Roof repair with bitumen mastic: Review of work technology

Bitumen mastic proves to be a dependable ally in preserving the integrity of your roofing material. This adaptable substance is essential for sealing and mending a variety of roofing surfaces. Bitumen mastic provides a strong, long-lasting solution for any kind of small cracks, leaks, or areas where water seeps in.

Bitumen mastic, also known as roof mastic, is a kind of waterproofing sealant made of bitumen, which is a black, sticky, and extremely viscous liquid or semi-solid petroleum product. When combined with fillers like fine aggregates and fibers, it creates a viscous material that is perfect for covering flaws and gaps in roofs. Bitumen mastic’s superior waterproofing qualities are a result of this composition, which also makes it appropriate for larger-scale applications and minor repairs alike.

Using bitumen mastic to repair roofs is a simple yet very efficient use of technology. The first step is surface preparation, which involves thoroughly cleaning the roof area that has to be treated to get rid of any dust, debris, and loose materials. This step prolongs the life and efficacy of the repair by ensuring that the mastic adheres properly to the substrate.

Depending on the needs of the repair, the bitumen mastic is applied in different ways after it has been prepared. Using a trowel or putty knife, it can be applied directly to small cracks and joints, making sure the mastic fills the space entirely. Applying multiple layers and waiting for each to cure before applying the next may be required in cases of larger areas or more extensive damage.

Topic Roof repair with bitumen mastic: Review of work technology
Introduction Explaining the process and benefits of using bitumen mastic for repairing roofs.
Materials Needed List of materials required, such as bitumen mastic, primer, and tools like brushes and rollers.
Preparation Steps to prepare the roof surface, including cleaning and applying primer if necessary.
Application Techniques for applying bitumen mastic, ensuring even coverage and proper sealing of cracks.
Drying and Curing Information on the drying time and curing process, emphasizing the importance of allowing sufficient time.
Finishing Touches Final steps such as inspection for any missed spots and cleaning up.

Advantages of oil mastic

The most common type of bitumen mastic offers several significant benefits.

  • Resistance to almost any aggressive environments.
  • The possibility of tinting.
  • The simplicity of application, which any person can easily cope with.
  • Elasticity.
  • Sufficient viscosity, which makes such a mastic of universal.
  • Accessibility in price and efficiency.
  • Resistance to insolation.
  • Excellent waterproofing properties, due to which the repair of the roof is reliable and durable.
  • Durability.
  • Sunnyness. The presence of seams and joints is the biggest problem of any roof.
  • Special strength for gap, especially in bitumen mastics with rubber and rubber in the composition.
  • Stability and uniformity of application.
  • The possibility of repairing a roof of any shape and structure, even the most difficult.
  • Fire resistance. Bitumen mastic is able to withstand quite high temperatures.

The ability of bitumen mastic to be stretched and compressed without suffering any negative effects is also its most useful quality as a repair material. After all, the causes of each new crack in the roof cause it to widen, and standard repair materials lacking the required elasticity eventually break. Simultaneously, the bitumen mastic fully assumes and effectively handles the deformation load.

But purchase only high-quality mastic from reputable manufacturers to ensure that all these qualities are preserved. If not, it will be challenging to forecast the outcome, and any fresh leaks that occur while you are laying them again will have plenty of time to cause issues. Therefore, the most important thing is to make sure that the bitumen mastic you intend to use for roof repair is made in compliance with all GOST standards. This implies:

  1. Uniformity of the composition.
  2. Easy to apply to the repaired place.
  3. Heat resistance of at least 70 °.
  4. Lack of hazardous human health.
  5. Great adhesive ability.
  6. Water resistance and bio resistance.

Thus, Grid, Technonikol, and Rusmonolit are the most well-known domestic producers of bitumen mastics.The butyl-scientific "M-140 Polycles," bitumen-lakekh "Blam-20," chlorusulfolyethylene "Polykrov-l," and similar products like "Elamast," "Venta-U," "Gekopren," and "Blem-20-20" are the highest quality and most long-lasting.

