Planning of renovation works for external basement waterproofing

The WTA leaflet 4 – 6 "Subsequent waterproofing of earth-contacting building structures" provides helpful information for the evaluation of damages, the set-up of the waterproofing concept and the description of subsequent waterproofing works. The concept of waterproofing is based on the results of in-situ checks and laboratory tests with comprehensive key parameters.

For the planning of subsequent exterior waterproofing of basements the photos relative to nature and extent of existing damages, the special features of the building, the construction of the foundation walls as well as the existing waterproofing are significant. The specific water load and the load-bearing capacity of masonry must be evaluated, too. Knowledge about type of existing and planned use of damaged building structures is important for the expenditure of renovation measures.

Which regulations are existing?

The WTA (Scientific and Technical Working Group for Building Conservation and Monument Preservation, Germany) sets itself the goal of research and practice on the fields of building conservation and preservation. Its main activities are to analyse practical experiences on job sites, to accelerate the use of new acknowledgment and modern technologies as well as to issue guidelines for the renovation of buildings and the preservation of historical buildings.

Following regulations / WTA leaflets are to be complied with, when renovating moist and salt-loaded basement rooms:

2 - 9   Damp-proof render systems

4 - 4   Injection of masonries against capillary rising damp

4 - 5   Examination of masonry brickwork – Diagnostics of masonry

4 - 6   Waterproofing of earth-contacting building parts

4 - 7   Subsequent mechanical damp-proof barrier

4 - 11 Measurement of humidity in mineral building parts