Castleward: Cara Morgan 6yrs

The Listed Building owners forum Keeping the weather out Dermot Mac Randal

The inevitability of change Changing climate Changing needs Changing materials Changing society

Changing function

Changing materials decay and patina

Changing society changing values Donato Bramante 1502 Rome Tempietto

Before you change an historic building you must understand how it works Works be in accordance with the internationally recognised conservation principles as defined in the Burra Charter (1981), which has been adopted by ICOMOS (the International Council of Monuments and Sites) and is frequently utilised by Governments as a measure of best-practice conservation. Four principles of conservation are contained within the Burra Charter - plus the (equally) important principle of sustainable development. These principles are: Works be in accordance with the internationally recognised conservation principles as defined in the Burra Charter (1981), which has been adopted by ICOMOS (the International Council of Monuments and Sites) and is frequently utilised by Governments as a measure of best-practice conservation. Four principles of conservation are contained within the Burra Charter - plus the (equally) important principle of sustainable development. These principles are: Minimum Intervention – Only undertaking that intervention which is essential to preserve a structure or building, i.e. the minimum change to a historic building or structure in order to retain, whenever possible, the original fabric and character; Minimum Intervention – Only undertaking that intervention which is essential to preserve a structure or building, i.e. the minimum change to a historic building or structure in order to retain, whenever possible, the original fabric and character; Maximum Retention - The retention of the maximum amount of historic fabric; Maximum Retention - The retention of the maximum amount of historic fabric; Clarity - It should be possible to distinguish any new work from historic work; Clarity - It should be possible to distinguish any new work from historic work; Reversibility – Ensuring that any interventions to a historic structure can be undone in the future. Reversibility – Ensuring that any interventions to a historic structure can be undone in the future. An additional principle has also been added to the four above – An additional principle has also been added to the four above – Sustainability - The principle that any change proposed to a building, supports a sustainable future for the structure, or at least does not preclude this. Sustainability - The principle that any change proposed to a building, supports a sustainable future for the structure, or at least does not preclude this.

modern construction airtight, waterproof, rigid Breather felts, polyurethanes, sealants EPDM damp proof membranes, butyl rubber Polythene sheet, acrylic resin, mastics Silicone, polysulphide sealants, cement

traditional construction mud, wood, stone

Absorption Deflection Dispersal Evaporation Transpiration Durability, Sustainability, Performance

ROOF COVERING

ROOF CHIMNEYS & LEADWORK

ROOF GUTTERS & RAINWATER GOODS

WALLS BRICK

WALLS STONE

WALLS MORTAR

WALLS RENDER

WOOD

WOOD HEARTWOOD & SAPWOOD & DURABILITY

WOOD DECAY

PAINT LIME PUTTY, EARTH PIGMENTS, LINSEED OIL, MILK, (LEAD)

COPING WITH CHANGE

Castleward: Cara Morgan 6yrs