In our thorough investigation of bitumen mastic roof repair, we delve into a useful synopsis of this adaptable technology. Bitumen mastic provides an enduring solution for a range of roofing problems, from small leak repairs to larger reinforcement projects. This article looks at bitumen mastic application step-by-step and emphasizes how well it seals cracks and increases roof durability. Whether you’re a professional roofer or a do-it-yourself enthusiast, knowing the right methods and best practices for applying bitumen mastic will guarantee effective repairs that extend the life of your roof.

What bitumen mastic is suitable for repair?

However, there is a wide range of bitumen mastics available in the contemporary construction market, each with a unique composition. Such kinds comprise the conditionally bitumen mastics used for roofing.

Mastic of cold use

This composition is homogeneous and ready for use right now. You can use it straight away, if you’d like, and dilute it with different solutions until the solution evaporates and the mastic returns to its original state.

When you need to fix a roof as quickly as possible, cold bitumen mastic is your best bet. Such mastic is also versatile and appropriate for nearly all coatings. However, she doesn’t require any setup work, including a gas burner or fire.

The most incredible thing is that cold mastic can be applied on a wet coating as well! This is the best option if you have to quickly stop a roof leak.

Keep in mind that certain kinds of cold mastics still require a small amount of heating—roughly 30 to 40 ° C.

Mastic of hot use

Do it yourself by using bitumen mastic, which is readily available from store shelves.

The temperature range for this mastic is 150–180 °C. Adhering to all safety regulations is crucial as this type of mastic should only be applied in hot form to repaired areas. However, the mastic will take on the required shape once it has cooled.

In actuality, cooking bitumen mastic is not difficult:

  • Step 1. We make a good bonfire.
  • Step 2. Put two ordinary bricks on the sides.
  • Step 3. We take any old bucket and put a piece of bitumen there.
  • Step 4. Stir carefully so as not to splash.
  • Step 5. In several layers we smear a crack or hole.

And bitumen mastic, which we cook from sawdust and dry sand, makes a great putty for fixing the roof. And if you follow these precautions, you can prepare a mastic on your own:

However, you can still create your own solvents, modifiers, and additives for ready-made bitumen mastic if you so choose. In order to prevent the mastic from running out while repairing an inclined roof, thickener should be added. Solvents should also be used if the mastic is too thick for the horizontal surface and "does not" push into a crack.

Water -based mastic

This kind of bitumen mastic is the most eco-friendly kind. Such mastic contains significantly fewer hazardous materials and is safer and easier to use.

Bitumen mastic with additives and fillers

In order to modify the properties of the most common bitumen mastic, plasticizers, minerals, and a range of binders are added. This is advantageous because you might require the following repairs for the same roof at different times:

  • A thick composition is enough to fill a hole;
  • liquid enough to isolate the edges of the sheets;
  • Particularly plastic to fasten the two halves of the cracked slate.

Thus, let’s examine each species independently; you will already be able to determine which at this point is necessary:

Rubber and polyurethane bitumen mastic

Elasticity records are held by bitumen mastic containing polyurethane and rubber. Their shield, which is created during the repair, can expand twenty times without breaking!

Bitumen-Latex mastic

Bitumen-lak is another relatively new variety of bitumen mastic. Its composition includes various synthetic binders and mineral fillers. Put simply, it’s latex and bitumen that have been enhanced with modifiers, asbestos, and mineral wool fibers. Is the standard bitumen mastic better? This type of repair mixture is stronger and more water resistant.

Bitumen mastic with oil solvent

However, the bitumen mastic in an oil solvent does not solidify in the slightest. However, it makes sense to limit its use to roofing components that are constantly vibrating. The truth is that bitumen mastic never forms a hard film, is plastic, and maintains its protective integrity under all circumstances.

Bitumen-resin mastic

And lastly, bitumen-resin mastic, which is highly well-known among the locals. Although it is actively used for auto repairs, this is a fantastic alternative for roof repairs. This kind of mastic is especially resilient to vibration, blows, and stretching. Most significantly, it sticks to any surface!

Now, let’s talk about what to do with all these mastics and how to fix various roofing flaws in them.

