Hygro

shazza71_2

Hi all,
does anyone know the average HYGRO reading for a 3 bed semi plz ?


thanx

albyota

I have mine at about 45%RH at the moment, some helpful details here...

http://home.howstuffworks.com/humidifier1.htm

shazza71_2

albyota wrote: »

I have mine at about 45%RH at the moment, some helpful details here...

http://home.howstuffworks.com/humidifier1.htm

thanx but its all gobbldygook to me lol,
my reason is last year we had 24 c temp with 20% humidity in the house, now the temp is 20 c and 48% humidity..which one is the best ? i havent a clue:(

thanx

albyota

Normal house humidity is between 30 and 50 percent. Lower and higher levels can cause various problems.

Low Humidity Problems
Houses that are too dry can cause people to have dry throats and noses, resulting in respiratory problems. Low humidity also causes dry skin. Wood can shrink, resulting in loose furniture joints. Additionally, you'll notice static electricity in clothing and carpeting giving you small shocks.

Humid Houses
Humidity rises over 50 percent in humid climates, especially during warm temperatures. Central air conditioning is the best solution, but room air conditioners and dehumidifiers also can help.

High Humidity Problems
High levels of humidity in a house can result in mold and mildew, problems with dust mites causing allergic reactions, infestation by other bugs, flaking paint and peeling wallpaper.

http://www.ehow.co.uk/facts_5081759_normal-house-humidity.html

hope this helps

shazza71_2

albyota thankyou very much,
our problem is we have had external wall insulation added to the house in Aug last year, now our room temp was 24 c, hygro 20% this time last year, few hours ago it was 20.c and hygro 48%.. upstairs we have major condensation/mould problems since the insulation so trying to work out the solutions and whether its made things worse or not as the LHA dont seem to want to know.

albyota

shazza, I think you've been given the best help and advice from jamesingram, davefowler, Martin, and wassup etc., on your other thread, however I would reiterate ventilation is now the key to getting the moisture level down, get the extract fan ducting sorted, and the skielings should be insulated to match EWI, I would also hit the LHA with ....'now you've insulated......"house unable to breathe".....wheres the mechanical heat recovery ventilation'.

AL

shazza71_2

ok thanx albyota,
the lha r blaming us for the probs, 1 has been told its the way they breathe FGS. the excuses are coming thick and fast so need some good tech advice at which i/we can throw at them. have found out edf have funded this so maybe i should go to them if lha wont do anything.. not blaming them but letting them know that what they have funded has damaged our houses..

rogerblack

shazza71 wrote: »

ok thanx albyota,
the lha r blaming us for the probs, 1 has been told its the way they breathe FGS. the excuses are coming thick and fast so need some good tech advice at which i/we can throw at them. have found out edf have funded this so maybe i should go to them if lha wont do anything.. not blaming them but letting them know that what they have funded has damaged our houses..

Get an IR thermometer.
http://www.dealextreme.com/p/1-2-lcd-non-contact-digital-infrared-thermometer-with-laser-sight-50-c-380-c-904435754

42% humidity, of itself is not bad.
In order to get condensation with 42% humidity at 25C, the temperature on a surface needs to get under 15C or so.
This would indicate clear defects in the insulation.
The thermometer will let you work out just how cold bits are getting.

shazza71_2

ok, left my weather machine in the bathroom overnight, temp was 17.4 c hygro 58%.

whasup

I presume those figures are air measurements. (17.4°C - 58%) What you really need to know is the surface temperature of the external walls.

58% is high - more than I would expect with a properly functioning extract fan. Do you have a fan? Is it working? Is it switched on? How long does it over-run? Do you have trickle vents on the windows?

shazza71_2

we have a fan, the window was not wide open we just didnt turn the handle and no trickle vents. all i can say is that was the weather machine readings.