CertClad | Bevelback Cavity System | Radiata Pine | Installation Manual
© ITI Timspec Ltd | BC-RP-IM-V5 | CertClad is a registered Trademark of ITI Timspec Ltd
Last Updated March 2021
5
SCOPE
1.1 INTENDED USE
This Bevelback Weatherboard Cavity System has been designed for use as cladding for residential and
light commercial buildings. It is
suitable for buildings with a ‘Risk Score’ of 0 - 20 Calculated in accordance
with New Zealand Building Code (NZBC) Clause E2/AS1 Table 1 and Wind Zones up to and including extra
high.
1.2 VALIDITY
Cerclad is only valid when all products in the weatherboard system are as listed in the product certificate
and in this manual. This is to ensure that all products meet the requirements of Certclad and are installed
in the correct manner.
1.3 PERFORMANCE
When installed and maintained as specified in this manual and the work is done by a qualified tradesman
using accepted trade practices, it will meet the applicable sections of the following requirements of the
NZBC (New Zealand Building Code):
•
B1 Structure
•
B2 Durability
•
E2 External Moisture
•
F2 Hazardous Building Materials
1.4 LIFESPAN
1.4.1 SERVICEABLE LIFE
ITI Timspec Radiata Pine is warranted for between 15
– 40 years depending on coating selected.
This serviceable life is subject to the coating and maintenance requirements below. More
importantly
, some
timber boards may require replacement over the lifetime of the cladding as part of normal maintenance.
1.4.2 COATING REQUIREMENTS
For H3.1 or H3.2 treated Radiata Pine with a dressed surface, all faces (hidden and exposed) must be
paint finished, consisting of two coats of an approved
primer and all exposed faces coated with a further
two coats of a suitable topcoat, refer to chapter 4.3 (Priming and Sealing, page 7) and 6.2.4 (Coating, page
8) for more detail.
1.4.3 MAINTENANCE REQUIREMENTS
When a coating is applied, periodic maintenance and recoating is required to ensure the integrity of the
coating is sustained. This will generally mean applying another exterior coat every 10 years dependent on
the coating used and building location after washing and maintenance.
Please refer to the On-Going Maintenance section 12 (page 18) for more information about the required
maintenance.
