SBS modified sheets

Asphalt sheets modified with SBS (styrene-butadiene-styrene) are characterized by their high elasticity and elongation capacity. This allows them to adapt to structural movements and withstand deformations without breaking, which is essential for areas with severe climatic conditions and structures with possible settlements.

This type of sheet has good resistance to low temperatures and aging, maintaining its mechanical properties for long periods. Its application is common on sloping roofs and terraces with moderate traffic.

Sheets modified with APP

Sheets with modified bitumen APP (atactic polypropylene) stand out for their thermal resistance and stability against ultraviolet radiation, which makes them suitable for applications directly exposed to the elements without the need for additional protection.

These membranes have less elasticity than SBS, but have greater rigidity and hardness, which makes them a suitable option for flat roofs and waterproofing systems in areas with high sun exposure.

Self-adhesive and torch-applied sheets

Self-adhesive sheets incorporate a layer of adhesive on one side protected by a removable film, which facilitates installation without the need to use flame or additional adhesives. They are widely used for repairs or small surfaces where speed and cleanliness are required in the application.

On the other hand, torch-applied sheets require the application of heat using a flame to melt the bitumen and adhere the membrane to the support. This method provides excellent adhesion and continuity in waterproofing, being the most widespread in large projects.

Sheets with mineral and metallic finish

The surface finish of the sheets can be mineral, with stone or sand granules, which protect the membrane from abrasion, UV rays and mechanical wear. This type of finish is ideal for exposed decks that require additional protection and better aesthetics.

Sheets with a metallic finish, generally made of aluminum, offer high thermal reflectivity that contributes to the energy efficiency of the building by reducing the surface temperature and interior heating. They also provide resistance to chemical agents and aging.

Waterproofing of roofs and terraces

The most widespread use of waterproofing asphalt sheets is in the protection of flat or inclined roofs, and passable or non-passable terraces. Its main function is to prevent water infiltration that could cause structural damage, humidity or deterioration of interior finishes.

The membrane is installed forming a continuous barrier that withstands weather conditions and pedestrian traffic, guaranteeing the durability of the system. In addition, it can be combined with thermal insulation to improve comfort and energy efficiency.

On pitched roofs, the sheets act as a waterproof support under finishing materials such as tiles or gravel, prolonging the useful life of the roof.

Protection of walls and foundations

Asphalt sheets are also used in the waterproofing of buried walls, basements and foundations to prevent the entry of moisture from the ground. This application is essential to avoid deterioration of the structure and the appearance of problems such as efflorescence, mold and corrosion.

Installation on walls requires correct surface preparation and mechanical protection to avoid damage due to ground movements or impact of tools during work.

In foundations, the membranes are placed before the concrete is poured or between layers of mortar, guaranteeing permanent watertightness.

Waterproofing in infrastructure and civil works

Asphalt sheets are widely used in civil works such as tunnels, bridges, dams and canals, where waterproofing is critical for the safety and durability of the infrastructure. Their resistance to water pressure and adaptability to complex shapes make them an effective solution.

In hydraulic infrastructures, these membranes prevent leaks that could compromise the stability and operation of the construction elements.

Additionally, on roads and pavements, they can be used to protect underlying structures and prevent the passage of water to lower layers.

Special uses in garden and inverted roofs

In garden roofs, asphalt sheets are part of the waterproofing system that protects the structure from the weight and constant humidity of the plant substrate. They must have high mechanical and chemical resistance to withstand roots and biological agents.

Inverted roofs incorporate the waterproofing membrane under the thermal insulation, so the sheets must resist specific conditions of temperature and humidity, in addition to facilitating the evacuation of water.

These applications require products with technical characteristics adapted to guarantee long-term tightness in particular conditions.

Support preparation

The correct installation of asphalt sheets begins with the proper preparation of the support, which must be clean, dry, flat and free of sharp elements or particles that could damage the membrane. It is recommended to repair cracks, level irregularities and apply primers to improve adhesion.

On porous or highly absorbent surfaces, the asphalt primer creates a homogeneous base that prevents detachment or bubbles during the application of the sheet.

Adequate preparation guarantees optimal anchoring and prolongs the useful life of the waterproofing.

Sheet placement methods

The sheets can be installed using different techniques, depending on the type of product and the need of the project. The torch-applied method consists of melting the bitumen with a flame to adhere the membrane to the support or another lower layer, forming a continuous and resistant seal.

The self-adhesive system allows for a faster and cleaner installation, since the sheet incorporates a layer of adhesive that is activated when the protective film is removed, adhering directly to the support.

There are also mechanical systems that fix the sheets using anchors or staples, used in specific cases where it is not possible to apply heat or adhesives.

Construction details and overlaps

A crucial aspect in the installation is the treatment of the overlaps between sheets, which must guarantee waterproof continuity. Horizontal and vertical overlaps must be wide enough and properly sealed by heat or adhesive to prevent leaks.

In encounters with construction elements such as downspouts, chimneys or parapets, complementary accessories and specific techniques are used to ensure watertightness and avoid weak points.

