Fibre cement lining board and uses thereof

Abstract

The present invention relates in a first part to a fibre cement lining board for use as a replacement to building wrap which can be used to form a sub wall on the outer surface of a wall frame, and to building wall structures and methods of constructing buildings using these particular lining boards. The invention also relates to a new method of constructing framed dual skin walls using the lining boards, particularly brick or masonry veneer walls, and to the wall structures formed by that method.

1 . An outer frame lining board for use as a lining board for an outer frame structure comprising a fibre cement sheet having a thickness of more than 3 mm but less than 4 mm, and at least two major faces, the fibre cement which sheet is pre-sealed on at least one major face prior to installation. 
     
     
         2 . An outer frame lining board according to  claim 1  wherein the fibre cement sheet has a thickness of around 3.5 mm. 
     
     
         3 . An outer frame lining board according to  claim 1  wherein a surface of the outer frame lining board includes markings to assist with alignment of fasteners with standard stud spacings and the like and/or to facilitate easy and accurate cutting and sizing of the sheets. 
     
     
         4 . An outer frame lining board according to  claim 3  wherein the markings are integrally formed. 
     
     
         5 . An outer frame lining board according to  claim 1  wherein the board is distinguished at least in part by use of a coloured coating. 
     
     
         6 . A method of construction of a framed dual skin wall structure comprising:
 erecting an internal structural wall frame in situ;   applying a plurality of fibre cement lining boards which are pre-sealed on at least one major face prior to installation to fully cover and seal the outside of the wall frame excluding window and door openings and other designed penetrations to form a first inner wall skin,   applying a sealed roof or roof cover; and   closing off the designed penetrations to achieve a sufficiently sealed building envelope to achieve “lock up” prior to subsequently constructing a second outer wall skin in the form of an external block wall or external cladding.   
     
     
         7 . A method of construction of a framed wall structure according to  claim 6  wherein the wall structure is a brick or block style masonry veneer structure. 
     
     
         8 . A method of construction of a framed wall structure according to  claim 6  wherein the wall structure includes a second outer wall skin in the form of panellised or plank style cladding. 
     
     
         9 . A method of construction of a framed wall structure according to any one of  claim 6  using a face sealed fibre cement lining board with a thickness of more than 3 mm but less than 4 mm. 
     
     
         10 . (canceled) 
     
     
         11 . A framed dual skin wall structure comprising:
 an internal structural wall frame;   a plurality of fibre cement lining boards which are pre-sealed on at least one major face prior to installation fully covering and sealing the outside of the internal structural wall frame, excluding window and door openings and other designed penetrations, to form a first inner wall skin,   a sealed roof or roof cover over the internal structural wall frame; and the internal structural wall frame, first inner wall skin and sealed roof or roof cover being closed off at designed penetrations to achieve a sufficiently sealed building envelope; and a second outer wall skin around the internal structural wall frame and first inner wall skin, the being in the form of an external block wall or external cladding.   
     
     
         12 . A framed dual skin wall structure according to  claim 10  where at least fibre cement lining board has a thickness of more than 3 mm but less than 4 mm.