Damp rising as far as the dpc

Patio flagstones (slabs), concrete flags, stone flags including yorkstone and imported flagstones.
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joella
Posts: 15
Joined: Tue Aug 28, 2007 9:33 pm
Location: bath, uk

Post: # 24208Post joella

Hi guys,

I finished my patio a couple of months ago...you may remember as i made a couple of posts at the time.
I used Rompox for the pointing, including the gap bettween the flags and the house.
It seems to soak up the waterr when it rains, and then that transfers to the brick on the house.
Now i am well below the DPC, but the water seems to travel up the brick as far as the DPC (where the black plastic stuff is bettween the bricks.
Is this ok, or do i need to do something about this?

lutonlagerlout
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Location: bedfordshire

Post: # 24210Post lutonlagerlout

thats what the DPC is there for
ideally water should have a slight fall away from the house,about 1:60 ,but sound slike the dpc is doing its job
cheers LLL :)
"what,you want paying today??"

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joella
Posts: 15
Joined: Tue Aug 28, 2007 9:33 pm
Location: bath, uk

Post: # 24213Post joella

Yeah it does have a slight fall away, but i think the rompox absorbs some of it before it falls away and then transfers it to the brickwork.

I guess i just wanted to know whether replacing the joint by the wall with some mortar rather than rompox would be necessary. From your comment, it doesnt sound like it is.

thanks
Joel

matt h
Posts: 607
Joined: Mon Jul 09, 2007 11:14 pm
Location: gosport

Post: # 24236Post matt h

check your cavities and ensure they are not blocked above dpc, and if they are clear your dpc is ok, and water will not penetrate higher.
general builder, maintenance engineer, gas and plumbing installations, extensions etc

James.Q
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Joined: Tue Sep 25, 2007 7:20 pm
Location: darwen
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Post: # 24247Post James.Q

below your dpc level are the bricks engineering ? if not i would treat with a sealent but only when totaly dry . done lots of jobs where frost has blown the face off and had to replace.
One of the symptoms of an approaching nervous breakdown is the belief that one's work is terribly important.

lutonlagerlout
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Posts: 15184
Joined: Fri Aug 04, 2006 12:20 am
Location: bedfordshire

Post: # 24248Post lutonlagerlout

sealing water in compounds the problem james, a brick actually lets water evaporate over time
if you seal it the water stays in there and then freezes and blows the brick.
make sure your gutters dont leak joel,thats a major cause IME
cheers LLL :)
"what,you want paying today??"

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James.Q
Posts: 368
Joined: Tue Sep 25, 2007 7:20 pm
Location: darwen
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Post: # 24251Post James.Q

LLL please read my post . Not trying to teach you to suck eggs
One of the symptoms of an approaching nervous breakdown is the belief that one's work is terribly important.

lutonlagerlout
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Posts: 15184
Joined: Fri Aug 04, 2006 12:20 am
Location: bedfordshire

Post: # 24256Post lutonlagerlout

i stand corrected
but i am shocked after being taught 1 way for 20 years i.e. high cement content,water seal etc.
in the last 5 yearsthe latest thinking suggests that that type of remedial work does more harm than good
i shudder when i think of all the houses i have pointed in 3:1 mortar and painted with waterseal
:O :O :O
LLL
"what,you want paying today??"

YOUR TEXT GOES HERE

matt h
Posts: 607
Joined: Mon Jul 09, 2007 11:14 pm
Location: gosport

Post: # 24301Post matt h

lutonlagerlout wrote:i stand corrected
but i am shocked after being taught 1 way for 20 years i.e. high cement content,water seal etc.
in the last 5 yearsthe latest thinking suggests that that type of remedial work does more harm than good
i shudder when i think of all the houses i have pointed in 3:1 mortar and painted with waterseal
:O :O :O
LLL
same as that, but cant say that any of mine have shown any problems... yet... :p
general builder, maintenance engineer, gas and plumbing installations, extensions etc

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