If you have pre-customised this work section using the "questions and answers" provided as part of the downloading process, it may be necessary to amend some clauses to suit the final project-specific version.
The section must still be checked and customised to suit the project being specified, by removing any other irrelevant details and adding project-specific details and selections.
For compliance of the building thermal envelope use:
The Acceptable Solutions contain a Schedule and a Calculation method & the Verification Methods contain a Modelling method for determining construction R-values required.
The acceptable methods of determining the thermal resistance (R-values) of slab-on-ground floors is either NZBC H1/AS1-AS2 Appendix F performance tables described in F1.2 or the Calculation method set out in NZBC H1/VM1-VM2 Appendix F.
Note: NZBC H1/AS1 & VM1, for housing only, building consent applications submitted before 1 May 2023:
This section relates to Knauf Insulation ClimaFoam® extruded polystyrene (XPS) board for use as thermal insulation:
Modify / expand this clause to suit requirements of this specification section
Note- Knauf Insulation Technical Datasheet recommend use of ClimaFoam® is restricted to areas not exposed to fire i.e. underground.
Refer to ~ for ~.
Include cross references only to other work sections where they include directly related work.
Refer to the appropriate concrete section for insulation under concrete slabs.
Refer to the appropriate concrete section(s) for reinforcement, also placing and curing of concrete.
Refer to the general section 1233 REFERENCED DOCUMENTS. The following documents are specifically referred to in this section:
NZBC B1/VM1 | Structure |
NZBC H1/AS1-AS2 | Energy efficiency |
NZBC H1/VM1-VM2 | Energy efficiency |
Timber-framed buildings | |
Steel reinforcing materials | |
Thermal insulation materials for buildings - General criteria and technical provisions | |
BS EN13164 | Thermal Insulation Products for Buildings - Factory Made Extruded Polystyrene Foam (XPS) Products - Specification |
Delete from the DOCUMENTS clause any document not cited. List any additional cited documents. The following are related documents and if referred to in the work section need to be added to the list of DOCUMENTS.
NZBC C/AS2 | Protection from fire |
NZBC E3/AS1 | Internal moisture |
NZBC B2/AS1 | Durability |
NZBC F2/AS1 | Hazardous building materials |
Pliable building membranes and underlays - Materials | |
Energy efficiency - Large buildings - Building thermal envelope | |
Energy efficiency - Installing bulk thermal insulation in residential buildings | |
Zinc and zinc/aluminium-alloy coatings on steel wire | |
BRANZ BU 668 | Complying with H1 - Housing and Buildings up to 300m² |
BRANZ BU 672 | Specifying floors under H1 |
Manufacturer's and supplier's documents relating to this part of the work:
Knauf Insulation ClimaFoam® XPS Brochure
Knauf Insulation ClimaFoam® XPS Datasheet
Copies of the above literature are available from:
Web: | |
Email: | tech.nz@knaufinsulation.com |
Telephone: | 0800 562 834 |
It is important to ensure that all personnel on site have access to accurate, up to date technical information on the many products, materials and equipment used on a project. In most cases individual products are not used in isolation, but form part of a building process. Also a particular manufacturer's and/or supplier's requirements for handling, storage, preparation, installation, finishing and protection of their product can vary from what might be considered the norm. Access to technical information can help overcome this potential problem.
Work to be carried out by trades people experienced, competent and familiar with the Knauf Insulation materials and techniques specified.
Substitutions are not permitted to any specified Knauf Insulation products, components or accessories.
ClimaFoam® is a combustible material. Ensure a minimum clearance of 100mm between ClimaFoam® and heat sources or electrical cables. For insulation clearances to inbuilt recessed hot appliances - refer to NZS 4246.
Do not store product close to open flames or oither ignition sources.. Refer to Technical Datasheet .
Rigid extruded polystyrene (XPS) board to NZBC H1/AS1-AS2, AS/NZS 4859.1, BS EN13164. Water resistant. Lightweight with a compressive strength of 250kPa. Sheet size 2200mm long x 1200mm wide, thickness range from 30mm to 75mm, with shiplap edge detail. Refer to SELECTIONS.
Thickness (mm) | Thermal Conductivity (15°C) | R-Value (m²K/W) | Compressive Strength kPa | Edge Detail |
30 | 0.028 | 1.1 | 250 | Shiplap |
40 | 0.028 | 1.4 | 250 | Shiplap |
50 | 0.028 | 1.8 | 250 | Shiplap |
75 | 0.028 | 2.7 | 250 | Shiplap |
Modify title, select board thickness, to suit project requirements.
