LAMILUX Rooflight Dome F100: The technical details

Design Engineering

Frame profile with patented glass-fiber reinforcement

A special, partial long-fiber reinforcement in the upper and lower profile area provides high stability. Heavy exposure to wind suction forces only results in a slight deformation in the profile frame. This ensures the whole upper section of the rooflight dome remains firmly attached to the upstand. Since the partially incorporated fiber reinforcement absorbs any tensile stress, the profile is extremely resistant to bending. The frame profile satisfies DIN 18234-4.

Glazing bead

A profiled, composite glazing bead provides a force-fitted and form-fitted load transfer element. Safety snap arms and a surrounding, functional groove ensure fitting components can be easily attached.

Multi-layered, double seal system

Both the frame profile and the glazing bead feature coextruded sealing lips which join to the upstand’s upper installation surface. The inside seals overlap in a T-shape in the corner joints, thus forming four separate air spaces. These ensure the entire system is free of thermal bridges and provide for optimum energy efficiency.

The double seal system also helps to provide reliable protection against driving rain and improved acoustic insulation.

Appearance and design

Functionality and design clearly belong together at LAMILUX: the border frame’s characteristic appearance is the result of a prominent stepped seam, a bi-convex, curved, external contour and finished welded joints. The result is optimized water drainage (assisted by the coextruded, laminated lip) and effective self-cleaning properties, as well as a high resistance to bending of the frame.

GRP upstand: Stability and thermal insulation in many variants

The upstand forms the base for the structure. It provides a thermally optimum connection to the building structure. Manufactured by LAMILUX from fiber-reinforced composite, our upstands are CFC-free, solid white in color and thermally insulated with polyurethane hard foam. They feature a weatherproof sealing system and are classified as components which melt and drip without burning. LAMILUX upstands feature a closed box section – this makes them very stable and warp-resistant. A variety of metal inserts can be directly laminated into them. Secure anchorage for fittings and personal protective equipment (PPE) is guaranteed.

LAMILUX upstands can be produced in a great many variants with respect to height and inclination angle. They also offer many possibilities to individually realize roof connections. Example: thermally-insulated base flange – variable insulation thicknesses also available on request.

Energy efficiency

Optimum Ur values are ensured by the energy-relevant interplay throughout the structure between individual system components, such as glazing, the border frame, the seal system, and upstand. Crucial factors in this respect are the choice of materials, component geometry, the overall structure design and insulation.

Isothermal lines are lines featuring the same temperature and reveal a measurable customer benefit. The 10.0° isothermal line is a fixed measured variable used in building physics (red line in the diagram). If this line goes off a structure, condensate or even hoar frost will form precisely at this point. In contrast, optimum, flawless distribution of the 10.0° isothermal line leads to a noticeable reduction in the risk of condensation on the interior of the overall structure when temperatures are low outside. The 10.0° isothermal line must be calculated in accordance with specified framework conditions.

Optimized isothermal characteristics for consistent heat insulation zones without any weak spots provide superior heat protection in all sections throughout the structure. LAMILUX calls this thermal bridge-free product concept TIP: Total Insulated Product.