Attic lining

The first activity is to determine the attic lining line. A laser level can be used for this purpose. We mark the position of the cladding on the gable and knee walls.

Stick insulation tape under the UD 30 profiles – it will significantly improve the acoustic insulation of the plasterboard cladding.

Apply the profiles in a designated place and fasten them to the walls with expansion pins or screws every 80 cm.

Next, set the installation location of ES type or flat L type hangers on the rafters and hooks. The maximum spacing between the hangers must not exceed 50 cm if we intend to install the plasterboards perpendicularly to the lining structure made of CD 60 profiles.

When installing plasterboards in the parallel direction, this distance must not exceed 40 cm. 

The outer hangers can be located from the wall by a maximum of 50 cm.

The type and kind of hanger used is selected depending on the height by which the attic lining structure is to be lowered in relation to the roof structure.

The table shows the maximum distances at which the lining structure can be removed from the roof structure using particular hangers.

At designated locations, screw ES hangers or ES Plus hangers to the rafters face with two wood screws min. ɸ 3.5 mm x 35 mm. The length of the hanger arms ranges from 60 mm to 125 mm.

In the case of L type flat hangers, also called "mushroom" screw them in the designated places to the side of the rafters with two wood screws, min. ɸ 3.5 mm x 35 mm. These hangers must be screwed precisely in accordance with the etched lining plane. Using L-350 flat hangers, we can lower the structure to 30 cm and fill it with an additional layer of insulation material.

We lay thermal insulation between elements of the roof structure and in the space between the roof structure and the future lining structure. The layering of thermal insulation increases the thermal insulation of the roof and significantly reduces heat loss through thermal bridges formed on the rafters and other elements of the wooden structure.

The lining structure is made of CD 60 profiles. When using ES hangers, insert CD 60 profiles between the hanger arms and insert them into UD 30 profiles.

After levelling the profiles, connect them with the hanger arms using sheet metal screws with a self-tapping tip ɸ 3.5 mm x 9.5 mm. Screw 2 pcs. on each side of the connection. In our lining, the plasterboards will be screwed perpendicular to the profiles, which is why the distance between the CD 60 profiles will not exceed 50 cm.

When using L type flat hangers called "mushrooms", plug the profiles into levelled hangers and insert them into UD 30 profiles.

CD 60 profiles can be extended using longitudinal connectors. The longitudinal connector should be inserted into the ends of the profiles to be connected and secured with ɸ 3.5 mm x 9.5 mm self-piercing sheet metal screws. Screw 2 pcs. on each side of the connected profiles. If profiles in adjacent rows are extended, the places where they are connected must be shifted relative to each other by min. 100 cm screws.

At the point of contact of the lining slanted plane with the horizontal plane, the outer profiles are placed side by side. In this place, we install the Flex flexible profile, which stiffens this connection so as to avoid cracks at the contact of these planes. The profile is screwed together using sheet metal screws with a self-tapping tip ɸ 3.5 mm x 9.5 mm and then unscrewed when the board is installed.

After levelling the structure, apply vapour barrier by sticking the membrane to the profiles using double-sided adhesive tape. Seal the membrane joints with suitable tapes.

We cut plasterboards to the appropriate size. The minimum thickness of plasterboards mounted on the attic is 12.5 mm. Screw the plasterboards perpendicular to the profiles in such a way that their shorter edges rest on the profiles. Screw them only to CD 60 profiles and Flex profiles.

The plasterboards in the adjacent strips must be installed in such a way that the joints between the shorter edges are shifted relative to each other by min. 40 cm screws.

The short edges of the plasterboards touching each other must be chamfered at an angle of approx. 45º up to 2/3 of the board thickness.

The maximum spacing of the sheet metal screws must not exceed 17 cm and they should be 10 mm longer than the total thickness of the installed plasterboards. So, to install 12.5 mm plasterboards, ɸ 3.5 mm x 25 mm sheet metal screws should be used.

Apply the Norgips structural joint compound on the board joints on the width of approx. 10 cm After drying, apply joint compound again at the joint and the places where the boards are screwed in using sheet metal screws.

Apply a finishing layer of Norgips compound on the joints of the boards of approx. 20-25 cm wide and fill the screw holes. Once the final layer has dried, sand the excess of the compound to obtain an even and smooth surface.

Then blend the reinforcing tape of paper or fiberglass into it.

After drying, apply joint compound again at the joint and the places where the boards are screwed in using sheet metal screws.

Wet the chamfered joints with water and then fill them with the structural Norgips joint compound.

Once the first layer of the compound has dried, apply the second layer of the compound to the joint and immerse a paper or glass fibre reinforcement tape in the compound.

This results in a structural joint layer defined as Q1 jointing level.

The Q2 surface quality level is usually defined as a standard one because it meets the most common aesthetic requirements for plasterboard surfaces.

In order to obtain a fully homogeneous surface apply a thin layer of a selected Norgips finish joint compound over the entire surface of the plasterboards. After drying, sand the surface to obtain even and smooth surfaces. This level of filling is referred to as Q3.

Using Norgips technology, we build attic cladding easily and quickly, whose smooth and aesthetic surfaces have high acoustic insulation and ensure fire safety.