfaces.
Apply a layer of mastic on the base with a width equal to the width of the roll plus 10-15 cm. Do not try to cover the entire roof at once, as the mastic quickly freezes or becomes covered with film. Work in sections of 1.5-2 meters. Carefully roll the ruberoid onto the prepared bed, pressing it with a heavy roller or just feet in soft shoes, moving from the center to the edges to expel the air.
The next canvas is laid with a swing on the previous one. The width of the overhang should be at least 10 cm for horizontal joints and 15 cm for end joints. The joint is further smeared with mastic and pressed tightly. If a floatable material is used, the lower layer of bitumen is melted by a burner until the characteristic shine appears.
☑️ Checklist of laying the first layer
Pay special attention to the places adjacent to the walls, pipes and parapets. Here the ruberoid must be raised to a vertical surface to a height of at least 20-30 cm. For this, often use additional strips that are glued first. The adjoining angle is desirable to make a galtel of cement mortar or a special plinth to avoid claws of the material.
⚠️ Note: When laying the first layer, do not allow the formation of folds and bubbles. The air left under the material will expand when heated by the sun and may tear the coating or peel it off.
Installation of the upper layers and finishing
The second and subsequent layers are laid only after the previous one has completely dried (if the cold method is used) or immediately (when melted). The main rule of multilayer roofing is the displacement of joints. The seams of the upper layer should in no case coincide with the seams of the lower layer. The optimal displacement is half the width of the roll or at least 50 cm.
For the upper layer, be sure to use the material with corn-sprinkled. It protects bitumen from the damaging effects of ultraviolet rays. If you use a regular ruberoid without sprinkling for the finish, its service life will be reduced by several times, as the bitumen will quickly dry and crack. In such cases, a layer of gravel can be applied on top of a hot mastic.
The technique of laying the upper layer is similar to the first, but requires more accuracy, since this is the front part of the roof. All joints should be thoroughly smeared and rolled. If you work with a fused material, make sure that bitumen protrudes from under the edge of the roll by 1-2 cm - this is a signal that the heating is sufficient and the gluing will be sealed.
Shifting seams in different layers is a prerequisite for a reliable roof. This prevents leakage even in the case of depressurization of one of the layers.
After laying all layers, it is necessary to check the quality of work. Walk across the surface, tapping it. A deaf sound indicates a good fit, and a ringing sound indicates the presence of voids. Such places should be carefully punctured, squeeze out air and pour through the syringe with asphalt mastic, then pressed.
Typical errors and operating tips
Even with the observance of technology, mistakes can be made that will negate all efforts. One of the most common is laying the material in wet weather or on a wet base. Water trapped under the ruberoid will turn into steam and inflate the roof. Also often forget about the qualitative cleaning of the base: the dust works as a separation layer, and after a year the coating can be rolled.
Another mistake is saving on mastic. Too thin a layer will not provide the desired adhesion, and the material will move away from the base at the first strong wind or temperature expansion. Conversely, too thick a layer of mastic can cause material to slide down the slope in hot weather.
- 🌧️ Do not work during or immediately after rain, even if the sun is shining.
- 🌬️ Avoid installation in windy weather, as the ruberoid sails and it is difficult to lay smoothly.
- ☀️ The best time to work is dry, warm weather without direct scorching rays (morning or evening).
Operation of ruberoid roof requires minimal maintenance, but it is necessary. In spring and autumn, it is recommended to clean the roof of leaves and debris, which can trap moisture. Once every 3-5 years, it is advisable to inspect the coating for cracks and, if necessary, smear them with bitumen varnish or mastic. Timely minor repairs extend the life of the roof by 5-7 years.
How do you remove the old coating?
If the old ruberoid cracked, but holds tight, it is not necessary to tear it. You can make a cement-sand screed over it and lay a new layer. If the material is swelled and peeled off, it will have to be dismantled completely.
Compliance with these simple rules and technologies will allow you to create a reliable protection for your building. Ruberoid is a material that forgives minor flaws, but requires respect for the basic principles of waterproofing. Properly placed, it will become a barrier that will stand between your possessions and the elements for decades.
Can I put a ruberoid on an old roof?
Yes, this is possible if the old coating has no bloating, rotting and firmly held on the base. The surface must be cleaned, dried and be sure to be soiled. However, if the base is destroyed, the old layer is better removed.
At what temperature can you lay a ruberoid?
The optimal air temperature is from +5 ° C to +25 ° C. At lower temperatures, the material becomes brittle, and the mastic dries poorly. Heating a frozen ruberoid with an open fire is dangerous.
How many layers of ruberoid do you need for a garage?
For the garage, it is recommended to lay at least 2 layers: one lining and one roofing with sprinkling. For flat roofs with active drainage, 3 layers are often made to guarantee.
How to replace the gas burner when laying?
If cold mastic is used, no burner is needed. If the material is fused, the burner can be replaced with a high-power building dryer, but this will significantly slow the process and can reduce the quality of warming up.