MtB Posted September 2, 2008 Report Share Posted September 2, 2008 Hi everyone, Our boat has a number of conventional brass mushroom vents in the roof. One of them is in the cabin directly above our bed, and has the enfuriating habit of dripping a drip of condensation water directly into my ear at about once an hour throughout the night when the outside temperature falls below about seven degrees C. Our current solution is a wodge of tissue paper tucked behind the brass grill on the ceiling on the inside of the boat, but this is hardly the real answer as it further reduces ventiation in the cabin. I've no doubt the other mushrooms in the boat roof do it too and I'm sure we can't be the first to have this problem! Anyone have any suggestions as to how to reduce/prevent condensation forming on the underside of mushooms and dripping into the boat? Cheers Mike Link to comment Share on other sites More sharing options...
blackrose Posted September 2, 2008 Report Share Posted September 2, 2008 (edited) Hi everyone, Our boat has a number of conventional brass mushroom vents in the roof. One of them is in the cabin directly above our bed, and has the enfuriating habit of dripping a drip of condensation water directly into my ear at about once an hour throughout the night when the outside temperature falls below about seven degrees C. Our current solution is a wodge of tissue paper tucked behind the brass grill on the ceiling on the inside of the boat, but this is hardly the real answer as it further reduces ventiation in the cabin. I've no doubt the other mushrooms in the boat roof do it too and I'm sure we can't be the first to have this problem! Anyone have any suggestions as to how to reduce/prevent condensation forming on the underside of mushooms and dripping into the boat? Cheers Mike The problem as you've discovered is condensation forming in the vent. It should in theory run down the inside of the vent and drip outside onto the roof, but sometimes the condensation at the very top doesn't run down and can drip in. I had this problem when the condensation froze on a cold night and in the morning when the sun hit the vent it defrosted and dripped onto the bed. My solution was to take off the top of the mushroom vent and put a tiny bit of sprayfoam from a can into the very top of the dome. I was told off by other forum membes for doing it and I've no doubt I will be told off for suggesting it again. However, unless your mushrooms are misaligned (that is if the outer edge is over the hole), then the problem is only that condensation at the very top of the dome is dripping in. Therefore that's the problem area that needs to be addressed and a 2" diameter blob of foam less than half an inch thick in the very top of the dome will not restrict ventilation. Other vents are flat designs so it is not the height of the dome which provides ventilation - the mushroom dome top is simply a baffle and as long as it does not alter the air gap underneath then I don't see the problem. Sprayfoam does get a bit messy and is difficult to control so perhaps you could try it with a bit of cork tile cut into a small circle instead, using some PU adhesive or silicone to stick it on. Edited September 2, 2008 by blackrose Link to comment Share on other sites More sharing options...
RLWP Posted September 2, 2008 Report Share Posted September 2, 2008 ...of mushooms and dripping.... Cheers Mike Mmmmm. Can I have that on toast? Richard How about laying a wick from the centre of the upstand to the edge? Link to comment Share on other sites More sharing options...
bag 'o' bones Posted September 2, 2008 Report Share Posted September 2, 2008 (edited) Why is a thin layer of spray foam such a bad idea? As long as it does not restrict ventilation I think its an excellent solution. If your gob of foam gets a bit thick you could always carve to shape once cured. Edited September 2, 2008 by bag 'o' bones Link to comment Share on other sites More sharing options...
Neil Corbett Posted September 2, 2008 Report Share Posted September 2, 2008 Anyone have any suggestions as to how to reduce/prevent condensation forming on the underside of mushooms and dripping into the boat? Thanks to the previous owner, our boat has brass ashtrays suspended on thin brass rods a couple of inches below the vent. It looks cute and catches anything that falls and it evaporates from there so there is no maintenance /emptying required. Sadly I don't have any photos to demonstrate. Neil nb Herbie Link to comment Share on other sites More sharing options...
RobinJ Posted September 3, 2008 Report Share Posted September 3, 2008 Our boat has a number of conventional brass mushroom vents in the roof. One of them is in the cabin directly above our bed, and has the enfuriating habit of dripping a drip of condensation water directly into my ear at about once an hour throughout the night when the outside temperature falls below about seven degrees C. I've never had this problem, water is always forced back up by the escaping hot air! We do have a similar problem with the hatches though, condensation forming on the metal edge and dripping down (can't insulate it as it would stop it opening and closing). It occurs to me that the problem is the bar through which the vent is screwed, if these are made correctly, the water should run across the top and down the outside of the vent, so the only place it might drip from is the underside? How about some sticky padded plastic like headlining stuff? Link to comment Share on other sites More sharing options...
Machpoint005 Posted September 3, 2008 Report Share Posted September 3, 2008 Heat the dripping gently in a frying pan, then add the finely chopped mushrooms. Delicious on toast! Link to comment Share on other sites More sharing options...
