Flibbertigibbet Posted September 24, 2019 Report Share Posted September 24, 2019 A couple of weeks ago I stocked up with half a dozen sacks of Excel, stuck them on the roof, as I had done in the past, and was surprised to find when I took one down that there was a patch where the top coat of paint had been stripped off. (Wrinkled and softened) Plenty of people seem to store coal on the roof, presumably without problems. It's Rylard enamel paint. What causes this, and is there any way of stopping it? Link to comment Share on other sites More sharing options...
rusty69 Posted September 24, 2019 Report Share Posted September 24, 2019 Just now, Flibbertigibbet said: A couple of weeks ago I stocked up with half a dozen sacks of Excel, stuck them on the roof, as I had done in the past, and was surprised to find when I took one down that there was a patch where the top coat of paint had been stripped off. (Wrinkled and softened) Plenty of people seem to store coal on the roof, presumably without problems. It's Rylard enamel paint. What causes this, and is there any way of stopping it? Mine did exactly the same last year. Will be putting them on something this year. I am sure it never used to happen, so assume the bags have changed. Link to comment Share on other sites More sharing options...
Dave123 Posted September 24, 2019 Report Share Posted September 24, 2019 I noticed the bag of excel had cleaned the paint...when I cleaned away the 'coal juice' that had washed out the bag it left a patch of paint brighter than the rest! Link to comment Share on other sites More sharing options...
dave moore Posted September 24, 2019 Report Share Posted September 24, 2019 Any items left for some time on a cabin top tend to trap damp, persistent damp will cause paint to fail, regardless of make. I’ve seen this countless times over the years. I’ve never been a fan of cluttered cabin tops for this reason. Coils of rope, beloved of many boaters these days, are another culprit. When leaving Resolute the cabin top was always clear of ropes etc. Only the long shaft and gangplank, on moveable timber cradles, were left. No blistering. Hope this helps. Dave 1 Link to comment Share on other sites More sharing options...
dmr Posted September 24, 2019 Report Share Posted September 24, 2019 Except for epoxy no paint is 100% waterproof so trapped/standing water will eventually do damage. Never had a big problem with the coiled ropes but bags of coal, even on rubber mats, will give trouble. I have a raddle roof and expect to make some repairs every spring. I put extra coats of paint on in the coal store area, and a good layer of polish, and this helps a lot, but there are still usually one or two little paint bubbles. ..............Dave 1 Link to comment Share on other sites More sharing options...
Richard10002 Posted September 24, 2019 Report Share Posted September 24, 2019 I used to use coal bags on the roof to level the boat up. Always has a tendency to list to port due to the layout. After a couple of years, the already not good roof paint was destroyed. Removed coal and store it ashore now. Painted roof. Bought 3 x 56lb weights to keep boat level. Link to comment Share on other sites More sharing options...
BruceinSanity Posted September 24, 2019 Report Share Posted September 24, 2019 I don’t know how true it was, but when we first started living aboard in ‘04, we were told never to store coal bags directly on the roof as acids can leach out of the coal and damage the paint. We took to wrapping the bags in a tarp, but it doesn’t avoid the trapped moisture problem. The other solution is to make a dais for them out of inverted bread crates. Link to comment Share on other sites More sharing options...
Dr Bob Posted September 24, 2019 Report Share Posted September 24, 2019 2 hours ago, dmr said: Except for epoxy no paint is 100% waterproof so ......... ..............Dave .....and epoxy isnt either. Ok, its the best you can get as a 'normal' coating for water permeation but it still lets a small amount of water/oxygen through. Link to comment Share on other sites More sharing options...
rusty69 Posted September 24, 2019 Report Share Posted September 24, 2019 7 minutes ago, Dr Bob said: .....and epoxy isnt either. Ok, its the best you can get as a 'normal' coating for water permeation but it still lets a small amount of water/oxygen through. What do ducks use? They seem pretty waterproof. Link to comment Share on other sites More sharing options...
stegra Posted September 24, 2019 Report Share Posted September 24, 2019 9 minutes ago, rusty69 said: What do ducks use? They seem pretty waterproof. Anti-fowl. 4 Link to comment Share on other sites More sharing options...
