Porch damp please help

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Having a double wall is unnecessary & no cavity doesn't help things, probably no dpc either.
Ventilation usually helps, but in your case I don't think it will.

 

Condensation sounds like. Do walls get very wet in winter?

 

Clue is in the 4th sentence !

 

Not as clever as you! lol

 

Already figured that out

 

lol..............u swine!!

 

What area of the country are you?

 

Been thinking, a few 'Dry Rods' might work if there no damp course, it will stop moisture rising.

http://www.dryrods.com/

Wickes sell boxes of 10's

http://www.wickes.co.uk/Dryrod-Damp-Proof-Course-Rods-180mm-Pack-10/p/133882

 

More details, now that changes things.

Any gutter on porch,if not water can be thrown back against wall, got any photo's of area above window, flashing on roof area, could be water is getting in & draining down, & soaking brickwork, water can do many strange things getting from A to B.

 

Thanks for video, makes things a lot clearer.

A damp proof course running around above the window, totally crazy! can't undertstand why it's there, other than to stop any leaking water soaking down.

Definitely need a gutter both sides, as water splashes off paving & back onto wall making it wet.

 

I think it is just a combination of penetrating damp, lack of air circulation and possibly condensation. The fact that it is wet in winter and dryer in summer reinforces this view. The rustic bricks you have will absorb a certain amount of moisture and with the walls being a solid 9 inch it will come right through from outside. it appears that your main front door from a security point of view is the porch door. So if the house is empty then you will shut all the porch windows and you probably close the inner door as well. You therefore create a dead unheated ,unventilated space that just absorbs moisture from outside and only gets better in summer.
So you really need to get rid of the moisture in the bricks. One way would to get a new doubled glazed door to replace the inner door so this would be your proper front door for insurance and security purposes. Remove everything from the porch and leave all the windows and the outer door open when somebody is in and it is not raining. If no one is in lock both doors but leave the porch windows well open. The temperature inside the porch would then be similar to outside. This should stop any condensation and the airflow would help to dry out the bricks. You could also use a dehumidifier but their is really no substitute for a fresh breeze.
As has been said the gutters should be properly in place and connected to a down pipe and if their really is no damp course one or two bricks up from the ground then it is quite easy to insert a chemical one.
One it has all died out inside you could use a wire-brush to remove all the paint you can and either leave it at that or paint it with some breathable paint.
Also repair any defective pointing (where that crack is).