Moderna krypgrundskonstruktioner
(2025) In TVBH-5000 VBFM01 20242Division of Building Physics
- Abstract
- The construction sector accounts for 22 percent of Sweden's greenhouse gas emissions, with the construction phase being the single most climate impacting stage. Despite reduced emissions from heating, emissions from the construction phase have remained unchanged. To achieve the goal of net-zero emissions by 2045, measures such as reduced material use and lowered climate impact from building materials have been proposed. Previous studies have investigated cross-laminated timber (CLT) as an alternative to concrete in slab-on-ground foundations, but other foundation designs may also influence the climate footprint. Conventional crawl spaces, which constitute 41 percent of the foundations in Sweden's low-rise residential housing stock, have... (More)
- The construction sector accounts for 22 percent of Sweden's greenhouse gas emissions, with the construction phase being the single most climate impacting stage. Despite reduced emissions from heating, emissions from the construction phase have remained unchanged. To achieve the goal of net-zero emissions by 2045, measures such as reduced material use and lowered climate impact from building materials have been proposed. Previous studies have investigated cross-laminated timber (CLT) as an alternative to concrete in slab-on-ground foundations, but other foundation designs may also influence the climate footprint. Conventional crawl spaces, which constitute 41 percent of the foundations in Sweden's low-rise residential housing stock, have well documented moisture issues. An increased use of crawl spaces could potentially reduce material consumption and concrete usage. The study examines the moisture safety and climate impact of modern crawl spaces foundations compared to slab-on-ground constructions. This is achieved by conduction heat and moisture calculations, as well as an evaluation of climate impact, which is then compared to slab-on-ground constructions. The results from the heat and moisture calculations indicate that the studied modern crawl spaces performance under expected moisture loads in normal conditions are moisture safe constructions in terms of relative humidity. Regarding the climate impact, the findings suggest that the studied modern crawl space constructions result in lower material-related climate impact in comparison to the slab-on-ground alternatives. (Less)
- Abstract (Swedish)
- Byggsektorn står för 22 procent av Sveriges utsläpp av växthusgaser, där byggskedet enskilt står för störst klimatpåverkan under en byggnads livscykel. Trots minskade utsläpp från uppvärmning har byggskedets utsläpp förblivit oförändrat. För att nå målet om nettonollutsläpp 2045 har det bland annat föreslagits minskad materialanvändning och lägre klimatpåverkan från byggmaterial. Det har också uppställts lagkrav på klimatdeklarationer vid nybyggnation. Andra studier har undersökt KL-trä som alternativ till betong i platta på mark, men även andra utformningar av grundkonstruktioner kan påverka klimatavtrycket. Konventionella krypgrunder, som utgör 41 procent av småhusbeståndets grunder, har väldokumenterade fuktproblem. Ökad användning av... (More)
- Byggsektorn står för 22 procent av Sveriges utsläpp av växthusgaser, där byggskedet enskilt står för störst klimatpåverkan under en byggnads livscykel. Trots minskade utsläpp från uppvärmning har byggskedets utsläpp förblivit oförändrat. För att nå målet om nettonollutsläpp 2045 har det bland annat föreslagits minskad materialanvändning och lägre klimatpåverkan från byggmaterial. Det har också uppställts lagkrav på klimatdeklarationer vid nybyggnation. Andra studier har undersökt KL-trä som alternativ till betong i platta på mark, men även andra utformningar av grundkonstruktioner kan påverka klimatavtrycket. Konventionella krypgrunder, som utgör 41 procent av småhusbeståndets grunder, har väldokumenterade fuktproblem. Ökad användning av krypgrunder skulle potentiellt kunna minska materialåtgång och användning av betong. Denna studie undersöker moderna krypgrundkonstruktioners fuktsäkerhet och dess klimatpåverkan i jämförelse med utformningar av platta på mark-konstruktioner. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9219839
- author
- Castlen, Simon LU
- supervisor
- organization
- alternative title
- Modern crawl space constructions
- course
- VBFM01 20242
- year
- 2025
- type
- H3 - Professional qualifications (4 Years - )
- subject
- keywords
- Krypgrund, Krypgrundskonstruktion, Fuktsäkerhet, Klimatpåverkan, WUFI Pro, WUFI Plus.
- publication/series
- TVBH-5000
- report number
- TVBH-5147
- other publication id
- ISRN LUTVDG/TVBH—25/5147 —SE(103)
- language
- Swedish
- additional info
- Examinator: Akram Abdul Hamid
- id
- 9219839
- date added to LUP
- 2026-01-23 15:05:39
- date last changed
- 2026-01-23 15:05:39
@misc{9219839,
abstract = {{The construction sector accounts for 22 percent of Sweden's greenhouse gas emissions, with the construction phase being the single most climate impacting stage. Despite reduced emissions from heating, emissions from the construction phase have remained unchanged. To achieve the goal of net-zero emissions by 2045, measures such as reduced material use and lowered climate impact from building materials have been proposed. Previous studies have investigated cross-laminated timber (CLT) as an alternative to concrete in slab-on-ground foundations, but other foundation designs may also influence the climate footprint. Conventional crawl spaces, which constitute 41 percent of the foundations in Sweden's low-rise residential housing stock, have well documented moisture issues. An increased use of crawl spaces could potentially reduce material consumption and concrete usage. The study examines the moisture safety and climate impact of modern crawl spaces foundations compared to slab-on-ground constructions. This is achieved by conduction heat and moisture calculations, as well as an evaluation of climate impact, which is then compared to slab-on-ground constructions. The results from the heat and moisture calculations indicate that the studied modern crawl spaces performance under expected moisture loads in normal conditions are moisture safe constructions in terms of relative humidity. Regarding the climate impact, the findings suggest that the studied modern crawl space constructions result in lower material-related climate impact in comparison to the slab-on-ground alternatives.}},
author = {{Castlen, Simon}},
language = {{swe}},
note = {{Student Paper}},
series = {{TVBH-5000}},
title = {{Moderna krypgrundskonstruktioner}},
year = {{2025}},
}