dmr Posted September 24, 2019 Report Share Posted September 24, 2019 20 minutes ago, Dr Bob said: .....and epoxy isnt either. Ok, its the best you can get as a 'normal' coating for water permeation but it still lets a small amount of water/oxygen through. Your splitting hairs a bit there, its pretty damn good in my limited experience. Nothing is 100% of anything anymore, I blame that Einstein bloke, If Newton had made epoxy it would be 100%, you knew where you stood with Newton. ...............Dave Link to comment Share on other sites More sharing options...
rusty69 Posted September 24, 2019 Report Share Posted September 24, 2019 ... Anywhere but under an apple tree. 1 2 Link to comment Share on other sites More sharing options...
Dr Bob Posted September 24, 2019 Report Share Posted September 24, 2019 3 hours ago, dmr said: Nothing is 100% of anything anymore, ...............Dave 100% is. 1 Link to comment Share on other sites More sharing options...
Dr Bob Posted September 24, 2019 Report Share Posted September 24, 2019 3 hours ago, rusty69 said: What do ducks use? They seem pretty waterproof. Mine uses diisononyl phthalate. 1 Link to comment Share on other sites More sharing options...
dmr Posted September 24, 2019 Report Share Posted September 24, 2019 5 minutes ago, Dr Bob said: 100% is. Nah, that's not true either, footballers and other sportsmen routinely give 110% so where does that leave 100%?, somewhere about 90 I would say. And we all know that guitar amps go up to 11. ..............Dave Link to comment Share on other sites More sharing options...
Sea Dog Posted September 24, 2019 Report Share Posted September 24, 2019 12 minutes ago, Dr Bob said: Mine uses diisononyl phthalate. I reckon that's a quack remedy. Link to comment Share on other sites More sharing options...
The Dreamer Posted September 24, 2019 Report Share Posted September 24, 2019 4 hours ago, rusty69 said: What do ducks use? They seem pretty waterproof. Not sure I’ve ever seen a duck with a coal bag strapped to their back though! 1 Link to comment Share on other sites More sharing options...
BruceinSanity Posted September 24, 2019 Report Share Posted September 24, 2019 6 minutes ago, The Dreamer said: Not sure I’ve ever seen a duck with a coal bag strapped to their back though! Coal tits, on the other hand... 1 Link to comment Share on other sites More sharing options...
Dr Bob Posted September 24, 2019 Report Share Posted September 24, 2019 5 minutes ago, BruceinSanity said: Coal tits, on the other hand... Someone called? Link to comment Share on other sites More sharing options...
rusty69 Posted September 24, 2019 Report Share Posted September 24, 2019 18 minutes ago, Dr Bob said: Someone called? Great tit 1 hour ago, Dr Bob said: 100% is. If 100% is nothing, how many % is 100? 1 Link to comment Share on other sites More sharing options...
ditchcrawler Posted September 24, 2019 Report Share Posted September 24, 2019 I was told some years ago when micro blistering hit the news, "What do you expect if you leave snow on the roof" 1 Link to comment Share on other sites More sharing options...
Dr Bob Posted September 24, 2019 Report Share Posted September 24, 2019 3 minutes ago, rusty69 said: Great tit No, this is a great tit 1 1 Link to comment Share on other sites More sharing options...
Dr Bob Posted September 24, 2019 Report Share Posted September 24, 2019 I do like photo'ing tits. Here's a pair I shot a few years back. 1 1 Link to comment Share on other sites More sharing options...
rusty69 Posted September 24, 2019 Report Share Posted September 24, 2019 1 minute ago, Dr Bob said: I do like photo'ing tits. Here's a pair I shot a few years back. Why you shoot em, they are so cute? My titpedia doesn't inform me wot kind though. Is it a trick question? Long-tailed tits, or wagtits? 1 Link to comment Share on other sites More sharing options...
Dr Bob Posted September 24, 2019 Report Share Posted September 24, 2019 3 minutes ago, rusty69 said: Why you shoot em, they are so cute? My titpedia doesn't inform me wot kind though. Is it a trick question? Long-tailed tits, or wagtits? Long tailed you t** Link to comment Share on other sites More sharing options...
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