Kingspan Kooltherm K10 G2W White Soffit BoardR1.1 | 25.0 mm
Kingspan Kooltherm K10 G2W Soffit Board - White Foil Facing
Kingspan White Kooltherm K10 Soffit Board is a fibre-free rigid thermoset closed cell phenolic insulation core, sandwiched between an upper tissue-based facing and a lower facing of white aluminium foil adhesivley bonded to the insulation core during manufacture.
Features and Benefits of Kooltherm K10 G2W Insulation
- Rigid thermoset phenolic insulation
- Fibre-free, closed cell insulation core
- White finish
- Resistant to water vapour
- Compliant with NCC and AS/NZS 4859.1:2018
- CodeMark-certified for NCC compliance
- Available with FM Approval to FM 4880
- Group 2 NCC fire classification
- Made in Australia
White-Faced Insulation for Concrete Soffits
If correctly applied, Kooltherm products can be expected to have a long life of service. Their durability depends on the supporting structure and the conditions of its use. These products are warranted for a period of 10 years for both residential and commercial installations, subject to the terms of the complete Kingspan Kooltherm® warranty document.Concrete Wall Installation (Clip/Channel System)
- Install chosen furring channel clips at required spacing for plasterboard lining.
- Fit Kooltherm over furring channel clips by pushing over the clips to abut the wall, and so that the wings of the clips penetrate the board. Care should be taken to avoid the foil facing of the Kooltherm separating from the insulation core by neatly trimming the foil face at the point where the furring channel clip penetrates the insulation.
- Butt join boards of Kooltherm to provide a continuous insulation layer.
- Install furring channels by clipping into channel clips. Furring channels should be tight against the face of the Kingspan Kooltherm. Where furring channels are not tight to the insulation contact Kingspan Insulation Technical Service for further advice.
- Install plasterboard lining.
Taping, Cutting, Packaging, Storage and Handling
It is considered best practice to tape joins of Kingspan Kooltherm boards in this system with 48mm wide reinforced aluminum foil tape. When taping a plastic squeegee or blade must be used to apply appropriate pressure to the tape. Surfaces must be dry and free from dust, oil or grease prior to taping. Cutting should be carried out either by using a fine toothed saw, or by scoring with a sharp knife, snapping the board over a straight edge and then cutting the facing on the other side. Ensure accurate trimming to achieve close-butting joints and continuity of insulation. According to quantity, the boards are supplied in packs, labelled and shrink-wrapped in polythene. The packaging of Kingspan Kooltherm should not be considered adequate for long term outdoor protection. Ideally boards should be stored inside a building. If, however, outdoor storage cannot be avoided then the boards should be stacked clear of the ground and covered with an opaque polythene sheet or weatherproof tarpaulin. Boards that have been allowed to get wet should not be used.Request a quote
Kingspan Kooltherm K10 G2W White Soffit Board
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Exposed, FM Approved (11 fixings)
Summarised from the Kingspan Kooltherm K10 G2W White Soffit Board data sheet (KIAU0032, Issue 13, February 2024). Work from the full guide: it has the drawings and every detail. Open the full guide (PDF)
- Store the boards inside a building where possible, or stack them clear of the ground under an opaque polythene sheet or weatherproof tarpaulin.
- Do not use boards that have been allowed to get wet.
- Cut with a fine toothed saw, or score with a sharp knife, snap the board over a straight edge and then cut the facing on the other side.
- Trim accurately so the joints butt closely and the insulation stays continuous.
- Restrain each board to the concrete soffit with at least eleven insulation fasteners with a head diameter of at least 35 mm, spread evenly over the whole board.
- Place four along each length, 50 mm to 150 mm from the board edge, and three along the middle, offset from the edge positions as shown in Figure 4 of the data sheet.
- That is 3.81 fixings per square metre for a 2400 mm x 1200 mm board, the pattern supported by FM Approvals.
- Consult the fastener supplier so the fasteners give suitable restraint for the project.
- Where the board may be subject to external wind pressure, assess the need for extra fixings to the appropriate Australian wind load standards.
