Wet Exterior Wall

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Wet Exterior Wall

Post by Cracky » Thu Apr 12, 2018 3:38 pm

Hi all,

Can I get your thoughts on what's causing this exterior wall to be wet please? The mortar between the coping stones definitely needs re-pointing but would that be enough to cause this? Shouldn't there be there some sort of damp course and cavity tray under the stones to stop this even if the pointing is a bit iffy? I've also read that there should be weep holes along the cavity tray but there isn't...

The house is only 7 years old but i'm reluctant to get the LABC involved unless it's going to be really expensive to sort (there's a £1000 excess!).

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Re: Wet Exterior Wall

Post by wine~o » Thu Apr 12, 2018 5:06 pm


Damp on external walls aren't necessarily a problem. Yours does seem to run parallel to the roof line. More pics please, of the roof tiles at 90 degrees from that pic (move left) and a slightly zoomed out pic from the same direction.

Also does this wall face south/south-west/ west perchance ?
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Re: Wet Exterior Wall

Post by wes56 » Thu Apr 12, 2018 6:55 pm

if the coping stonespointing is shot then its got to be well raked out and renewed.
some pointing on the wall looks bad.

google parapet wall coping stone details and see if your coping stones are similar with throatings.
google abutment cavity trays and see how the parapet is constructed.
photos showing the roof and parapet and close ups of the parapet flashing will .
the cavity insulation could be wet.
any damp signs inside the house?

whats the down pipe on the right draining?

for various reasons, what you show is dead common nowadays on new builds

you mean your building insurance has a £1000 exces?
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