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Thursday, October 10, 2013

Thermal Insulation System for walls

Insulation system for walls in Middle East

wall insulation element has a polyurethane (PUR) high-resistance foam core free of FCKWs (ozone destroyer), which provides the highest possible energy saving with its insulation value ranging from 0.0280-0.0214 W/m.K. The PUR-core is covered with an aluminum foil on the underside to enhances the U- value. The Fleece-coated side, on which the various coatings are applied, such as various kinds of plasters, closers made of natural material, Brick slips or other forms of wall design are just easy to apply, extremely high tensile strength and outstanding coefficient of adhesion. The fiber mesh also gives advantage of more reinforcement to the whole area of where the plaster is going to be applied and the insulation fixing (Poly Porpylene Plugs) is used as a mechanical fixing to fix the board to the wall.

1.Fixing of Aluminum / Render Profile:

Starting from the walkway level by 25 cm above, fix the aluminum profile, using steel nails, which acts as the base of the system. This profile must have a width of 43 mm for an insulation board of 40 mm, a gap of 3mm is provided for fixing the plaster profile (refer fig-3) later on. The aluminum profile and plaster profile is used for every floor.
Wall Insulation Method and application Middle East
2. Leveling the surface of the wall and fixing the Insulation board:

Mix Insubond Plaster with water thoroughly to form a paste, (refer technical data of Insubond-conmix plaster). Level the wall by applying Insubond over the surface of the wall & work it out using a threaded trowel. The minimum amount of 1.5kg/m2 of insubond is applied over the first layer. After 5-10 minutes, apply Insubond over the surface of the insulation board (the aluminum foil side) & work it out by threaded trowel, fix the insulation board in a Staggered Method (refer fig-7)
Wall Insulation Method and application Middle East
3. Fixing of Plaster Profile, Fiber-Glass Mesh:

A plaster profile of width 5-mm is fixed in front of the aluminum profile (ref fig-1) this profile is used as starter for Insubond plaster. To identify the place to be used for fixing the insulation board using Plugs, a certain area is marked using 5mm thick insubond. Over this marked area, and alkaline resistant Fibre Glass Mesh (min 180-200 g/m2) is embedded using a trowel.
Wall Insulation Method and application Middle East
4. Mechanical fixing of Insulation Board, Corner Profile:The insulation board and fibre glass mesh are fixed using Propylene Plugs with reinforced Nylon Nail over the marked area. To fix an insulation board of lm2, 10 insulation fixing is needed.(ref fig-7) The method of fixing the plug is shown in the fig-8. Drill the hole of required thickness using 8mm drill-bit, fix the plug & hammer the nylon nail using a mallet (ref fig-7-8). Then apply a prime thin layer of insubond plaster, press gently mesh with the trowel and fix the Corner profile over the corners which gives straight edges for the building (ref Technical data of fiber mesh). After these application the wall is cured for 48 hours.Wall Insulation Method and application Middle East
5. Applying final layer of Insubond:

After curing the wall for 48 hours the final layer of Insubond-conmix plaster of thickness 3-5 mm is applied over the area and again the wall is cured for 48 hrs.
Wall Insulation Method and application Middle East
6. Decorative Plaster Coating:

After the final layer of Insubond is cured and dried, the required finishing coat can be applied either by trowel, roller or spray. The coating can be of different colors & thickness as per the customer's requirements. The decorative layer should not be more than 15mm and it is recommended to use light colored plasters, since it absorbs less heat.
Possible options for the final wall designs are:

• Trowelled rendering • Float Finish
• Variegated stone/ pebble rendering
• Plastic flat facing bricks • Facing bricks of natural material • Common cement-lime plaster.
Wall Insulation Method and application Middle East

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