@bigbigsky8878 depends on how much debris there is and the consistency of it. Bricks will need removing at regular intervals, but don't remove too many that it will compromise the wall structure. To clean out the cavity it is cleared by hand or vacuum if the debris is fine.

@SandrKozlov Maybe the chalk like feeling is plasterboard dust. This may have gathered in the ducting if it wasn't protected between the MVHR first fix and second fix or if the unit was turned on before all the internal works on the propertyhad finished. Keep cleaning the filters and hopefully it will eventually improve.

@@completepreservation Thanks. Appreciate the comment.

Thank you for the comment Ross. The only signs above the floor was a slight deflection to the floor in one room. Luckily there were quite a few inspection hatches into the sub floor void so we were able to have a really good look around to see the full extent of the outbreak.

We have never seen any information or had any experience of a bad scent being released.

@@CkwalkerCoUk thanks for replying. Noted!

Saw ur vid with the death watch bettle

@@akleemasherriff8376 you don't want them things bud :)