Homeowners: check your MuWi floor system
In the MuWi system, the floor consists of concrete joists, between which lightweight concrete filler elements are placed. Between 1951 and 1973, many floors built with this system were of poorer concrete quality.
Last May, at an elementary school in Rotterdam, a piece of concrete suddenly came loose from a floor. This piece of concrete fell down into a classroom. Fortunately, no one was present in the classroom at the time.
Because of this incident, we are asking homeowners in whose homes the MuWi system was used to check them out. These are homes built between 1951 and 1973. In the vast majority of cases, this system will not cause damage or problems. However, we do recommend that you check your floor just to be sure.
When should you check your floor?
It is wise to check your floor when the MuWi system is directly visible. You will then check to see if any cracks are visible. It is also wise to check your muwi system when it is above a suspended ceiling. You can then push one of the boards to the side and thus check what type of floor is there and whether any cracks are visible.
There is no need to check fixed ceilings. If ceilings have stucco or drywall, there is little risk of a chunk falling.
It is also not necessary to check crawl spaces. This is because no persons reside here.
Would you rather not check your floor yourself? Then you can contact a construction contractor.
Learn more
More information can be found in the attached TNO construction report. You can also find more information on the website of the rijksoverheid.