Damp Proof Course And Finished Floor Level

Have recently removed the skirting and 2ft of plaster to reveal brick work and investigate further the dpc orginal slate is 1 course above the finished internal floor level. A damp proof course is a barrier usually formed by a membrane built into the walls of a property typically 150 mm above ground level to prevent damp rising through the walls. The selection of materials for the damp proof course and its various methods of applications in buildings is discussed.

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Rising damp and some penetrating damp can be caused by faults to or the absence of a damp proof course dpc or damp proof membrane dpm.

Damp proof course and finished floor level.

It is a requirement that the dpc is at least 150mm above ground level. Its is quite usual to have this situation or if the finished floor level is a bit lower some of the vertical dpm exposed. The hb coating offers a long lasting high gloss grey finish which protects the damp proof membrane and gives an aesthetically pleasing finish to the floor. By simply lowering external ground levels this will allow wall base evaporation to help control rising dampness.

The below diagram shows what bridging of the damp proof course looks like. If the moisture is entering the garage through the walls you may wish to use the above system in combination with a tanking slurry on the wall. Depending on the extent of the rising damp this can be a more costly and extensive job to repair. The damp proofing specialist we just had in was sucking air through his teeth which has made me wonder.

The damp proof course dpc is generally applied at basement levels which restricts the movement of moisture through walls and floors. Finished floor level same as ground level. Houses are usually built with a damp proof course dpc just above floor level to prevent moisture rising up but if this has failed or the property did not have a dpc then rising damp can occur. Symptoms appear as localized dampness in linear or patch form or widespread dampness which is highlighted in the lower sections of internal walls and the internal face of external walls.

The damp proof course is positioned level with the underside of the floor to form an impermeable barrier. External ground levels ideally need to be lowered 150mm below the damp proof course or the internal flooring. Apologies i m not a builder just a desperate homeowner. This would be covered by the skirting boards etc.

Have had water staining and mould on the internal wall for some time. The floor can be wherever you want it obviously even well below ground.

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