Branz logo Petrapanel-black

Mineral Plaster Technology PETRAPANEL AAC System

Branz logo Petrapanel-black

PETRAPANEL AAC plaster system for Autoclaved Aerated Concrete (A.A.C.) is a three-coat plaster system incorporating an embedded fiberglass reinforcing mesh and selected finish coats.  The main plaster component of the system is MPT BONDCOAT, which provides a tough, durable and crack-resistant base coat.  The breathable characteristics of all MPT plasters complement the natural breathability of AAC resulting in a totally vapour-permeable system.  Petrapanel AAC panels are available in thicknesses of 50mm and 75mm.

  • AAC is supplied to the market in two forms; panel and block.
  • A full fiberglass mesh layer is embedded into the BONDCOAT layer on both forms of AAC substrate.
  • Strips of reinforced fiberglass mesh are installed diagonally across the corners of all joinery openings to combat the stresses typically found at these points.
  • MPT plasters can be applied manually or by plaster pump.

The benefits of the PETRAPANEL AAC system are:

  • Excellent sound insulation
  • Excellent thermal insulation
  • Excellent fire resistance
  • Vapour-permeability
  • Deep reveals
  • Available as open or closed cavity systems including our proprietary MPT vents

Available in 50mm or 75mm thick panels; and various depths of AAC block.

The Petrapanel AAC panel system is BRANZ Appraised (1111[2020]).  The Petrapanel AAC block system is subject to specific design engineering.

The MPT Petrapanel AAC System Technical Manual should be consulted for full system specifications.  This is available from MPT by email or on USB drive.

Remove any dust or site dirt.  Prime all exposed reinforcing steel using a zinc primer.  Set out panels horizontally, ensuring that they are level and flush.  Panels must be glued on all edges with Sabre-Fix PU adhesive and screw fixed in accordance with the MPT Petrapanel AAC System Technical Manual and accompanying detail drawings.

Where a closed-cavity system is used, MPT Cavity Vents must be installed at 1200mm centres along the lower edge of the walls.

All flashings and pre-meshed PVC extrusions must be installed in accordance with the MPT Petrapanel AAC System Technical Manual.  This is available by email, or on a USB drive free of charge.

Where specified in the MPT Petrapanel AAC System Technical Manual, PVC flashings and extrusions must be glued in place with Sabre-fix PS Builder's adhesive and sealed with Sabre-Seal MS sealer. 

All external corners are reinforced with pre-meshed corner beads and all window heads have drip edges as standard.  

Petrapanel AAC screws are 5mm longer than other such systems to ensure that frame penetration meets the NZ Building Code requirements.

The plaster system is made up of MPT BONDCOAT with a fibreglass reinforcing mesh embedded into it, followed by an MPT SKIMCOAT levelling layer, then either an MPT FLOATCOAT or MPT ADOBECOAT finishing coat depending on the desired finish.

Full specifications are available in the MPT Petrapanel AAC System Technical Manual which is available on request by email or on USB drive.

All Plaster must be over coated with 1 coat of efflorescence-blocking primer and 2 coats of high build or elastomeric paint.  LRV (Light reflectance value) for all paint must be 40% or greater.

All plaster finishes and/or texture and colour samples must be signed off by the architect or the owner prior to application.

Mineral Plaster Technology recommends that all Mineral Plaster Technology products are applied by a Mineral Plaster Technology approved applicator to ensure correct application and integrity of the system for warranty requirements.


Select Category

  • - pdf version
  • - dwg version
  • - dwg compatibility version

  • MPT Petrapanel Full System
  • Sheet List
  • MPT Petrapanel System

  • Vertical Expansion Joint
  • Vertical Expansion Joint to Brick
  • Vertical Expansion Joint to Weatherboard
  • Vertical Expansion Joint to Concrete Block
  • Vertical Expansion Joint to Stone Veneer
  • Horizontal Expansion Joint – 2 Storeys or less
  • Horizontal Expansion Joint to Stone Veneer
  • Horizontal Expansion Joint – Inter-storey Drained Cavity – 2 Storeys or greater
  • Horizontal Expansion Joint to Weatherboard
  • Horizontal Expansion Joint to Metal Profile
  • Horizontal Expansion Joint – AAC to Brick Junction
  • Horizontal Expansion Joint – Meshclad Overlap to Masonry

  • Soffit – Flush Eaves Gutter
  • Soffit – Horizontal Detail
  • Soffit – Slope Soffit with Concealed Flashing
  • Soffit – Reverse Raked – Option 2
  • Soffit – Metal Profile Barge Flashing
  • Soffit – Edge Detail
  • Roof – Abutment Detail – Sloped Roof
  • Roof – Abutment Detail – Flat Roof
  • Roof – Stopend Flashing Junction – Roof to Wall

  • Batten Layout Around Windows
  • Framing Layout Timber Framing With Battens
  • Batten Setouts
  • AAC Panel Layout

  • Aluminium Head Detail
  • Aluminium Jamb Detail
  • Aluminium Sill Detail
  • Jamb Sill Junction with Corner Soaker
  • Sill Trim – Bottom Corner Detail
  • Flexible Air Seal Detail

  • External Corner – Square
  • External Corner – Round
  • External Corner – Junction
  • External Corner – External Corner with Stone Veneer
  • External Corner – External Corner with Vertical Metal Cladding
  • External Corner – Weatherboard Junction
  • Internal Corner – Square
  • Internal Corner – Junction
  • Internal Corner – Internal Corner with W Flashing and Weatherboard
  • Internal Corner – Internal Corner with Vertical Metal Flashing
  • Internal Corner – Junction to Concrete Block
  • Internal Corner – AAC to Weatherboard Junction

  • Cantilevered Joists Detail
  • Pergola and Deck Wall Plate
  • Cantilevered Deck Joist

  • Fro Down Pipes, etc

  • Timber Floor
  • Timber Floor – Option 2
  • Concrete Slab
  • Rebated Concrete Slab – Vented
  • Bottom Plate

  • Window Head to Jamb – Preparation
  • Window Head to Jamb
  • Window Head to Jamb

  • Typical Meter Box Installation Setup
  • Typical Meter Box Installation
  • Meter Box 3D View
  • Wall Section

  • Enclosed Deck Balustrade to Wall Junction
  • Capped Flashing Cavity System
  • Parapet Balustrade Wall Timber Framing
  • Parapet Balustrade Wall Batten Layout
  • Parapet Balustrade Wall Primary Flashing
  • Parapet Balustrade Wall Secondary Flashing
  • Parapet Balustrade Wall Secondary Flashing
  • Sloped Flashing Cavity System
  • Plastered Capping to Parapets or Balustrades CW Handrail
  • Plastered Capping to Parapets or Balustrades

  • Pipe Penetration Cavity
  • Typical Pipe Penetration


Contact Joe Paul

+64 9 447 3918

Talk to us about your project
0800 25 23 678

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