Material Alterations - Structural Forms.

Material alteration is intended to cover substantial works to existing buildings that were designed and constructed prior to the changes in Approved  Document Part L.

For example, should major works be required to roof or wall cladding, it will be necessary to provide insulation to achieve the U value of a new building. Following on from the latter eventuality will be the need to make provision for improving the building’s air-tightness.

The replacement of doors and windows will also entail the use of products that meet the requirements of new buildings, as too will the installation of new heating systems, for example.

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