Rescue dog is weeing on chair legs

[snowdrop6]

We’ve had him 5 weeks ,he’s now eating and he’s put on a kg.even got a bit of recall happening.
Every morning I come down to my chair leg soaked in wee.the chair is right next to the pet flap for him to get out in to the garden.its like he knows to head that way to wee ,gets to the pet flap and sees its dark/ cold / rainy..(just guessing here) and then changes his mind and weeks on my chair.ive put a long throw over the chair ,so he’s just weeing on the throw which I’m now washing every morning.
The wee smell is so strong ,I used to have a nice conservatory to sit in.now I can just smell very strong wee.
I’m using pet spray and keeping everywhere clean.
He’s booked in to have his bits off Incase it’s that ,my other dog is a girl.
Plus he’s not doing it in the day.in fact I’ve yet to catch him in the act ,I’ve never seen him wee in the house since the first night.
What can I do / or what am I doing wrong?

[Wolfiefan]

Look on the site dog training advice and support on FB.
Take him out on a lead. Every half an hour and also after eating, drinking, sleeping or playing. Basically you need to ensure he’s outside when he needs to go. And praise when he does.
Sorry if I missed it but has he been checked for UTI?

[snowdrop6]

No check for uti ..but at vets on Monday so I can get them to do it while they have him

[Bigsighall]

Make sure you see him have a wee before bed. For the next couple of week, set an alarm halfway through the night and get up and make him wee. Make sure he understands a wee command! Take the chair out because he might just be associating it with weeing now.

[Wolfiefan]

If you’ve only had him a month and you have behavioural issues and he’s not been eating etc (possibly anxiety) then why neuter just yet.

[Nesssie]

If you are going to throw out the armchairs anyway, I would suggest putting them in the garden so he pees on them there and then gradually take bits away until just a small bit of fabric is left, and then you should be able to remove it completely and he'll still wee there out of habit.