En miljö- och kostnadsinriktad granskning av takbeklädnad
Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
An environmental and cost evaluation on roof materials. (English)
Common roof materials in Sweden is of the materials roofing felt, copper, steel and clay tiles. The environmental impact differs a lot during a lifecycle for these products and this is something which is not informed well enough.
Copper roofs is one of the more aesthetic materials with maintenance, primarily by welding or brazing, and production developed over many centuries. Recently the use of energy has been reduced and taking care of by-products has been improved from the production of copper sheet. The opportunity to recycle is good since it’s almost possible to recycle all copper, this is very good from an environmental viewpoint. The use energy in production is low but the CO2-emissions is higher. Copper roofs have an estimated life-span of 100 years and only require maintenance caused by mechanical damage, because copper has a good natural protection. This results in a relatively low lifecycle cost.
Roofing felt is one of the cheaper alternatives, but it’s also the product which use most hazardous substances and finite raw materials. Maintenance is more extensive compared to other products, and hazardous substances needs to be used. Recycling opportunities are slim, these factors make roofing felt a less desirable material. The estimated life-span of roofing felt is 35 years and will require more maintenance when aging. During 100 years roofing felt will need to be replaced three times.
Production of clay tiles has been developed over many years, and emission of hazardous substances is now close to zero. Clay tiles is close be totally recyclable, thus clay tiles is one of the more environmental friendly material. It’s hard to estimate how long clay tiles last, but in the right conditions they last up to 100 years. In Sweden an estimated 65% of the tiles will have to be replaced during this period of time.
Tin roof, steel, yields some hazardous substances and other slag products in its production stage. But with good care environmental effects can be kept to a minimum. From a recycling point of view steel is good, which is a good environmental factor. Tin roofs have a high initial cost, and needs to be repainted four times over a 100 year span.
Place, publisher, year, edition, pages
2013. , 9 p.
Tak, Miljö, Livscykel, kostnad
IdentifiersURN: urn:nbn:se:kth:diva-133910OAI: oai:DiVA.org:kth-133910DiVA: diva2:663706
Subject / course
Master of Science in Engineering - Urban Management