unilininsulation.ie

XO/XWP

Improved Lambda value 0.020 W/mK

Superior Performance PIR Insulation.

Partial Fill Cavity Walls

XtroWall Plus 110

XO/XWP

XtroWall Plus is a superior performance insulation with Agrément declared Lambda value of 0.020 W/mK and a Euroclass E fire classification. It is faced with a robust aluminium foil and is available with engineered jointing to deliver improved Thermal Bridging detailing. This lower Lambda Value improves U-Values and meets NZEB standards, providing an excellent choice for passive and low energy builds. XtroWall Plus achieves a passive U-Value of 0.15 W/m2K in a traditional cavity wall. Building with Xtrowall Plus, a residual cavity is maintained, offering excellent protection against wind driven rain.

Benefits

  • Achieves 0.15 U-Value in 150mm cavity

  • Improved Lambda value 0.020 W/mK

  • Engineered jointing

  • Corner panels & cavity closers: Reduced Thermal Bridging

  • Clear cavity maintained

Specification Clause

The partial fill cavity wall insulation shall be XtroWall XO/XWP/110 manufactured to EN 13165 by Unilin Insulation, comprising of a rigid modified Polyisocyanurate (PIR) core with textured robust low emissivity foil facings and engineered shiplap jointing. The XtroWall Plus 110mm with a declared Lambda value of 0.020 W/mK to achieve a U-Value of 0.15 W/m2K for the wall element. To be installed in accordance with instructions issued by Unilin Insulation.

An Environmental Product Declaration (EPD), certified by IGBC is available for this product. Please contact technical support for further details.

Refer to NBS clause F30 155, F30 12.
Uniclass Pr 25 71 63 66.

Resistance ‘R’ Values

The resistance value of any thickness of Unilin insulation can be ascertained by simply dividing the thickness of the material (in metres) by its Agrément declared Lambda value, for example: Lambda 0.020 W/mK and thickness 110mm -> 0.110/ 0.020 ->R-Value = 5.5. In accordance with EN 13165, R-Values should be rounded down to the nearest 0.05 (m2K/W)

1. The XtroWall Plus Cavity Wall System includes an optional pre-formed corner panel (XO/CRNXWP) that folds to 90 degrees to effectively insulate a junction that is normally vulnerable to Thermal Bridging and cold spots

2. The XtroWall Plus engineered jointing offers a practical on-site solution that results in a more robust continuous layer of insulation, minimising the threat of Thermal Bridging and improving the overall U-Value of the wall.

3. The textured robust low emissivity foil facing on XtroWall Plus improves the thermal performance of the wall. The residual cavity is the most effective method of preventing wind-driven rain penetrating a wall from the outside.

A residual cavity is the air space that remains when XtroWall Plus is placed against the inner leaf of the cavity of a wall. The recommended residual cavity width required is 40mm in accordance with Irish Building Regulations, however a reduced cavity may be permissible in certain circumstances. A 50mm residual cavity is typically required in Northern Ireland

Find out more about XtroWall Plus 110, Contact Us 046 906 6050

Installation Guidelines

1. Under Eurocode 6/S.R. 325 it is recommended that no more than four courses of block are laid on the preceding skin before installation of the insulation. This allows for wall ties to be inserted accurately and without bending and thus distorting the physical characteristics of the wall ties. Ensure the wall is level and free of any protrusions before installing the insulation with all edges tightly interlocked.

2. Mortar should be struck from the inner cavity face of the block to ensure mortar squeeze is minimized on the cavity side. The two courses of blockwork can then be built, ensuring the mortar is struck back from the cavity face to prevent mortar squeeze.

3. Insert wall ties maximum 600mm centres one block course below DPC. Wall ties should incorporate retaining clips, be Agrément approved and conform to BS EN 845-1:2013+A1:2016.

4. Secure cavity boards tight against inner leaf with retaining clip on wall ties. Boards should be installed with the tongue uppermost and joints should be tightly butted.

5. Ensure a minimum 225mm overlap with the floor insulation. The receiving block should be plumb to provide a flat surface to accept the insulation. As with setting out, installation should commence from adjacent corners using the XtroWall Plus pre-formed corner boards. Alternate corner boards will achieve the offset break-bonded pattern for the insulation.

6. Maintain a 40mm residual cavity to suit all exposure zones. A 50mm residual cavity is typically required in Northern Ireland. In isolated circumstances where the cavity is obstructed, a minimum 25mm residual cavity should always be maintained and extra consideration should be given to fixings and weatherproofing. Any reduction in cavity width should be agreed with Building Control.

7. Place wall ties at maximum 900mm x 450mm centres, securing with a minimum of 3 wall ties per board.

8. Ensure block joints are fully bonded with unbroken mortar. Fix wall ties 225mm vertically and 150mm horizontally from face of unbonded jambs. Ensure wall ties and cavity are kept clean of mortar. Wall ties should be sloped downwards towards outer leaf.

9. A cavity board should be used to keep the cavity clean. XtroWall Plus corner boards and cavity closers may be fitted to provide robust detailing.

10. . Newly erected masonry should be protected to prevent the mortar being washed out of the joints by rain. Walls should be prevented from becoming saturated by covering the top of the wall with waterproof sheets; this is particularly important to minimise the incidence of efflorescence and lime bloom. When any working platform is not in use, the inner board should be turned away from the wall to prevent the splashing of the wall face.

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