NOTE - NZBC H1/AS1-AS2 references AS/NZS 4859.1; AS/NZS 4859.1 references BS EN 13164
Rigid extruded polystyrene (XPS) board to NZBC H1/AS1-AS2, AS/NZS 4859.1, BS EN13164. Water resistant. Lightweight with a compressive strength of 250kPa. Sheet size 2200mm long x 1200mm wide, thickness range from 30mm to 75mm,
with shiplap edge detail. Refer to SELECTIONS.
Thickness (mm) | Thermal Conductivity (15°C) | R-Value (m²K/W) | Compressive Strength kPa | Edge Detail |
30 | 0.028 | 1.1 | 250 | Shiplap |
40 | 0.028 | 1.4 | 250 | Shiplap |
50 | 0.028 | 1.8 | 250 | Shiplap |
75 | 0.028 | 2.7 | 250 | Shiplap |
Modify title, select board thickness, to suit project requirements.
NOTE - NZBC H1/AS1-AS2 references AS/NZS 4859.1; AS/NZS 4859.1 references BS EN 13164
Note: NZBC H1/AS1 notes installation to NZS 4246 section 10 Concrete-on-ground insulation, for light timber and steel framed residential buildings. NZBC H1/AS1 comments slab perimeter insulation should be protected from water absorption, ultraviolet light and impact damage. However, deviating from step 2 in section 10 in NZS 4246, encapsulation of slab perimeter insulation is not recommended as it can result in moisture getting trapped.
Keep materials dry in transit. Take delivery of materials in an undamaged in condition. Reject all damaged materials.
Accept materials undamaged and dry and store in a location that protects them from the weather. Do not store close to open flames or other ignition sources. Avoid distortion, stretching, puncturing and damage to edges of sheet materials.
Wear protective clothing as necessary and when handling, avoid delamination or distortion of the rectangular form.
Do not subject the ClimaFoam® XPS board to prolonged saturation or exposure to sunlight. Do not allow the XPS board to come into contact with solvents.
XPS is a closed cell material and does not readily absorb water. Even in this situation it maintains its shape, size, structure, and physical appearance.
Lay polythene layer to NZS 3604: clause 7.5.4, Damp-proof membrane.
Modify or delete this clause when specifing in an approriate concrete section. Polyethylene is often described as "polythene" in New Zealand. A subgrade damp-proof membrane is sometimes described as a vapour barrier.
NOTE: This clause describes the minimum acceptable membrane for damp-proofing under a concrete floor slab, as set out in NZS 3604.
Install the ClimaFoam® XPS Boards once the polythene DPM has been laid. Place the ClimaFoam® XPS boards on top of the polythene DPM and butt together. Do not place the boards under any footings or thickenings. Cut holes in the boards where necessary with a sharp knife to accommodate any services. Lay reinforcing steel mesh over the boards on mesh chairs.
Lay welded reinforcing mesh. Bars to AS/NZS 4671. Grade 300E deformed, other than for ties, stirrups and spirals, unless shown otherwise on the drawings. Welded reinforcing mesh to AS/NZS 4671.
Modify or delete this clause when specifing in an approriate concrete section. Providing more detail on types of bars and mesh as appropriate.
Do not place concrete until all excavations, boxing and reinforcing have been inspected and passed by the Building Consent Authority.
Add any requirements for inspection by a chartered professional engineer, building certifier or contract administrator.
Install the ClimaFoam® XPS Board to form a continuous barrier around the slab edge before the concrete is poured. Cut holes in the boards where necessary with a sharp knife to accommodate any services.
Remove debris, unused materials and elements from the site. Clean soiled or marked work. Replace damaged, cracked or marked elements. Leave the whole of this work to the standard required by following the execution procedures.
Protect new work from damage.
Location: | ~ |
Brand: | Knauf Insulation ClimaFoam® |
Size: | 2200mm x 1200mm |
Thickness: | ~ |
kPa: | 250 |
R value: | ~ |
Edge detail: | ~ |
Thickness (mm) | Thermal Conductivity (15ºC) | R-Value (m²K/W) | Compressive Strength kPa | Edge Detail |
30 | 0.028 | 1.1 | 250 | Shiplap |
40 | 0.028 | 1.4 | 250 | Shiplap |
50 | 0.028 | 1.8 | 250 | Shiplap |
75 | 0.028 | 2.7 | 250 | Shiplap |
Location: | ~ |
Brand: | Knauf Insulation ClimaFoam® |
Size: | 2200mm x 1200mm |
Thickness: | ~ |
kPa: | 250 |
R value: | ~ |
Edge detail: | ~ |
Thickness (mm) | Thermal Conductivity (15ºC) | R-Value (m²K/W) | Compressive Strength kPa | Edge Detail |
30 | 0.028 | 1.1 | 250 | Shiplap |
40 | 0.028 | 1.4 | 250 | Shiplap |
50 | 0.028 | 1.8 | 250 | Shiplap |
75 | 0.028 | 2.7 | 250 | Shiplap |