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Materials

MAT-1 Materials Selection

 

AIM

To encourage and recognise the specification and use of responsibly sourced materials that have lower environmental impacts over their lifetime.


CREDIT CRITERIA

(1) Where the tally of merits ≥ 1 (1.0 point)
(2) Where the tally of merits ≥ 2 (3.0 points)
(3) Where the tally of merits ≥ 3 (5.0 points)
(4) Where the tally of merits ≥ 4 (7.0 points)
(5) Where the tally of merits ≥ 5 (9.0 points)

Points are awarded where there is a selection of reused, eco-preferred or responsibly sourced materials over 50% of the following 13 construction systems:
1. Foundation e. g.: concrete, steel reinforcement
2. Floor slab e.g.: timber, concrete including waffle pod
3. Frame e.g.: wall framing, ceiling framing, roof framing / trusses
4. Wall e.g.: interior linings, exterior cladding, dry wall
5. Roof e.g.: tiles, sheeting
6. Drainage e.g.: drainage pipe, guttering
7. Window e.g.: window glass, frame, fixtures
8. Insulation e.g.: floor insulation, wall insulation, ceiling insulation
9. Ceiling e.g.: ceiling interior linings
10. Floor coverings e.g.: carpet, wood, ceramic floor finish
11. Applied Coatings e.g.: paint
12. Joinery e.g.: Joinery, cabinetry in kitchens and bathrooms, laundries and bedrooms
13. External decking e.g.: timber

Reused material - 1 merit
Approved eco-labels as per NZGBC website - Up to 1 merit

Forest Stewardship Council (FSC) - 1 merit

ISO 14001 - 0.5 merit

Enviro-Mark NZ Gold or above - 0.25 merit

Recycled Content Product - Merits=Fraction of product that is recycled

Dematerialisation - 1 merit

End-of-Life Stewardship Programme - 0.5 merits

CarboNZero product certification - 0.5 merits

Declare - 0.25 merits

CEMARS product certification - 0.25 merits

Design Rating Documentation

how the Living House does

The Living House has not yet fully defined all of the materials that will be going into the dwelling. However to easily document the Design Rating for Homestar we decided to target merits in the following construction systems:

1. Foundation 
2. Floor slab 
3. Frame - All timber must be FSC (in accordance with LBC requirements) - 1 merit
4. Wall 
5. Roof 
6. Drainage 
7. Window 
8. Insulation - All insulation must hold an ecolabel recognised by the NZGBC - 1 merit
9. Ceiling 
10. Floor coverings - All timber flooring to be recycled and all carpet and vinyl to hold an eco-label recognised by the NZGBC
11. Applied Coatings - all applied coatings must hold an eco-label recognised by the NZGBC - 1 merit
12. Joinery 
13. External decking - All timber must be FSC (in accordance with LBC requirements) - 1 merit

In reality we will probably end up targeting a lot more merits in a lot of different categories as we go through the process of documenting the Design of the house. For example we have used Firth's Declare concrete on our driveway - so that is 0.25 merits (which actually isn't covered in the above list) and we will also be using Firth's Declare concrete for the foundation and floor slab. 

MAT-2 VOCs & Toxic Materials

 

AIM

To encourage and recognise specification and use of interior finishes that reduce the detrimental impact on occupant health from products that emit pollutants.


CREDIT CRITERIA

(1) Where 50% of applied coatings meet the VOC limits as specified by a NZGBC recognised IAQ scheme or eco-label (or no applied coatings are used). -0.75 points
(2) Where 50% of adhesives and sealants meet the VOC limits as specified by a NZGBC recognised IAQ scheme or eco-label (or no adhesives and sealants are used). 0.75 points
(3) Where 50% of floor coverings meet the VOC limits as specified by a NZGBC recognised IAQ scheme or eco-label (or no floor coverings used). 0.75 points
(4) Where 50% of engineered wood meet the VOC limits as specified by a NZGBC recognised IAQ scheme or eco-label (or no engineered wood is used). 0.75 points

Design Rating Documentation

how the Living House does

The Living House has not yet fully defined all of the materials that will be going into the dwelling. However we will be targeting full points here as the Living Building Challenge also has requirements around the use of low VOC products. 

As we proceed with selecting and documenting products for use we will upload the relevant selections and documentation to this website.