- Use a fixing material that the fixing manufacturer deems appropriate for the application, exposure and fire rating.
- Lay the boards with staggered or squared joints and tape every joint with 96 mm wide white Kingspan Insulation Tape.
- Check that the climate conditions suit the tape and the board, then clean the surface with a dry cloth so it is free of dust, dirt and oils.
- Remove the release liner 300 to 600 mm at a time and press the tape firmly onto the facing, centred over the join, without stretching it.
- Wipe the tape firmly from the centre out, like wallpaper, with a plastic squeegee, then cut and fit it with a knife and scissors and wipe again.
- Fit the board tight to fire collars, but never cover the face of a collar, because it must be exposed to activate in a fire.
- Protect exposed board edges with white Kingspan Insulation Tape lapped at least 48 mm onto the board face, or with a proprietary metal c-section.
Install in accordance with AS 3999:2015 Bulk Thermal Insulation Installation and AS 3000:2018 (Wiring Rules). Foil facings conduct electricity, so avoid contact with un-insulated electrical cables and fittings.
Behind a lining (5 fixings)
Summarised from the Kooltherm K10 G2 Soffit Board Technical Bulletin, fixing requirements (KIAU0276, Issue 2, August 2026); fire collars from the Kingspan Kooltherm K10 G2W White Soffit Board data sheet (KIAU0032, Issue 13, February 2024). Work from the full guide: it has the drawings and every detail. Open the full guide (PDF)
- Use this pattern only where the board sits behind an appropriate internal lining, such as a suspended ceiling, and its Group Number classification is not required.
- It does not apply where FM 4880 compliance (11 fixings) or product fire performance is required.
- Restrain each board with at least 5 appropriate insulation fixings, spread evenly over the whole board.
- Place two along each length, 50 mm to 150 mm from the board edge, and one along the middle, as shown in Figure 3 of the bulletin (1.74 fixings per square metre for a 2400 mm x 1200 mm board).
- Check with the fixing supplier that the anchorage strength is more than sufficient to carry the weight of the board.
- Lay the joints staggered in a brick-laid pattern or squared against the rigid substrate, and tape them with 96 mm wide Kingspan AIR-CELL Insulation Tape.
- Taped joints reduce the risk of condensation when cold air meets the soffit through joint gaps.
- The board surface carries oil and dust residue from manufacturing, so clean it with a dry cloth before taping.
- The surface the tape goes on must be free of dust, dirt and oil.
- Wipe the tape firmly from the centre out, like wallpaper, with a plastic squeegee.
- The more pressure you apply, the more surface contact and the stronger the bond.
- Take the lining's battens or structural framing, and how they are fixed to the soffit through the board, into account.
- The fixings of the lining's support system give the board further securement into the soffit.
- Fit the board tight to fire collars to reduce thermal bridging through the slab.
- Never cover the face of a fire collar, because it must be exposed to activate in a fire.
Install in accordance with AS 3999:2015 Bulk Thermal Insulation Installation and AS 3000:2018 (Wiring Rules). Foil facings conduct electricity, so avoid contact with un-insulated electrical cables and fittings.
Insulation Installation - Do It Yourself
Many homeowners choose to install their own insulation. Done properly, it can be a rewarding DIY project that makes your home more comfortable and energy efficient. To get the best results, it’s important to install insulation batts correctly. Otherwise, their performance can be reduced by up to 50%. If you choose to take on the home insulation installation yourself, we strongly recommend that you familiarise yourself with the proper process. Make sure you check the relevant standards prior to commencing the installation.
Using a sharp knife, and a thin plank of wood as a guide, can make cutting insulation batts easier. Experienced insulation installers will often size up the cut with a glance and press the insulation against a vertical timber wall stud before cutting the batt to the desired width or length. This can save time, but care must be taken to ensure that you keep the knife blade well clear of any wiring or other appliances.
General install tips
DIY Install Tips for Beginners
The following principles of installing insulation will ensure the best possible performance from home insulation.
