Influence of cracks on moisture conditions in façades with water-repellent treatments
(1999) In International Journal for Restoration 5(5). p.499-521- Abstract
- A water-repellent treatment normally works well if there are no cracks in the façade. The occurrence of cracks, however, may allow water to penetrate, resulting in significant moisture. How wide a crack may be tolerated is not known. A limit of 0,3 mm is often allowed. To illuminate this question and create a better basis for evaluating an acceptable width for a crack, this paper will present both a theoretical review and laboratory studies. A simple method for testing the effectiveness of the various treatments will be reviewed. Results from laboratory studies indicate that the practical contact angle is less than has usually been assumed. For most treaments this angle was 110 degrees - 120 degrees. In practical terms the acceptable width... (More)
- A water-repellent treatment normally works well if there are no cracks in the façade. The occurrence of cracks, however, may allow water to penetrate, resulting in significant moisture. How wide a crack may be tolerated is not known. A limit of 0,3 mm is often allowed. To illuminate this question and create a better basis for evaluating an acceptable width for a crack, this paper will present both a theoretical review and laboratory studies. A simple method for testing the effectiveness of the various treatments will be reviewed. Results from laboratory studies indicate that the practical contact angle is less than has usually been assumed. For most treaments this angle was 110 degrees - 120 degrees. In practical terms the acceptable width of a crack will be dependent upon exposure to wind and driving rain as well as wall construction. In areas of heavy wind and rain exposure, 0,1 mm would seem to be the maximum acceptable width for most treatment compounds. In less exposed locations, however, a crack witdh of 0,3mm is often acceptable. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1496852
- author
- Sandin, Kenneth LU
- organization
- publishing date
- 1999
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Building, Façade, Exterior, Crack, Humidity, Insulation, Hydrophobization, Test, Analysis
- in
- International Journal for Restoration
- volume
- 5
- issue
- 5
- pages
- 499 - 521
- ISSN
- 0947-4498
- language
- English
- LU publication?
- yes
- id
- e5b6c019-d511-401b-b608-38d340bc8b91 (old id 1496852)
- date added to LUP
- 2016-04-04 09:23:59
- date last changed
- 2018-11-21 20:52:49
@article{e5b6c019-d511-401b-b608-38d340bc8b91, abstract = {{A water-repellent treatment normally works well if there are no cracks in the façade. The occurrence of cracks, however, may allow water to penetrate, resulting in significant moisture. How wide a crack may be tolerated is not known. A limit of 0,3 mm is often allowed. To illuminate this question and create a better basis for evaluating an acceptable width for a crack, this paper will present both a theoretical review and laboratory studies. A simple method for testing the effectiveness of the various treatments will be reviewed. Results from laboratory studies indicate that the practical contact angle is less than has usually been assumed. For most treaments this angle was 110 degrees - 120 degrees. In practical terms the acceptable width of a crack will be dependent upon exposure to wind and driving rain as well as wall construction. In areas of heavy wind and rain exposure, 0,1 mm would seem to be the maximum acceptable width for most treatment compounds. In less exposed locations, however, a crack witdh of 0,3mm is often acceptable.}}, author = {{Sandin, Kenneth}}, issn = {{0947-4498}}, keywords = {{Building; Façade; Exterior; Crack; Humidity; Insulation; Hydrophobization; Test; Analysis}}, language = {{eng}}, number = {{5}}, pages = {{499--521}}, series = {{International Journal for Restoration}}, title = {{Influence of cracks on moisture conditions in façades with water-repellent treatments}}, volume = {{5}}, year = {{1999}}, }