The use of prefabricated slope insulation has proven its worth. These are made to measure by the manufacturer in coordination with the planner and the craftsman carrying out the work. With this method, almost any slope situation can be realized. This makes it very easy to produce sloping flat roofs, and slope and thermal insulation are applied in a single operation.
Note: A combination of basic insulation and slope insulation above it is also possible and depends mainly on the insulation thickness.
Image: Slope insulation schematic - baukobox
The roof pitch of unused roof surfaces (with or without greenery) is usually between 2% and 5%. This can result in significant height differences in the substructure, especially in the case of larger roof areas, which can be created, for example, by slope insulation and which must be taken into account, for example, when connecting to rising components or in the area of patio doors. Roof pitches of less than 2% are possible under certain conditions (see also application categories according to DIN 18531). For roof pitches above 5%, additional measures are required to prevent the roof structure from slipping.
using slope insulation, care is important, especially in the planning phase, as this is the only way to avoid moisture damage caused by standing water. Since slope slabs are individually prefabricated, an individual installation plan must be drawn up during the planning phase, which includes the heights of the insulation at high and low points as well as the location of the drainage points. The laying plan then becomes the basis for the production of the insulation boards.
Slope insulation boards are usually ordered by the fabricator after exact measurements. In the meantime, the roof has not been completely sealed. Only the vapour barrier is an emergency seal. This must therefore be processed very carefully and the time span should be kept as short as possible and divided according to the weather conditions.
On the construction site, the panels should be stored in a dry place away from direct sunlight. Before the craftsmen start laying, it must be ensured that the flat roof is dry and flat. Following the laying of the slope insulation panels, the roof waterproofing must be applied immediately.
Note: DIN 4108-1 (Thermal insulation in building construction; Sizes and Units) has been withdrawn and replaced by DIN EN ISO 7345.
DIN 4108 Supplement 2, Thermal insulation and energy saving in buildings - Thermal bridges - Examples of planning and execution DIN
4108-2, Thermal insulation and energy saving in buildings - Part 2: Minimum requirements for thermal insulation
DIN 4108-10, Thermal insulation and energy saving in buildings - Part 10: Application-related requirements for thermal insulation materials - Factory produced Thermal insulation materials
DIN 4109, sound insulation in building construction; Requirements and verifications
DIN EN 826, Thermal insulation products for the building industry - Determination of behaviour under compressive stress
DIN EN 13162, Thermal insulation products for buildings — Factory-made products made of mineral wool (MW) — Specification
DIN EN 13163, Thermal insulation products for buildings — Factory-made products made of expanded polystyrene (EPS) — Specification
DIN EN 13164, Thermal insulation products for buildings — Factory-made products as extruded polystyrene foam (XPS) — Specification
DIN EN 13165, Thermal insulation products for buildings — Factory-made rigid polyurethane foam (PU) products — Specification
DIN EN 13167, Thermal insulation products for buildings — Factory-made products made of foam glass (CG) — Specification –
DIN EN ISO 7345, Thermal Insulation - Physical Quantities and Definitions
Flat Roof Directive (Technical Rule for Waterproofing), Rule for Waterproofing of Unused Roofs, Rule for Waterproofing of Used Roofs and Surfaces
EnEV Energy Saving Ordinance for Buildings, Ordinance on Energy-Saving Thermal Insulation and Energy-Saving System Technology for Buildings
►Handling of mineral wool insulation materials (glass wool, rock wool), instructions for action of the German Employers' Liability Insurance Association for the Construction Industry – BG BAU
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