Wall saw technology

The masonry sawing technique , also known as the masonry sawing method , is an approximately 100 year old technique for draining masonry when renovating a building. A subsequent structural seal , a horizontal barrier, is introduced into damp masonry using a special mobile or portable wall cutting machine to prevent further moisture penetration.

Procedure

In the masonry sawing process, the brick, concrete or quarry stone masonry is cut open in a joint in a one-meter section and PE fiberglass or stainless steel sheets are inserted with an overlap. Then the boards are wedged with plastic wedges in the saw cut and the saw cut is pressed with expanding mortar and a mortar pump. The mechanical lock prevents moisture from rising in the masonry in the long term. It may also be necessary to seal the floor, which can be connected to a film inserted in the saw slot in order to construct a kind of tub on which the inner floor can be built.

This horizontal barrier prevents moisture from rising further. So it is possible that the wet masonry will dry off. In order not to impair the load-bearing capacity of the building and to keep the settlement cracks as small as possible, plastic wedges with a compressive strength of 75 MPa are driven in at a distance of no more than 25 centimeters  . The kerf is then grouted on both sides with cement mortar. Plastic sleeves are installed between the wedges.

Then the cutting zone is pressed over the plastic grommets with a swellable injection mortar by a special machine in a force-locking manner using the printing process.

literature

• Frank Frössel: Brickwork drainage and cellar renovation . 3. Edition. Fraunhofer IRB, Stuttgart 2007, ISBN 978-3-8167-7164-7
• Frank Frössel: Lexicon of building sealing and cellar renovation . Baulino, Waldshut-Tiengen 2005, ISBN 3-938537-05-1
• Frank Frössel: Textbook of cellar renovation and sealing. 2nd Edition. Expert, Renningen 2007, ISBN 978-3-8169-2757-0