Energirenovering af enfamiliehus opført efter BR-S85: Energirenovering af enfamiliehus opført efter BR-S85

Abstract

I dette projekt tages der udgangspunkt i en specifik ejendom der er opført i 1986-87 efter bygningsreglement BR 85-S. Rapportens målgruppe er således ejendommens ejer samt boligejer af samme type ejendom. Det vil gennem beregninger i Be18 blive belyst hvilke tiltag der skal fortages for at overholde henholdsvis renoveringsklasse 1 og 2, og hvilke tiltag der skal til for at overholder kravet til energirammen for nybyggeri for BR18. Indeklimaet for den nuværende bolig gennemgås og holdes op imod de oplevelser boligejer har af indeklimaet i dagligdagen. Gennem simuleringer i WUFI vil de fugttekniske forhold der gør sig gældende ved en efterisolering af loftkonstruktion blive anskueliggjort. Tilsvarende er der udført HEAT2 beregninger af samlingsdetalje i vinduesfals for at vurdere betydningen af ændret kuldebrosafbrydelse Det vil blive belyst, hvilke omkostninger de forskellige tiltag er forbundet med, og der diskuteres fordele samt eventuelle ulemper, der må forventes ved gennemførsel af de udvalgte tiltag. Der er søgt at anvende realistiske priser for de udvalgte renoveringstiltag via tilbud fra håndværksvirksomheder. Omkostninger til energirenovering sammenholdes med den værditilvækst, der af lokal ejendomsmægler, vurderes for området at være realistisk. Der diskuteres afslutningsvist, om nybyggeri kan være mere attraktivt for boligejer. Beregninger igennem projektet viser, at renoveringsklasse 2 og efterfølgende renoveringsklasse 1, kan overholdes ved gennemførsel af forholdsvist få tiltag, men at det ikke er rentabel i forhold til ejendommens værditilvækst. Ved gennemførsel af en omfattende totalrenovering, er det muligt at overholde energirammekravet for nybyggeri i BR18. En omfattende totalrenovering vil dog på samme måde ikke være rentabel for boligejer.

For this project the starting point is a specific property erected in 1986-87 following building regulations BR 85-S. Thus the focus of this report is the owner of the property and homeowners of the same type of house. Through calculations in Be18 it will be clarified which measures needs to be taken to comply with respectively renovation class 1 and 2 and which measures needs to be taken to comply with the demands of the energy frame for construction of new buildings. The indoor climate of the existing residence will be analysed and compared with the homeowners experiences of the indoor climate in the day to day situation. Through simulations in WUFI the conditions present after re-insulation of the attic construction will be made clear. Similarly, HEAT2 calculations of assembly detail between window and masonry have been carried out in order to assess the significance of alterations in the thermal bridge break. The costs associated with the various measures will be illuminated, and advantages and any disadvantages that may be expected when implementing the selected measures will be discussed. An attempt has been made to apply realistic prices for the selected renovation measures via offers from construction companies. The costs for energy renovation are compared with the added value of the property estimated by a local real estate broker, which is considered realistic for the area. Finally, it is discussed whether building a completely new house might be more attractive to the homeowners. Calculations through out the project have shown that renovation class 2 and subsequently renovation class 1 can be achieved when carrying out relatively few measures, but that it is not profitable in relation to the value added to the property. When carrying out a comprehensive total renovation, it is possible to comply with the energy framework requirement for new construction in BR18. However, a comprehensive complete renovation of the property will not be profitable for the homeowners in the same way.

A master programme thesis from Aalborg University

Energirenovering af enfamiliehus opført efter BR-S85: Energirenovering af enfamiliehus opført efter BR-S85

[Energy renovation of a property constructured according to the rules of BR-S85: Energy renovation of a property constructured according to the rules of BR-S85]