Dpm as dpc
Posted 21 June 2010 - 10:18 PM
I am new here and have a question that might seem silly, why do we have to have a dpc and dpm on inner walls, why not just dpm as this will stop damp rising
Posted 22 June 2010 - 09:58 PM
Posted 26 June 2010 - 09:14 AM
When a Dpm is put in, it is normally tied into the Dpc course on the inner wall, sandwiched between courses and Dpc with mortar, in this case why not just use Dpm and omit th Dpc as Dpm will serve both purposes. I hope that is a little clearer.
In reply to Laurence (thanks for reply)
Dpc and Dpm are normally sandwiched with mortar on bricks/blocks, so Dpm would not get pierced by any hard material in this case, I have been researching this, and so far the best reason it is not used in the way I have layed out is that Dpm is plastic and will cause a slip plain, whilst Dpc is keyed for his purpose, but as I have all ready said they are normally tied in together so there would still be a slip plain.
My thinking is that it can be used in this way and that putting both Dpm and Dpc in is a throwback, if any one knows of a good reason why this is not the case (apart from required by Building Control) please let me know
Posted 26 June 2010 - 11:58 AM
I've also seen references to "high load DPC". I thought this might be for retaining walls but the instructions said it wasn't to be used for that.
Posted 26 June 2010 - 12:34 PM
Posted 28 July 2010 - 05:18 PM
But- theres always someone who cant conform !!