DE3033089A1 - INSULATION INCLINED ROOF - Google Patents

Abstract

1. Insulation of pitched roofs against sound and heat, consisting of roof girders, insulating layers (1, 3) with an incorporated impermeable layer (2), a roof support and a roof skin, characterized in that the impermeable layer (2) arranged between two insulating layers (1, 3) has a water vapour diffusion resistance index of < 1,000 and in that - in the direction of the temeprature and/or humidity gradient as viewed from the inside to the outside - the outer insulating layer (3) is thicker.

Description

Reinhold & Mania GmbH 6800 Mannheim 1

Augusta plant

Kr-by-c

¹ 2. Sea 1980

Insulation of sloping roofs

The invention relates to the insulation of pitched roofs against noise and heat, consisting of roof girders, Insulation element, roof skin support and roof skin.

For economic reasons, more and more lightweight constructions are being used used, which mostly insulates because of the high environmental pollution and energy shortage Need to become. This is especially true for pitched roofs if the floor space is intended for people to stay is.

So-called runways are known, which are made of an aluminum foil extending between the rafters consist, which in turn outside the fastening area with a pad made of mineral wool is provided.

These runways have the disadvantage that the good thermal insulation between the rafters is mostly for the rafter area no longer applies. In addition, the sound is hardly retained, which means that the underlying rooms lose their living quality.

RM 449

Furthermore, a sandwich panel is mainly known for a floor installation, in which a reflective film, For example, made of aluminum-vaporized polyethylene or aluminum foil, arranged between two insulation panels is.

The reflection of heat or cold is stated as an advantage. It is obvious that the one described reflective film does not let water vapor through. Became such a sandwich panel in one If a pitched roof is built in, water damage to the construction and a reduction in the result would result the thermal insulation effect can certainly not be completely avoided.

The invention is based on the object of an insulating element to find one that sufficiently insulates the airborne noise and at the same time allows full use maintains the insulation properties of the fabrics in all conspicuous weather conditions.

The object is achieved according to the invention in that As an insulating element, two layers of insulation are arranged on top of each other, with a barrier layer a diffusion resistance «£ 1OOO are separated, with the insulation layer corresponding to the existing temperature gradient and increasing relative humidity is made thicker in the colder area.

For the person skilled in the art it is surprising that with the installation of such an element with internal Block the sound can be reduced by almost 10 dB without the thermal insulation suffering.

RM 449 f I.

A harmful condensation in the temperature and humidity gradients occurring in our climate in residential houses does not occur if the thickness of the outer Layer is correspondingly larger. In contrast, the water vapor is hardly affected by the low diffusion resistance prevented from migrating through the insulation element, so that too no moisture penetration of the insulation material occurs.

In a particular embodiment, at an internal temperature of 2O ⁰ C and 50% relative humidity and an external temperature of -10 ⁰ C and 80% relative humidity and an inner insulating layer of mineral fiber of up to a maximum thickness of 15 cm, the outer Mineral fiber insulation layer at least 1 cm thicker.

The arrangement of a barrier layer, e.g. made of blocked polyisocyanate film, between two layers of mineral fiber has the advantage that the insulating element also has a high protective function despite the inlay of plastic against fire.

In a further embodiment, at an internal temperature of 20 ⁰ C and 50% relative humidity and an external temperature of -10 ⁰ C and 80% relative humidity and an inner insulating layer of polyurethane foam with diffusion factor μ = 80 up to a maximum thickness of 15 cm, the outer polyurethane insulation layer is at least 6 cm thick.

RM 449

When using polyurethane, which can also be open-pored, no moisture occurs under the above conditions off, so that the low thermal conductivity of the polyurethane can be used to the full.

Of course, all known insulation materials / including polystyrene, fiberglass, rock wool, etc., are used, whereby the gluing of the layers of an insulating element can be done with each other in the factory. This significantly simplifies assembly.

An exemplary embodiment is shown in the drawing and is described in more detail below. It demonstrate:

Fig. 1 section through the insulating element.

in Fig. 1 there is a barrier layer on a lower insulation layer 2 made of polyisocyanate, which in turn is covered by a somewhat thicker upper insulating layer 3 is.

RM 449

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Claims (3)

Claims MT) insulation of pitched roofs against noise and heat, consisting of roof support, insulation element, roof skin support and roof skin, characterized in that As an insulating element, two insulating layers (1,3) are arranged one above the other, which are covered by a barrier layer (2) are separated with a diffusion resistance <1000. Moisture gradient from inside to outside the outer layer must be thicker. 2. Insulation according to claim 1, characterized in that at an internal temperature of 20 ⁰ C or 50% relative humidity as well as an outdoor * temperature of -10 ⁰ C or 80% relative air moisture and an inner insulation layer (1) * made of mineral fiber up to a maximum thickness of 15 cm, the outer insulation layer (3) made of mineral fiber is at least 1 cm thick. 3. Insulation according to claim 1, characterized in that at an internal temperature of 20 ⁰ C or 50% relative humidity and an outside temperature of -1O ⁰ C or 80% relative humidity and an inner insulating layer (1) made of polyurethane foam with a diffusion factor μ = 80 up to a maximum thickness of 15 cm, the outer insulation layer (3) made of polyurethane is at least 6 cm thick. RM 449