It's raining: can Dynacem be used? Do I have to wait until dry weather? Should I take any special measures?

Holes can be wet or dry inside (wet or dry are equally good) in the moment of filling, but any water standing inside the hole in the moment of filling is detrimental (can cause blowout or decrease the pressure).

Dynacem mix has a liquid state within first 1 (summer) to 5 (below zero deg C) hours.

Intensive rain (or streams flowing over the holes) can wash the liquid mix out off the hole. Light rain can only washouts first 1 or 2 cm of the mix so it is not important. Long light rainfall can however cause powerful stream in some locations depending on the shape of the terrain - it is not acceptable if the stream is flowing over the holes. In majority of cases european rain is not dangerous or light plastic foil can protect the holes.

Holes can be immersed immediately after filling if the water is not moving.