Unused flat roof - Underground concrete, sealed with bitumen, freely weathered

Top / Bottom sheet of the seal
GLAPOR flex hot bitumen
GLAPOR cellular glass boards
GLAPOR felx hot bitumen
Primer for bitumen
Concrete slab

Description of the application

The GLAPOR flat roof is a compact and under flow secured bonded flat roof construction.

The thermal insulation is installed free of thermal bridges using GLAPOR flex hot bitumen or GLAPOR k-2k cold adhesive on the entire substructure.

The sealing system is conform to the legal regulations and standards for respective intended use.

The minimum roof pitch of the flat roof constrcution of 2.0% should be kept. The GLAPOR gradient system has different slopes available.

To avoid concentrated drainage GLAPOR roof riders are available in different versions.

Advantages of the GLAPOR flat roof systems:

Quality: Cellular glass products manufactured with proprietary technology and professional quality control.

Service: Expert advice from planners, structural engineers, construction experts and contractors.

Efficiency: Very long service life of the system constructions with minimum maintenance.

Sustainability: Made from 100% recycled glass, we guarantee consistent material properties over the entire usage time.

Safety: GLAPOR cellular glass insulaion panels are diffusion-tight. When installed with closed joints, a vapor barrier is not required.

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Planning notes / Execution notes

A vapor barrier is not required when using GLAPOR cellular glass insulation because GLAPOR cellular glass boards are vapor-tight.

The underground should be level, gem. DIN 18 202, designed to be load bearing and dry and free from residues (oil, grease, etc).

10 kN / m² can be assumed without proof for the wind resistance of fully glued roof systems with GLAPOR foam glass and GLAPOR flex hot bitumen.

Fire protection “Hard roofing” according to DIN 4102-7 – Cellular glass panels belong to building material class A1. The thermal insulation is not flammable. For the component “roof”, the state building regulations require, in addition to the classification in a building material class (A1) usually a so-called “hard roofing”. This is to ensure that the roof structures are resistant to spreading fire and radiant heat. For the manufacturers of waterproofing systems, these tests with the different seals are available.

The thickness of the cellular glass insulation comply with the lawful and object-specific requirements of the heat transmission (U-value of the element). Please check our data sheets.

The minimum thickness of the thermal insulation is 40mm. Tapered insulation systems starts by a thickness of 30mm. With a multi-ply shift were the insulations boards stick together among each other with GLAPOR flex hot bitumen. The use of the bonding with the insulations boards among each other is ca 2-3 kg GLAPOR flex hot bitumen.

The use of the bonding with the insulations boards on the underground is conditional on his evenness and is ca. 5-8 kg GLAPOR flex hot bitumen. The overlaying of ridges and throats were processed by emery boards by the shift of the tapered insulation systems.

The minimum roof pitch of 2% should be aspire. Roof pitches under 2% are special construction and need a special shift of tightening lanes.

The processing temperature of the bitumen is ca. 150-180°C.

The flat roof rules and regulations of the tightening lane producers are important for the shift of tightening lanes. If you use a rich polymer single-layer tightening, you need a hot bitumen drain at the GLAPOR cellular glass boards. The use is ca. 2,0 kg/m² roof area.

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Installations instructions

Coat the clean roof surface with bitumen primer / bitumen emulsion and allow free drying in air.
Consumption: approx. 0.3 kg / m²

Install GLAPOR cellular glass panels in mitre.
Pour GLAPOR flex hot bitumen.

Dip the insulation boards with two sides into the adhesive and insert diagonally so that the longitudinal and transverse joints are filled with bitumen.

For a short time, secure the insulation board against movement.
Depending on the evennes of the ground.
Consumption: 5 to 8 kg / m²

Pour GLAPOR flex hot bitumen and spread with a rubber spatula on the cellular glass surface.
Top coat with GLAPOR flex hot bitumen.
Consumption approx. 2.0 kg / m²

Variant with a high polymer seal.
Please note the instructions of the manufacturer.
Other sealing systems on request.