Correct construction detail is essential for the success of the waterproofing system and the prevention of future damage.

Maintenance and repair

Asphalt sheets require periodic maintenance to detect and repair possible damage caused by impacts, aging or structural movements. Regular visual inspections allow you to identify areas with cracks, bubbles or detachments.

Repairs are usually carried out by applying patches with sheets of the same type, ensuring an airtight seal. In case of extensive damage, complete replacement of the membrane may be necessary.

Proper maintenance prolongs useful life and reduces long-term rehabilitation costs.

Advantages of asphalt sheets

One of the main advantages of asphalt sheets is their high waterproofing efficiency, which guarantees a continuous barrier against water and humidity. Its flexibility and mechanical resistance allow it to adapt to different surfaces and resist movements without losing tightness.

In addition, they have good durability against climatic and chemical agents, and their installation, especially with torch-applied or self-adhesive systems, is relatively quick and safe. They are compatible with multiple types of support and construction systems.

Their versatility makes them a widely used solution in different sectors, from homes to complex infrastructures.

Limitations and considerations

Among the limitations is the need for correct installation to guarantee its operation, since errors in placement can cause premature failures. Flame application requires specialized personnel and precautions to avoid fire risks.

Additionally, asphalt sheets can be susceptible to mechanical damage due to impact or perforation, so they must be adequately protected in areas with heavy traffic or aggressive conditions.

In some cases, its weight and rigidity may be factors to consider in sensitive structures, and the presence of bitumen limits its use in very specific applications where hydrocarbon-free membranes are required.

Applicable technical standards

Waterproofing asphalt sheets must comply with specific regulations that regulate their manufacturing, characteristics and performance. Among the most relevant is the UNE-EN 13707 standard, which defines the requirements for modified bituminous membranes for waterproofing.

There are also national regulations and technical construction codes that establish criteria on the design, installation and quality control of these products, ensuring their proper function in the building.

Compliance with these standards guarantees the safety, durability and efficiency of waterproofing systems made with asphalt sheets.

Certifications and quality tests

Manufacturers subject their products to laboratory tests that measure properties such as tensile strength, elongation, adhesion, impermeability and resistance to aging. These tests allow us to obtain certifications that guarantee the quality and suitability of the material for its intended use.

Official certifications facilitate the objective selection of the appropriate product and provide confidence to designers, installers and end users about the expected performance.

In addition, there are quality seals and internationally recognized brands that distinguish products that meet high technical and environmental standards.

SBS modified sheets

Asphalt sheets modified with SBS (styrene-butadiene-styrene) are characterized by their high elasticity and elongation capacity. This allows them to adapt to structural movements and withstand deformations without breaking, which is essential for areas with severe climatic conditions and structures with possible settlements.

This type of sheet has good resistance to low temperatures and aging, maintaining its mechanical properties for long periods. Its application is common on sloping roofs and terraces with moderate traffic.

Sheets modified with APP

Sheets with modified bitumen APP (atactic polypropylene) stand out for their thermal resistance and stability against ultraviolet radiation, which makes them suitable for applications directly exposed to the elements without the need for additional protection.

These membranes have less elasticity than SBS, but have greater rigidity and hardness, which makes them a suitable option for flat roofs and waterproofing systems in areas with high sun exposure.

Self-adhesive and torch-applied sheets

Self-adhesive sheets incorporate a layer of adhesive on one side protected by a removable film, which facilitates installation without the need to use flame or additional adhesives. They are widely used for repairs or small surfaces where speed and cleanliness are required in the application.

On the other hand, torch-applied sheets require the application of heat using a flame to melt the bitumen and adhere the membrane to the support. This method provides excellent adhesion and continuity in waterproofing, being the most widespread in large projects.

Sheets with mineral and metallic finish

The surface finish of the sheets can be mineral, with stone or sand granules, which protect the membrane from abrasion, UV rays and mechanical wear. This type of finish is ideal for exposed decks that require additional protection and better aesthetics.

Sheets with a metallic finish, generally made of aluminum, offer high thermal reflectivity that contributes to the energy efficiency of the building by reducing the surface temperature and interior heating. They also provide resistance to chemical agents and aging.

Waterproofing of roofs and terraces

The most widespread use of waterproofing asphalt sheets is in the protection of flat or inclined roofs, and passable or non-passable terraces. Its main function is to prevent water infiltration that could cause structural damage, humidity or deterioration of interior finishes.

The membrane is installed forming a continuous barrier that withstands weather conditions and pedestrian traffic, guaranteeing the durability of the system. In addition, it can be combined with thermal insulation to improve comfort and energy efficiency.

On pitched roofs, the sheets act as a waterproof support under finishing materials such as tiles or gravel, prolonging the useful life of the roof.

Protection of walls and foundations

Asphalt sheets are also used in the waterproofing of buried walls, basements and foundations to prevent the entry of moisture from the ground. This application is essential to avoid deterioration of the structure and the appearance of problems such as efflorescence, mold and corrosion.

