Advice around my DPC

[sp0001]

Hello,

I am hope someone can help me.
I am currently having an extension built on my property. The property has a block and beam floor and the brick work and block work are currently at about 1 meter high. Over the weekend I have been measuring out in the garden for the patio etc.. and noticed that the DPC has been installed a brick higher in the new extension compared to the existing property (the existing property was built in 1990 and you can clearly see the DPC).
What I am considered about is dampness bridging the different DPC at different heights. Why do you think this was done? Any thoughts or advice would be greatly appreciated.

Thanks Sp001

 

[tony1851]

As long as the new DPC is turned down and lapped over the existing DPC, there shouldn't be a problem.

 

[^woody^]

The DPC should not normally be higher than the floor level

Presumably the new floor is level with the existing floor, so potentially there could be a band of wall below the DPC and above the floor surface which could be damp.

There are times when a cavity tray is formed at ground level and yes, in this case the internal DPC would be higher, but this would be a specialist design to overcome a specific problem

 

[sp0001]

Thank you for the replies, just to confirm the new DPC is at floor level while the house DPC was a brick lower. Not sure if this makes a difference but my house floor is block and beam with a T&G wood floor. While the extension is a block and beam floor with a concrete finish, could this be the reason ?

cheers sp001

 

[dormermike]

The DPC should not normally be higher than the floor level

Presumably the new floor is level with the existing floor, so potentially there could be a band of wall below the DPC and above the floor surface which could be damp.

Thats whats happening in my house. What would the fix be please woodie?

 

[^woody^]

Thank you for the replies, just to confirm the new DPC is at floor level while the house DPC was a brick lower.

Thats fine then. DPCs do not have to be level, its the relationship between the DPC level and floor level. DPCs can be lower than the floor level

 

[^woody^]

Thats whats happening in my house. What would the fix be please woodie?

You may want to start a new thread and post a picture or two.

By "happening" do you mean this has been like it for a long time, in which case there is a problem? Or is it being built now?

 

[dormermike]

Thats whats happening in my house. What would the fix be please woodie?

You may want to start a new thread and post a picture or two.

By "happening" do you mean this has been like it for a long time, in which case there is a problem? Or is it being built now?

Sorry, didnt want to hijack but my thread had no response [url]//www.diynot.com/forums/building/solid-concrete-floor-15-below-dpc-damp.367953/[/url]

Its an ongoing issue, present since i have had the house. Wall floor junction damp due to wet bricks below DPC. Thanks