- Avoid gaps in insulation
- Do not compress bulk home insulation
- Allow clearance around appliances and fittings
- Protect your home insulation from contact with moisture
- Use a broom handle with a nail in the end to access hard to reach areas
- Provide vapour and moisture barriers to prevent condensation
Improve the Thermal Performance of Home Insulation
- Fit batts snugly leaving no gaps around ducts and pipes
- Make sure corners, junctions of wall-floor-ceiling are fully covered
- Isolate metal framing from contact with cladding
- Insulate window frames or install windows with thermal breaks
Home Insulation Clearance Requirements
Some appliances and fittings, such as recessed downlights and heater flues, require free space around them for the dissipation of heat, to reduce fire hazard. Insulation should not be placed against these fixtures.
- Recessed downlights – Minimum clearance of 25mm
- Flues and exhaust fans – Minimum clearance of 25mm
- Electrical wiring – Keep wiring clear of insulation (check with electrician before installing insulation)
Condensation
Home insulation, correctly installed, can keep the interior surface temperature of ceilings and external walls above the dewpoint, preventing condensation on these surfaces. Condensation control involves preventing moist air from coming into contact with cold surfaces below the dewpoint of the air by one or more of the following means:
- Good ventilation of the moisture-laden air.
- Insulation to keep ceiling and wall temperatures above dewpoint.
- Heating to prevent indoor surfaces from cooling below the dewpoint.
Protect Insulation from Contact with Moisture
Masonry walls are not waterproof. In both brick veneer and double-brick wall construction a cavity between the external masonry wall and the internal lining keeps the internal lining dry. Moisture on the internal face of the external masonry wall can drain away through weepholes or evaporate into the cavity.
- Brick veneer construction – make sure the insulation remains within the frame. Use reflective foil, galvanized wire or building paper to keep the bulk insulation in place.
- Cavity masonry walls – restrain bulk insulation to maintain at least 30mm cavity.
- Existing wall cavities – use ‘cavity fill’ water-repellent loose-fill granular rockwool insulation. This material contains a water repelling agent to prevent absorption of moisture.
Sealed Air Space with Reflective Foil
- Reflective insulation adjacent to a solid surface without an airspace, has no insulative value and acts only as a vapour barrier. To add thermal resistance, reflective insulation must face a sealed air space.
- Maintain a sealed air space of at least 25 mm.
- Eliminate air movement between air spaces on either side of the foil.
- Overlap sheets by 150 mm and tape over joins; seal any gaps.
- Use face-of-wall brick ties instead of ties which penetrate the foil.
- Reflective surfaces should be kept clean and dust free, vertical installation is best for this.
Insulation Installation – Clearance Around Appliances and Fittings
Caution When Using Foil Products
- Keep foil products away from electrical power outlets or lights as they can conduct electricity through the aluminium metal reflective covering.
- Care must also be taken when installing under metal or tile roofs.
Wear Protective Clothing Before You Insulate
- When installing insulation in the roof space, it’s recommended to wear goggles, a dust mask, gloves, long pants and a long sleeve shirt.
Install instructions
How to install ceiling insulation
Do not start work until the site is safe!
Insulation batts installation - all work must be completed to the requirements of relevant standard: AS3999:1992
Step 1
- Ensure you have the right product for the application for your roof insulation installation. Check that you have the correct R-Value required on the drawings/plans.
- Check the joist width to determine the correct insulation batt width. (e.g. 430mm or 580mm)
Start from the furthest point, ensuring the top plate (top of the wall) is covered and work back towards the access hatch of the ceiling. - When installing, energise each batt by giving it a light shake and gently bouncing it on its side, to help the batt expand to the thickness specified on the label. Remember: the best house insulation performance will be achieved by following the manufacturers guidelines.
Step 2
- The insulation may be trimmed to appropriate sizes if required.
- Make sure when installing roof insulation that you leave sufficient clearances around recessed lights, extractor fans, chimney elements and piping as appropriate.
- Where possible, place insulation under electrical cables and ductwork.
- Use any off-cuts to fill voids.
