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Groundwork & Foundations

Front and rear block paving above DPC

Anonymous user 28/02/2024 - 3.37 PM

Hello, I’ve recently moved into a new property and have noticed some quite minor rising damp issues to the reveal of the front door and a part of the rear wall. I obviously needs to address this problem quickly. What I believe it to be is the block paving in the front garden is butted right up to the property wall and I’m finding it difficult to locate the DPC so I’m guessing it’s below the block paving. From what I’m reading this is a no go. The back garden paving is on quite a steep slope running towards the house and again the DPC is below the paving in parts. What would be the best thing to do in this situation just to remedy the breach of the DPC not necessarily to have a complete make over of the rear garden or to dig up the block paving. Any help would be greatly appreciated as I know how serious this can become. Thanks

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4 Answers

Anonymous user

First port of call is to lift up the first few rows of pavers and locate DPC, if as you said it is below then the most realistic solution would be to install acco drains and have them tapped into your surface water drainage- this will collect any water that runs down towards the building and dispense it accordingly

Answered23 April 2018

Paved In Stone

Rating: 5 out of 5

Melksham

To really satisfy the dpc breach you'll need to remove blocks a meter back from the building. Then excavate a footing approximately 450mm from the building and 300mm deep. it's important to remove all material, blocks,sand and hardcore sub base so that you should end up with 4 bricks exposed below dpc. Next you'll need to make some concrete and fill the trench upto the bottom of the third brick. . Next is build a single course of wall 6 inches away from the building, preferably concrete block, upto the current drive finish height. Now you have protected the dpc and ensured airflow. Next job is install aco drains on the drive side of your new wall and ideally feed them into an available down pipe. Now you can relay the block paving upto the aco drains and the problem is solved and will last.

Answered23 January 2019

Star Building Services LTD

Rating: 5 out of 5

Harlow

The building regulations say, the paving must be finished below DPS 150mm (two brick courses). If you install channel drains then you need to leave at least 4 inches empty space between the wall and other barriers installed.

Answered28 April 2018

Anonymous user

Take out a couple of rows of paving instal acco channel drains connect them to your drainage this will collect any water flow and get rid of it

Answered20 October 2018