Installation on walls requires correct surface preparation and mechanical protection to avoid damage due to ground movements or impact of tools during work.

In foundations, the membranes are placed before the concrete is poured or between layers of mortar, guaranteeing permanent watertightness.

Waterproofing in infrastructure and civil works

Asphalt sheets are widely used in civil works such as tunnels, bridges, dams and canals, where waterproofing is critical for the safety and durability of the infrastructure. Their resistance to water pressure and adaptability to complex shapes make them an effective solution.

In hydraulic infrastructures, these membranes prevent leaks that could compromise the stability and operation of the construction elements.

Additionally, on roads and pavements, they can be used to protect underlying structures and prevent the passage of water to lower layers.

Special uses in garden and inverted roofs

In garden roofs, asphalt sheets are part of the waterproofing system that protects the structure from the weight and constant humidity of the plant substrate. They must have high mechanical and chemical resistance to withstand roots and biological agents.

Inverted roofs incorporate the waterproofing membrane under the thermal insulation, so the sheets must resist specific conditions of temperature and humidity, in addition to facilitating the evacuation of water.

These applications require products with technical characteristics adapted to guarantee long-term tightness in particular conditions.

Support preparation

The correct installation of asphalt sheets begins with the proper preparation of the support, which must be clean, dry, flat and free of sharp elements or particles that could damage the membrane. It is recommended to repair cracks, level irregularities and apply primers to improve adhesion.

On porous or highly absorbent surfaces, the asphalt primer creates a homogeneous base that prevents detachment or bubbles during the application of the sheet.

Adequate preparation guarantees optimal anchoring and prolongs the useful life of the waterproofing.

Sheet placement methods

The sheets can be installed using different techniques, depending on the type of product and the need of the project. The torch-applied method consists of melting the bitumen with a flame to adhere the membrane to the support or another lower layer, forming a continuous and resistant seal.

The self-adhesive system allows for a faster and cleaner installation, since the sheet incorporates a layer of adhesive that is activated when the protective film is removed, adhering directly to the support.

There are also mechanical systems that fix the sheets using anchors or staples, used in specific cases where it is not possible to apply heat or adhesives.

Construction details and overlaps

A crucial aspect in the installation is the treatment of the overlaps between sheets, which must guarantee waterproof continuity. Horizontal and vertical overlaps must be wide enough and properly sealed by heat or adhesive to prevent leaks.

In encounters with construction elements such as downspouts, chimneys or parapets, complementary accessories and specific techniques are used to ensure watertightness and avoid weak points.

Correct construction detail is essential for the success of the waterproofing system and the prevention of future damage.

Maintenance and repair

Asphalt sheets require periodic maintenance to detect and repair possible damage caused by impacts, aging or structural movements. Regular visual inspections allow you to identify areas with cracks, bubbles or detachments.

Repairs are usually carried out by applying patches with sheets of the same type, ensuring an airtight seal. In case of extensive damage, complete replacement of the membrane may be necessary.

Proper maintenance prolongs useful life and reduces long-term rehabilitation costs.

Advantages of asphalt sheets

One of the main advantages of asphalt sheets is their high waterproofing efficiency, which guarantees a continuous barrier against water and humidity. Its flexibility and mechanical resistance allow it to adapt to different surfaces and resist movements without losing tightness.

In addition, they have good durability against climatic and chemical agents, and their installation, especially with torch-applied or self-adhesive systems, is relatively quick and safe. They are compatible with multiple types of support and construction systems.

Their versatility makes them a widely used solution in different sectors, from homes to complex infrastructures.

Limitations and considerations

Among the limitations is the need for correct installation to guarantee its operation, since errors in placement can cause premature failures. Flame application requires specialized personnel and precautions to avoid fire risks.

Additionally, asphalt sheets can be susceptible to mechanical damage due to impact or perforation, so they must be adequately protected in areas with heavy traffic or aggressive conditions.

In some cases, its weight and rigidity may be factors to consider in sensitive structures, and the presence of bitumen limits its use in very specific applications where hydrocarbon-free membranes are required.

Applicable technical standards

Waterproofing asphalt sheets must comply with specific regulations that regulate their manufacturing, characteristics and performance. Among the most relevant is the UNE-EN 13707 standard, which defines the requirements for modified bituminous membranes for waterproofing.

There are also national regulations and technical construction codes that establish criteria on the design, installation and quality control of these products, ensuring their proper function in the building.

Compliance with these standards guarantees the safety, durability and efficiency of waterproofing systems made with asphalt sheets.

Certifications and quality tests

Manufacturers subject their products to laboratory tests that measure properties such as tensile strength, elongation, adhesion, impermeability and resistance to aging. These tests allow us to obtain certifications that guarantee the quality and suitability of the material for its intended use.

Official certifications facilitate the objective selection of the appropriate product and provide confidence to designers, installers and end users about the expected performance.

In addition, there are quality seals and internationally recognized brands that distinguish products that meet high technical and environmental standards.