I've definitely got rising moisture. The substrate aka felt is totally shot.
Mind the other side is worse, I've just slung a bit of weighted down DPM over the whole lot.
The paint on one I used last I'm sure used to say can be applied to damp surfaces. They've I think changed the can wording to on the lines it can be but better if the substrate is dry.
Not me. I used single pack, paint on Chromapol.
Tbh I've thrown probably several hundred Pounds at this over the years. The felt roof was knackered before I put this paint on. It's fibrous, the idea it reinforces itself.
I'd be interested to see how it performed on say a new, OSB sheeted roof.
The stuff I'm considering when I redo the roof is Desmopol. As used successfully by someone. I asked the other week how it was standing up. Wait one and I'll find the thread.
+1. It ate into my UPS pretty damn quick compared to the old BT router. It was cold outside so I guess it was heating the dish to keep the frost/ice off.
The first Starlink we installed at Christmas crapped out. My son called them on a Weds night. A guy called back from Starlink in the US pretty much as my lad hit send on the email. Customer service was amazing. Complete new kit arrived on the Friday morning. By way of apology they gave us a month's free subscription. Sent the old router and dish back on prepaid DHL. They said to hang onto the new long cable (circa £80 worth).
Then the other week it just "stopped" a quick phone calll and they fixed it there and then.
Price has come down massively since Christmas.
You can also rent, about a tenner a month rental plus the £75pcm.
The bricks on my gate pillars were showing some effervescence as well as spots of mortar etc. This after a clean with brick acid and spray application of this stuff. Still looks like this and nothing has come through:
Before & after: