Wall

CAVITY WALL
    General
    The installation of wall insulation

INTERNAL INSULATION
    General
    Sawing and cutting Eurothane G boards
    Installing Eurothane G boards
              Fixation to a wooden supporting structure
              Fixation by means of adhesive gypsum plaster
    Joints of the Eurothane G insulation boards
    Finishing
              General
              Wallpapering
              Painting
              Tiling
              Attaching objects

OUTSIDE WALL
    External metal facing
    External facing

CELLAR WALL
    External wall insulation - fixation using PUR glue
    External wall insulation - glueing together using hot bitumen


 
CAVITY WALL


GENERAL

The principle of every cavity wall (regional differences in wall thicknesses and cavity widths left out of consideration) is as follows:
1. Half bond masonry outer cavity leaf
2. Cavity
3. Half or header bond masonry inner cavity leaf
4. Internal plasterwork

The function of a cavity wall is to prevent any transfer of water to the inner cavity leaf.

In general, it can be stated that:
outer cavity leaf = rain barrier
cavity = capillary groove
inner cavity leaf + plaster = airtightness

Allowance must be made for the fact that, in downpours, sooner or later (according to the capillarity of the brick) more or less water will run off at the cavity side of the outer cavity leaf. This water must be drained outside at the cavity seals.
No definitive guarantee can be given with regard to rainproofing if:
- the inner cavity leaf is highly air permeable (e.g. clean masonry)
- the outer cavity leaf is constructed with non-capilliary bricks
- the cavity is (too) narrow

The cavity may or may not have extra ventilation. It is said to be extra ventilation when one or more joints above or below is left open per metre length.
During the construction, the inner and outer cavity leaves are connected to each other with cavity anchors.
Refer to the UBatc information leaflet “Insulated cavity walls with masonry walls” for an exhaustive description of the architectural design and implementation principles.


THE INSALLATION OF WALL INSULATION

    Full Cavity wall


INTERNAL INSULATION

Insualtion of the inner wall 


GENERAL

Before the cutting and processing of EUROTHANE G insulation boards is started, the building must be wind and rainproof.

In a space with a relative air humidity of up to 80 to 85% at a normal temperature (5 to 20°C), boards can be installed without any problems.
Higher air humidities do not cause any immediate problems either as long as they are of short duration. 


SAWING AND CUTTING EUROTHANE G BOARDS

Thin EUROTHANE G boards can be cut by means of a universal knife or utility knife. Both the polyurethane insulation and the cardboard on the back must be cut through for this. Then the board is broken, where you must ensure that you do not damage the cardboard on the visible side.
- Thicker EUROTHANE G boards are generally sawn with a jigsaw or hand saw. Always saw with the visible side towards you.
- When a strip of insulation material has to be removed, the insulation material must be cut through with a knife, but without cutting into the plasterboard.
- Then remove the insulation material by inserting a knife or filling knife behind the plasterboard and cutting or chipping away the polyurethane foam.
- The removal of a strip of plasterboard is done in exactly the same way.
- A V-shaped groove is cut into the visible side of the plasterboard so that the cardboard on the back of the plasterboard is also cut through.
- The plasterboard strip can be removed by inserting a knife or putty knife behind the plasterboard and cutting or chipping away the polyurethane foam.
- A metal drill bit should preferably be used for drilling EUROTHANE G boards. If cut or sawn edges have to be finished, a surform can be used.

Insulation: sawing and cutting Eurothane G boards


INSTALLING EUROTHANE G BOARDS

- fixation to a wooden supporting structure
- fixation by means of adhesive gypsum plaster


JOINTS OF THE EUROTHANE G INSULATION BOARDS

When all the EUROTHANE G boards are in position, the jointing activities can start. Ideal conditions are a room temperature of 20°C and a relative air humidity of 60%. The adhesive gypsum plaster must not be prepared at temperatures below 5°C. Furthermore, do not prepare more joint material than can be used in 30 to 40 minutes.

Long sides
- A first layer of joint material should be applied to all openings in and between the boards and to repair any damage. This should be done with a 100 mm wide filling knife.
- After the preliminary filler has completely set (± 2 hours), a ± 2 mm thick and 60 mm wide strip of joint material can be applied with the 100 mm wide filling knife. The joint tape is then pressed as far as possible into this wet mortar.
- The mortar pushed aside is immediately brushed over the joint tape with a broad filling knife so that the chamfering is completely filled after this action.
- Finally, after this last layer has cured, a new layer of joint tape is applied over a width of 200 to 300 mm. The surface of the mortar is now level with the face of the EUROTHANE G boards.
- After drying (± 10 hours) the roughest unevenness can be sanded down with dry sandpaper no. 80.
- After removing any dust, a very thin coat (at least 100 mm wider than the joint filler layer) of plaster finish can be applied. This should be lightly roughened with a dry sandpaper no. 120.
- The long sides have been chamfered at the factory.

Insulation: joints of the Eurothane G insulation boards
Joint seal

1. Joint finishing plaster
2. Joint material
3. Joint tape
4. Joint material
5. Chamfered edges

Recessed corners
- Apply joint material to both wall surfaces at the same time using an angle trowel.
- Apply the joint tape as described above. Cover the joint tape along both sides with joint filler mortar over a width of about 100 mm along both sides.
- Sand and apply joint finish mortar so that it extends about 50 mm beyond the joint filler mortar.

Projecting corners
- Here joint tape is not used, but a joint strip with a metal inlay.
- First of all, joint material is applied to both wall surfaces using an angle trowel for projecting corners over a width of 50 mm on each side of the corner.
- Then the joint strip is folded to the desired angle and pressed into the joint material so that the metal inlay is positioned where the EUROTHANE G boards are. Surplus joint material is removed before a second layer of joint material is applied over a width of about 200 mm on each side of the corner.
- Sand and apply joint finish mortar so that it extends about 50 mm beyond the joint filler mortar.

Crosscut board sides
- The crosscut sides of EUROTHANE G boards are not chamfered. The edges must then also be chamfered (width ± 100 mm) so that the joint tape can be applied.
- Finishing is done in exactly the same way as explaine  in Section 1.

NOTE:
Nail and screw holes must also be finished with two layers of joint material. 


FINISHING 


General
- Most common finishing materials can be applied to EUROTHANE G boards. Calcareous finishing products are not suitable however.
- After the joint mortar has cured, any dust must be removed from the boards and a coat of primer applied (except with tiles).


Wallpapering
- Waterproof wallpaper is glued to Eurothane G with a non water-based adhesive. The compatibility of the primer and the wallpaper paste must always be checked (this is important when using heavier wallpaper).
- The coat of primer also ensures that the wallpaper can be removed easily: dry, with water or with steam.


Painting
- Applying a coat of primer is also recommended here. This must be suitable for use with the chosen paint. Normally, 2 or more coats of paint must be applied.
- When using gloss paint, filling the whole of the board surface first is definitely recommended.


Tiling
- A resin-based tile adhesive must always be used to glue tiles to EUROTHANE G boards.
- Tiles with a thickness of up to 10 mm can be applied normally in this way. The tiles must always be applied according to the tile manufacturer’s instructions.


Attaching objects
- When objects must be attached to EUROTHANE G boards, plastic or metal hollow wall plugs must be used.
- The permissible forces per plug are: on ceilings: 50 N (5 kg), on walls: 250 N (25 kg)
- Heavier objects must be secured to the supporting structure.


OUTSIDE WALL

- External metal facing
- External facing


CELLAR WALL

- External wall insulation - fixation using PUR glue
- External wall insulation - glueing together using hot bitumen

Products Wall

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