damp proofing question

my house has a conservatory on the back. Will I need to locate my damp proofing bricks before I higher the garden up or will it be ok to higher the patio to the highest step to the door.

Asked by Rebecca on 16th Apr 2019
Expert Trade Answers
"The building regulations, advise a minimum of 150mm from the ground level to the damp proof course. So I would not advise rising the garden level up unless you still have a 150mm difference from the ground level to the damp proof course.
If you are on about the air bricks these have to be below the damp proof course to allow the underfloor ventilation. I would recommend employing a qualified surveyor."
Answered on 16th Apr 2019 - Member since Jul 2014 - report
"Hi it all depends on how high you are going
It’s not good to be higher than your damp proof course
You may need to install a soak away or drainage

You don’t want any water falling back on to the house walls
As this can cause damp
Also anything under the paving may need to be tanked"
Answered on 16th Apr 2019 - Member since Mar 2019 - report
"You need to add a damp proofing paint to any timber that is being fitted to the house."
Answered on 11th Jul 2019 - Member since Feb 2019 - report
"Hi you should always have at least two courses from path height to your damp course to stop it rising over your damp level"
Answered on 16th May 2019 - Member since May 2019 - report
"Hi there you should always be 2 course off brick in height to be height from the ground to be on the damp course hope this is help help full"
Answered on 20th May 2019 - Member since Feb 2019 - report
"I would suggest you make sure but the damp proof coursing should be at door level so putting patio to the underside of your door should be fine."
Answered on 18th Feb 2020 - Member since Jan 2020 - report
"If you must raise external levels, first Locate damp proof course then dig a trench 500mm depth below damp. You will then need to use tanking against the wall then backfill with shingle or similar aggregate. Then install a channel drain against the full length of the wall, to the desired finished level. It can be done, but it must be done properly or you risk bridging the dpc"
Answered on 25th Jul 2019 - Member since Jun 2019 - report
"Yes you need to know where your damp proof is and rule of thumb is the Paving starts two bricks below."
Answered on 6th May 2020 - Member since Jan 2020 - report
"Hi there

I personally would locate the dpc first because it could affect your conservatory in the long run"
Answered on 20th Apr 2019 - Member since Feb 2019 - report
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