Hi. I have a small live room, and I started getting small patches of dark green dust on my walls. The room doesn't feel damp but after a searched it looks like condensation due to bad ventilation. I work in large studios in london so am aware the cost of air con, I don't have that. I found these http://www.soundproofing-direct.com/pc/ ... -16p22.htm
Any thoughts. I will add the walls of the live room are external.
Antony.
Ventilation for small live room
Originally posted at johnlsayers.com, topic 14918.
Antony,
How big is the room. Dimensions please?
The vent you linked is straight and will probably not offer the STL that you need. It might work with the addition of a baffled box in the room interior. John Sayers has a ventilation design for a booth here that you could modify to work with this acoustic wall vent.
It also could be that you have no vapor barrier. How old is the house?
Cheers,
John
Hi John
Thanks for your reply. The room is aprox 3m x 3m a little bit over. The studio is built in a row of old garges aprox 1920. They have large eve roof. We did do a damp course when we built it. So you would suggest getting one of those vents. Is there a link for the baffled box.
Cheers
Antony
No, John said that it would NOT give you the degree of isolation that you need. Adding a silencer (a.k.a. "baffled box") will do the job, but if you do that then you don't really need one of those vents. Any old pair of vents will do (and will be much cheaper!), if you use a silencer. Search the forum for the term "silencer", and you will find numerous threads, with many examples of how to make them. How much airflow do you need for your room, and what speed? What fans will you be using? - Stuart -So you would suggest getting one of those vents.
you should have a professional HVAC person check it out. if you have a moisture issue you're going to need someone to assess the situation and workout what dehumidification/cooling/heating/ventilation is needed. simply putting in a air exchange (while critical) might not be the complete answer.
It is nothing but guessing as to what might be the issue from what is this "green dust". It is either mold or it is dark green dust ;) . "after a searched it looks like condensation due to bad ventilation. " If this refers to something on the Internet, do not trust it to apply to your situation directly, it may or may not, everything matters. There is some form of ventilation even if it is opening a door or window right? The most important aspects to ascertain what is happening in this room/house is to have pictures and or describe what the building is made of, material wise. The lack of a vapor retarder or even the inclusion of one does not immediately give indication as to what is happening inside. Especially if this is a concrete structure :) So I have to agree with Glenn that you need to get someone local with experience as this is a serious issue that can alter your health and can deteriorate a buildings materials over the long run.Hi. I have a small live room, and I started getting small patches of dark green dust on my walls. The room doesn't feel damp but after a searched it looks like condensation due to bad ventilation. I work in large studios in london so am aware the cost of air con, I don't have that. I found these http://www.soundproofing-direct.com/pc/ ... -16p22.htm Any thoughts. I will add the walls of the live room are external. Antony.
Hi
Here's a pic. Excuse the xmas lights.There are two places like this. The walls don't get any worse. But I find the green dust on the baffles.
Antony
I hate to say this but: Please read the forum RULES (stickies) that can be found at this link: viewforum.php?f=17 Then make certain that this is reviewed: viewtopic.php?f=2&t=3231 Please correct your initial post to conform with these rules and guidelines. Many here will not only NOT help while waiting in respect for owners and other better qualified persons to proceed, but will simply ignore these type of posts completely. You may want to immediately ask "what is it that I have missed". Most often it is as simple as including your geographical location in your profile. It might be that you have not included your budget! Trust me in that the more you know the better others can help you and that the answer to that question is in the forum rules linked page. Until then, good luck,Hi Here's a pic. Excuse the xmas lights.There are two places like this. The walls don't get any worse. But I find the green dust on the baffles. Antony
I just put in my location and occupation. Hope that was the problem. Thanks AntonyI hate to say this but: Please read the forum RULES (stickies) that can be found at this link: viewforum.php?f=17 Then make certain that this is reviewed: viewtopic.php?f=2&t=3231 Please correct your initial post to conform with these rules and guidelines. Many here will not only NOT help while waiting in respect for owners and other better qualified persons to proceed, but will simply ignore these type of posts completely. You may want to immediately ask "what is it that I have missed". Most often it is as simple as including your geographical location in your profile. It might be that you have not included your budget! Trust me in that the more you know the better others can help you and that the answer to that question is in the forum rules linked page. Until then, good luck,Hi Here's a pic. Excuse the xmas lights.There are two places like this. The walls don't get any worse. But I find the green dust on the baffles. Antony
Assuming this is the upper part of the wall/ceiling my first thought would be the roofing is either leaking or there is a gutter backing up OR a chimney or some other protrusion out of the roof, maybe a party wall that is allowing moisture to get access to this part of the wall. It just seems to high in the air to simply be a ventilation issue. But I have to ask when you say baffle are you talking about a part of the ventilation, the air in air out that is covered up with something?Hi Here's a pic. Excuse the xmas lights.There are two places like this. The walls don't get any worse. But I find the green dust on the baffles. Antony
I guess I'll have to get up on the roof again. We did replace the tiles on the roof. When I mentioned baffle, I was referring to a ventilation baffle box. AntonyAssuming this is the upper part of the wall/ceiling my first thought would be the roofing is either leaking or there is a gutter backing up OR a chimney or some other protrusion out of the roof, maybe a party wall that is allowing moisture to get access to this part of the wall. It just seems to high in the air to simply be a ventilation issue. But I have to ask when you say baffle are you talking about a part of the ventilation, the air in air out that is covered up with something?Hi Here's a pic. Excuse the xmas lights.There are two places like this. The walls don't get any worse. But I find the green dust on the baffles. Antony