RobinJ Posted September 3, 2008 Report Share Posted September 3, 2008 Heat the dripping gently in a frying pan, then add the finely chopped mushrooms. Delicious on toast! Still need the tissue paper to clean the dripping up! Link to comment Share on other sites More sharing options...
RLWP Posted September 3, 2008 Report Share Posted September 3, 2008 Heat the dripping gently in a frying pan, then add the finely chopped mushrooms. Delicious on toast! Right, I'm off to the VP to see if Stavros can make this. Richard Link to comment Share on other sites More sharing options...
carlt Posted September 3, 2008 Report Share Posted September 3, 2008 In the absence of snails I'll have my mushrooms dripping in garlic butter, ta. Or preserved in honey..... Link to comment Share on other sites More sharing options...
simonk Posted September 3, 2008 Report Share Posted September 3, 2008 Hi everyone, Our boat has a number of conventional brass mushroom vents in the roof. One of them is in the cabin directly above our bed, and has the enfuriating habit of dripping a drip of condensation water directly into my ear at about once an hour throughout the night when the outside temperature falls below about seven degrees C. Our current solution is a wodge of tissue paper tucked behind the brass grill on the ceiling on the inside of the boat, but this is hardly the real answer as it further reduces ventiation in the cabin. I've no doubt the other mushrooms in the boat roof do it too and I'm sure we can't be the first to have this problem! Anyone have any suggestions as to how to reduce/prevent condensation forming on the underside of mushooms and dripping into the boat? Cheers Mike Aha, I was wondering why the brass grille below the vent over our bed had a load of kitchen towel sandwiched in it... Now I know why I should leave it where it is (for the moment, until someone has suggested the best answer on here).... Link to comment Share on other sites More sharing options...
Smelly Posted September 3, 2008 Report Share Posted September 3, 2008 Or preserved in honey..... A person of rather interesting taste! Ill go with that Link to comment Share on other sites More sharing options...
bag 'o' bones Posted September 3, 2008 Report Share Posted September 3, 2008 We do have a similar problem with the hatches though, condensation forming on the metal edge and dripping down (can't insulate it as it would stop it opening and closing). Heres a suggestion, why not try black electrical insulation tape? Depending on how wide the edgings are you can buy insulation tape in wider widths from a agricultural supplies - Farmers use the wider stuff to repair plastic silage bags. Worth a try as its very cheap. Link to comment Share on other sites More sharing options...
Malarky Posted September 4, 2008 Report Share Posted September 4, 2008 Thin wire mesh, grill?Fluffy padding if needed. Link to comment Share on other sites More sharing options...
Machpoint005 Posted September 4, 2008 Report Share Posted September 4, 2008 Heres a suggestion, why not try black electrical insulation tape? ...or the stuff that you take off the edge of a slice of black pudding. Bet Carl wouldn't eat that with honey, though. Link to comment Share on other sites More sharing options...
carlt Posted September 4, 2008 Report Share Posted September 4, 2008 A person of rather interesting taste! Ill go with that Much tastier than mushroom tea... Link to comment Share on other sites More sharing options...
Nine of Hearts Posted September 4, 2008 Report Share Posted September 4, 2008 Much tastier than mushroom tea... One doesn't drink mushroom tea for the taste. Link to comment Share on other sites More sharing options...
carlt Posted September 4, 2008 Report Share Posted September 4, 2008 One doesn't drink mushroom tea for the taste. I'd rather get drunk on a bottle of Petrus than a can of Superbrew, though. Link to comment Share on other sites More sharing options...
Grace and Favour Posted September 4, 2008 Report Share Posted September 4, 2008 One doesn't drink mushroom tea for the taste. Never a truer word uttered . . . . . or s's's'stuttered Link to comment Share on other sites More sharing options...
pearley Posted September 4, 2008 Report Share Posted September 4, 2008 We bought an offcut of the padded material sold as table protector and glued it to the underneath of all the mushrooms and wrapped it round the central support. To make doubly sure we than painted it with International anti-condensation paint. Seems to have worked. Link to comment Share on other sites More sharing options...
stuart Posted September 4, 2008 Report Share Posted September 4, 2008 How about moving your pillows to the other end of the bed and sleeping around the other way. The water will drip on your toes then Link to comment Share on other sites More sharing options...
tidal Posted September 8, 2008 Report Share Posted September 8, 2008 (edited) This used to be a commom problem on older wooden yachts and like a previous poster some people used anti-condensation paint. However, thanks to the training I had in a Yorkshire sailing club where spending excess brass was frowned upon, I have found that a small artists brush laden with that rubberised gunk they used to spray on the bottom of cars has the same effect and at a signifcant cost saving...... edited to avoid offence to yorkshiremen Edited September 8, 2008 by tidal Link to comment Share on other sites More sharing options...
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