Reply To: New workshop building advice.

[Raymond AndersonParticipant @raymondanderson34407]

Technically the Wallplate should be bedded on to Lime [ although Mortar is most often used now.] Yes the DPC should be under the wallplate. If your bricklayer has all the bricks / blocks flat and even [ in relation to each other ] then you can omit the mortar bed just make sure the wallhead is clean and FLAT. Best to use drive in fixings for fixing the wallplate to the wallhead. I always use the Bitumen type DPC as it is better "self healing " around the fixing holes although even the polyethelyne type never gives any problems. just my preference.

DPC should always be a minimum of 150mm above finished ground level. the correct procedure is DPM from the floor should come up and also lap onto the wall head together with your DPC. the DPM / DPC should all be at finished floor level