Flat roof penetrations from LORO made of hot-dip galvanized steel, or solid stainless steel, have proven to be sustainable and safe penetrations for drain pipes, ventilation pipes and cables. Over the decades, new solutions have been developed to suit almost every flat roof construction:

- LOROFLEX with sliding flange for pushing through the pipe
- DRAINLET with socket chamber for inserting the pipe

Stack Ventilation

The challenge with stack ventilation and flat roof penetration lies in secure and permanent sealing. This requires consideration of the permanent effects of weather and the loads from the roof structure itself - especially with utilized roofs or green roofs.

The high-quality and sustainable materials steel and stainless steel are ideal due to their high resistance to external influences.

For photovoltaic and solar systems, LORO offers safe flat roof penetrations from DN 70 to DN 150. For new buildings and for retrofitting PV systems with subsequent cable penetration through flat roofs.

The flexible LORO-X socket and the wide range of fittings offers maximum freedom on the roof for cable routing. From the roof penetration to the PV modules with weather and UV resistant LORO-X steel drainage pipes.

When pipe penetrations through walls and ceilings inside the building are required, special demands are often placed on fire protection. LORO offers pipe penetrations approved by general building authority approval (AbZ) made of insulated composite pipes, which can be easily implemented according to the practical installation instructions of the AbZ.

Penetrations through the external walls of the building above ground level do not present a major problem. However, if the penetration leads from the basement to the outside, the pipe penetration is also sealed against pressurized water. Pressure-resistant and backflow-proof LORO-X steel drainage pipes can be easily routed from the building in the gravel bed, or with the usual protective coatings according to standards, also in the adjacent soil.

The name LOROFLEX illustrates the advantage of the pipe penetration based on one sliding flange (cold roof) or two sliding flanges (warm roof), through which the LORO-X composite pipe can be "flexibly" pushed through.

As an insulated flat roof penetration for rainwater drainage or for ventilation pipes, the universal clamping flange of the LOROFLEX sliding flanges offers secure sealing for waterproofing membranes and vapor barriers made of bitumen or plastic.

Go directly to LOROFLEX flat roof penetration.

LORO offers special pipe penetrations with puddle flange for watertight concrete. Especially when concreting on site, penetrations with puddle flange provide increased safety, as there is usually no additional waterproofing layer with watertight concrete and any seeping water is stopped by the circumferential puddle flange.

The LORO-X socket can protrude from the concrete or be cast flush. Special socket protective caps prevent liquid concrete from entering the pipe penetration during the construction phase when installed flush.

With Thermal Insulation

The new roof and wall penetration with integrated thermal insulation for roofs made of watertight concrete offers a factory-applied insulation layer, so that cold water (in flat roof drainage) or cold air (in ventilation) is kept in the media-carrying inner pipe.

Following the proven principle of LORO-X composite pipes, the space between the media-carrying inner pipe and the outer pipe equipped with puddle flange is filled with an insulating layer of 2K-PU foam at the factory.

Find more products in the product finder at LORO-X pipe penetrations.

The versatile pipe penetration based on the proven LORO-X DRAINLET flat roof drains offers special possibilities for code-compliant pipe penetrations with small distance to the wall and to rising building elements.

With the specially designed top elements with lateral upstand as installation aid, installation directly at the rising wall is possible. As known from parapet drains, without having to maintain the otherwise usual distance of 30 cm for water-bearing layers.

The special LORO-X ventilation pipes made of stainless steel with tapered spigot end fit optimally into the flange of the DRAINLET pipe penetration, so that gases and odors can be transferred to the wind at least 1/2 meter above the waterproofing level.

The optional use of a rain hood is no longer required for the venting and ventilation of wastewater pipes according to current standards, as "raining in" into the wastewater downpipe is accepted in favor of optimal ventilation with full cross-section.

Product finder: DRAINLET pipe penetrations.

Non-cross-ventilated double-shell roofs, in which the air space between the two shells must be connected to the outside air through sufficiently dimensioned intake and exhaust openings, require special vents that simultaneously prevent water ingress. Specifically for these double-shell roofs with insulation and air layer in between, the LORO vent for mounting is used. It ensures the airflow through the roof structure.

The LORO-X roof vent consists of an "inverted", i.e. downward-pointing, long socket with circumferentially attached connection edge for connecting the waterproofing.

At the upper end of the roof vent, ventilation openings are circumferentially incorporated that allow lateral ventilation. As protection against rain, a domed hood covers the pipe and thus ensures the airflow through the roof structure.