Terra Lana Underfloor Insulation has been appraised as a thermal insulating material for suspended timber-framed floors and timber-framed mid-floors in new domestic and commercial buildings.

Terra Lana Underfloor Insulation is suitable for use under floors which have an enclosed perimeter foundation as defined in NZS 4246. It is also suitable for use where the subfloor area is not enclosed and is subject to wind, such as in open raised floors and pole houses.

• Retrofit insulation for existing suspended floors: Terra Lana Underfloor wool insulation is designed to fill existing underfloor cavities 
• Midfloor — installed between floors where an R-value needs to be achieved (such as above a garage).
• Installed from below
• The insulation’s rigidity allows it to be friction-fitted between joists and is stapled through the lower edges onto the joists to prevent dislodging

• Must be installed in accordance with the Installation Guide and Terra Lana technical literature
• Suspended floors, installed from the underside where there is a minimum 350mm clearance between the bearer and ground.
• For new builds see Drop-In Floor Insulation
• Must be stored under cover and in dry conditions, and in a way that avoids excessive compression

In the opinion of BRANZ, Terra Lana Wool Insulation, if designed, used, installed and maintained in accordance with the statements and conditions of Appraisal 1164, will meet or contribute to meeting the following provisions of the NZBC:

• Clause B2 DURABILITY: Performance B2.3.1 (b) not less than 15 years, B2.3.1 (c) 5 years, and
• B2.3.2. Terra Lana Underfloor Insulation meets these requirements.
• Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Terra Lana Underfloor Insulation meets this requirement.
• Clause H1 ENERGY EFFICIENCY: Performance H1.3.1 (a) and H1.3.2 E. Terra Lana Underfloor Insulation contributes to meeting these requirements.

• 50 year warranty — Terra Lana wool insulation comes with a 50 year warranty to meet the durability requirements of the New Zealand Building Code. The combination of New Zealand wool and thermal bonding technology using polyester creates a robust, structurally stable product that will never slump nor lose its loft over the lifetime of the building. 
• Recyclable — As part of Terra Lana's commitment to zero waste, Terra Lana insulation offcuts can be returned to the factory in Christchurch, and are recycled into more insulation.
• Declare Red List Free — certified toxin free