- Glue or fix insulation to the back of the access lid or hatch.
Step 3
- Always make sure your insulation has a snug fit, with a uniform finished height of insulation. Check tips and tricks for good techniques in achieving this.
Step 4
- Once you have completed installing your home insulation, make sure you keep a copy of the product specification together with the documentation of your house.
How to install wall insulation
Do not commence installing insulation until the site is safe!
Installation must be completed to the requirements of relevant standard: AS3999-1992
Step 1
- Ensure you have the right product for the application. Check that you have the correct R-Value required on the drawings/plans.
- Check the joist width to determine the correct insulation batt width. (e.g. 430mm or 580mm)
Work progressively around the perimeter of the building/room. - When installing, energise each batt by giving it a light shake and gently bouncing it on its side, to help the batt expand to the thickness specified on the label.
Step 2
- The insulation may be trimmed to appropriate sizes if required. When cutting* to fill a void, oversize by around 10mm to ensure a snug fit. Do not leave folds or compress the insulation material.
- Fill gaps around lintels, double framing, windows and doors with off-cuts.
- Trim and place product around vents to allow ventilation systems to operate as intended.
- Shape and fit insulation behind electrical wiring and plumbing work.
- Use string to hold in place (if required).
- Ensure insulation does not protrude beyond the line of the studs.
Step 3
- Always make sure your insulation has a snug fit, with a uniform finished height. Check tips and tricks for good techniques in achieving this.
Step 4
- Once you have completed your insulation installation make sure you keep a copy of the product specification with the documentation of your house.
How to install underfloor insulation
Do not start work until the site is safe!
Insulation installation must be completed to the requirements of relevant standard: AS3999:1992
Step 1
- Ensure you have the right product for the application. Check that you have the correct R-Value required on the drawings/plans.
- Check the joist width to determine the correct insulation batt width. (e.g. 430mm or 580mm)
The insulation should always be fitted with strapping. - If fitted to fold down the fold should be no more that 75mm below the bottom of the product.
- Start from the furthest point ensuring the bottom plate is covered and work back towards the access entrance of the underfloor.
- When installing, energise each batt by giving it a light shake and gently bouncing it on its side, to help the batt expand to the thickness specified on the label.
Step 2
- The insulation may be trimmed to appropriate sizes if required.
- Install the insulation in accordance with AS3999:1992, ensuring appropriate clearances from recessed lights, plumbing, extractor fans, chimney elements and piping.
- Refer to relevant standard for guidance regarding placement of insulation and stapling around electrical wiring.
- EXTREME CAUTION REQUIRED. If insulation is covering any wires, apply the Electrical Hazard labels at that point
Step 3
- Place long edge side of the insulation first neatly into the joist/underside of floor intersection
- Pressure fit the body of the insulation flush up under the floor
- Fold the opposite edge down so that a snug fit is achieved
- Leave no gaps between the insulation and the framing and the underside of the floor
- Fix strapping across the underside of the insulation batt
- Each insulation batt should have three runs of strapping applied, one at approx. 100mm from each end and one diagonal or across the centre of the insulation batt.
- Always ensure the insulation has a snug fit. Refer to the tips and tricks for techniques to reach tight spaces.
Step 4
- Once you have finished installing the insulation make sure you keep a copy of the product specification with the documentation of your house.
Top tips and tricks
Preload the ceiling before plastering
If you are building a new home it is a good idea to get the insulation above the ceiling before the roof space is enclosed.
For hard to reach areas, use a broom handle with a nail through the tip to spike the batt and position it.
You need ventilation while you work. If the roof is tiled, kick back some tiles for ventilation.
Try to avoid installing on a hot day, but if you are start nice and early and drink plenty of water throughout the day.
Use thick plywood or a wooden plank to support yourself over the ceiling rafters. This is more comfortable for your knees than kneeling on the rafters.
Knauf Insulation Earthwool Insulation is a new generation of softer, safer and more environmentally friendly glasswool insulation specifically designed for DIY installation.
Install guides for this product are below. Need a hand? Call 1300 729 639.
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