37º IAHS World Congress on Housing: - Universidad de Cantabria

XXXVII <strong>IAHS</strong><strong>World</strong> <strong>Congress</strong> on HousingOctober 26 – 29, 2010, Santander, SpainCODE: 704BUILDING ENVELOPE REHABILITATION COSTS:DETERMINATION AND VARIABILITYCarina Isabel Pereira de Sousa (1); João Carlos Gonçalves Lanzinha (2)(1) Master Degree in Civil Engineering, C-Made Centre of Materials and Building Technologies, CivilEngineering and Architecture Department, Faculty of Engineering, University of Beira Interior, Calçada Fontedo Lameiro, Covilhã, Portugal, Tel. +351 968259303e-mail: carinaipsousa@hotmail.com(2) Doctorate Degree, C-Made Centre of Materials and Building Technologies, Civil Engineering andArchitecture Department, Faculty of Engineering, University of Beira Interior, Calçada Fonte do Lameiro,Covilhã, Portugal Tel. +351 275 329 722; fax: +351 275 329 969e-mail: joao.lanzinha@ubi.ptKeywords: Rehabilitation, building envelope, costs.AbstractIn recent decades, there has been a great deal of investment in Portugal in the construction ofnew buildings to the detriment of the rehabilitation of existing ones. As a result, the historiccentres of towns and cities are deteriorating, while their suburbs are spreading. One of themain problems affecting the rehabilitation of residential buildings is that it is extremelydifficult to accurately estimate the costs involved. Although there are established methods(and technical documents available) to aid the costing of new buildings, there is a lack ofofficial information about the costs of rehabilitation work, particularly as regards the externalenvelope of buildings.This article demonstrates how to determine rehabilitation costs (with particular emphasis onthe envelope of residential buildings) by gathering information from specialized companies,assessing price variability and consulting databases of rehabilitation costs from othercountries. It also presents some examples of costing for particular rehabilitation jobs.37º <strong>IAHS</strong> <strong>World</strong> <strong>Congress</strong> On Housing Science 265