Repair of soft roof with bitumen mastic

The roll materials of the roof and bitumen tiles are subjected to particularly intense heating in the summer, especially in the heat. The roofing’s swelling is the main issue. Where? The truth is that any roofing carpet contains a more humid base that, when heated to 60 °C and under 2 t/m2 of pressure, releases water vapor. As a result, bitumen mastic flows, air and water bags form, and visible bubbles—sometimes as high as 30 cm—form!

For the most part, fixing a roof like this just requires sealing or replacing any damaged areas. There are two methods for applying bitumen mastics: mechanically or manually. Obviously, a brush and spatula work better for small roofing jobs, but a sprayer works better to restore the original roller coating.

Simple pitch on bitumen -based

Problem areas are cleaned, mastic-covered, and patched:

There are instances when aluminum tape is required to reinforce the patch:

Damage from water

If the material is already buried, we take the following action:

  • Step 1. Rotten material must be cut, and around the damage it needs to be removed by another 10 cm.
  • Step 2. Now the notch that was formed as a result of all this is thoroughly cleaned.
  • Step 3. We lubricate the repaired place with mastic and sealed with another layer of roller material so that the damage site is overlapped by 15 cm.

Lag behind the base and air

If the carpet canvas falls behind the base, it must be mastic-smeared on the base, the carpet canvas pressed again, and the patch glued on top to block the cut site by 10 cm.

Bloating areas manifest differently:

  • Step 1. We make a cross -shaped incision.
  • Step 2. We bend the canvases on four sides.
  • Step 3. Carefully clear the base.
  • Step 4. We dry the base, lubricate the bent canvases of the carpet with bitumen mastic, press to the base and glue it again.
  • Step 5. At this place we make a patch and restore the coating.

Big and small cracks

The roof needs bitumen repair because, despite being folded in three layers, it starts to collapse under the sun after eight years! Little cracks cover his entire surface, slowly but surely, and write vanishes if moisture seeps into them. However, you are capable of handling:

We do the following if you need to restore old roofing material that has tiny cracks from aging:

  • Step 1. Carefully clean the roofing material from dust and sprinkle. Use solar oil for convenience, which helps clean and makes rolled roller materials more elastic and durable. And remove the sprinkle easily with steel brushes or spatula.
  • Step 2. If necessary, in problem areas we make patches. Each patch should be more than the repair area by at least 10 cm on each side. Moreover, if you have to glue one patch on another, then block each next previous.
  • Step 3. Apply bitumen grease to the purified base – with brushes, spray, brushes or rags.
  • Step 4. If some patch is released, they need to be smoothed out. For example, press some kind of load.
  • Step 5. Extra mastic around the repair areas or along the edges of the roof is carefully removed by a spatula.
  • Step 6. We sprinkle all repaired places with heated sand, which in the future will protect mastic from sunlight and will not let it melt.

If the roll roof cracks are narrow, they are cut, the trash is taken out (trust me, it’s there), thoroughly dried with a construction hairdryer, and then hot mastic is applied using a Pacley. After that, they are leveled and, if preferred, patched. Concerning this technology:

Additionally, the "flash drive method" is employed for the most challenging cases:

Bitumen mastic roof repair is a useful and affordable way to deal with different kinds of roofing problems. This adaptable material is great for repairing small cracks, leaks, and worn-out areas, and it also helps to prolong the life of your roof. It works well on sloped and level roofs due to its versatility and ease of application on various surfaces.

The longevity of bitumen mastic is one of its main benefits. It creates a strong, waterproof layer that protects your roof from the weather once it is applied. This shield improves the roof structure’s overall resistance to weathering and corrosion in addition to preventing water intrusion.

One more advantage is that the process of repair is very easy. Both experts and do-it-yourselfers can apply bitumen mastic quickly and effectively. Because of its flexibility, it can adapt to the roof’s natural movements without chipping or losing adherence, guaranteeing long-lasting results.

In conclusion, bitumen mastic offers the advantages of both affordability and efficacy when used for roof repair. Homeowners can steer clear of future, more expensive and extensive repairs by taking quick care of minor issues. This adaptable material, which provides comfort and weather protection, is still the material of choice for preserving and improving the integrity of many kinds of roofs.

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Alexandra Fedorova

Journalist, author of articles on construction and repair. I will help you understand the complex issues related to the choice and installation of the roof.

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