Prevent Heat Loss with MAXRaft Insulated Floor Slabs

With an approximate R-value of 4.5, MAXRaft enables homeowners to use the concrete slab as a battery for their home, anywhere in New Zealand.

MAXRaft slabs prevent the 15% of heat loss in a home’s foundation and are approximately only 10% more expensive than a traditional waffle slab. With its patented edge profile, MAXRaft slabs also prevent 80% of heat lost through the edge of the foundation. Being fully insulated they are a great match when used in conjunction with underfloor heating.

MAXRaft is a premier concrete slab option that is both BRANZ appraised and CodeMark certified to give architects peace of mind. MAXRaft has a range of systems available on sites classified as good ground, TC2, piles and expansive soils. There is also a mid-floor system, MAXSpan.

Easy to specify, MAXRaft details can be found via their website or on any of NZ’s top architectural specification websites. Engineering design can be completed by MAXRaft or by any NZ chartered structural engineer. With installers available throughout the country, designers can opt for the supply of materials only or a full Installation.

With a focus on sustainability right through their process, all polystyrene components contain 15% recycled material and are delivered to site in pre-cut segments. A panel plan is provided making the onsite installation easy. Following installation, any waste is picked up, recycled and made back into insulating material.

The thermal envelope is critical to the performance of a home. To design warm, healthy and cost-effective living environments, Maxraft recommends starting with the right foundation.

MAXSlab

MAXRaft

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MAXSlab is an insulated, concrete slab-on-ground flooring system for use in residential and light commercial buildings.

The MAXRaft Concrete Slab Floor System (MaxSlab) can be used to construct steel reinforced, concrete slab-on-ground floors subject to specific engineering design for buildings within the following scope:

Ground floor slabs for timber-framed buildings, within the scope of NZS 3604, or other similar lightweight constructions where they are subject to specific engineering design; and
Built on 'good ground' as defined by Acceptable Solutions and Verification Methods for NZBC Clause B1 Structure; or,
Built on 'TC2' type ground within the 'Canterbury earthquake region' or moderately to highly expansive soils, subject to verification and assessment by a Chartered Professional Engineer

See BRANZ Appraisal 1054 for full information.

Use the MAXRaft R-value Calculator to find the product from the MAXRaft range to meet & exceed the requirements of H1

If designed, used, installed and maintained in accordance with the statements and conditions of the BRANZ appraisal, the MAXRaft Concrete Slab Floor System (MaxSlab) will meet the following provisions of the NZBC:

Clause B1 Structure: Performance B1.3.1, B1.3.2 and B1.3.4. the MAXRaft Concrete Slab Floor System meets the requirements for loads arising from self-weight, imposed gravity loads, earthquake, wind, differential movements and time dependent effects including creep and shrinkage. [i.e. B1.3.3 (a), (b), (f), (h), (m) and (q)]. See Paragraphs 7.1 – 7.2
Clause B2 Durability: Performance B2.3.1 (a) not less than 50 years and B2.3.2. MAXRaft Concrete Slab Floor System meets these requirements. See Paragraphs 8.1 – 8.3
Clause E2 External Moisture: Performance E2.3.3. The MAXRaft Concrete Slab Floor System meets these requirements. See Paragraphs 10.1 – 10.3
Clause F2 Hazardous Building Materials: Performance F2.3.1. The MAXRaft Concrete Slab Floor System meets this requirement and does not present a health hazard to people.
Clause H1 Energy Efficiency: Performance H1.3.1 and H1.3.2E. The MAXRaft Concrete Slab Floor System contributes to meeting these requirements. See Paragraphs 12.1 – 12.2

See BRANZ Appraisal 1054 for full information.

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