Condensation on most Windows - Picture Inside

magicoi said:
Sure will
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Absorbs up to 60ml. Good luck with that! That is for putting in a wardrobe or something.

When you microwave it to dry it out, you are just putting that 60ml of water back into your house also.



aaronhowe said:
All the PIV does is pump dry air from the loft into the house. This creates a positive air pressure in the house which then wants to escape out of any seals, doorways etc. This constant air flow of new air being pumped in and old air escaping reduces or stops the buildup of humidity in the house being generated by people breathing, cooking, drying clothes and taking showers etc.
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Must cool the house considerably in winter tho no? Does it have a filter, lofts can be horrid places!
 
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Yeah they do have pollen filters on them which need changing every 5 years. One of the selling points for the units is that they have been proven to reduce symptoms for allergy (hay fever) sufferers because all the air being pumped in is filtered.

I'll be honest it does reduce the temp slightly directly underneath the unit but not the rest of the house. Also dry air requires less energy to heat it than humid air so that kind of balances things out.
There is a heater add on for the one I bought which gently warms the air being pumped into the house if the temperature drops below a certain threshold but I didn't bother with it and haven't any issues with the house getting cold.

God I'm starting to sound like salesman for these things :p
 
I'll be honest it does reduce the temp slightly directly underneath the unit but not the rest of the house.
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Then the central heating is working harder to compensate in the rest of the house.


Also dry air requires less energy to heat it than humid air so that kind of balances things out.
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Except when it is humid outside.
 
Looks like my bedroom window too. I have to mop them each morning. First gen double glazing. I tried aldi dehumidifiers on each window sill, no change. Left the window slightly open, no change. The windows are probably knackered. I am running out of excuses before my wife gets me to change them. Hmm fish tank evaporation.
 
When you have a cold bridge, you will have condensation.

It's like trying to take a cold can of beer out of the fridge into room temperature and try to avoid condensation on the surface.

Not going to happen.

If you leave your window wide open however, turn off the heating in that room and make it as cold as outside......problem solved.

Or somehow remove all the humidity inside the room/house.
 
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AMMUT said:
I put one of these in the roof space of our new house instead of trickle vents in the windows.

http://www.beamcentralsystems.com/ventilation-systems/positive-input-piv

My parents had similar problems with condensation and they put one of these in the roof space in the hall and it cured it. The house is always fresh and it's great for anyone with allergies (hay fever etc).

Cost about £250 at the time but worth it IMO.
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Looked at these myself. We had all new DG installed last year and you will still get condensation. Not as bad as old DG though.

We are looking at the above method though as it is supposed to be very good indeed.
 
condensation can be a nightmare to try and sort out. We had it on the walls(bad mold) and windows.

We had to take a number of steps to remove it.

Make sure all extractors are well sealed and that the pipes lead outside (bathrooms/kitchen)

We had vents installed in the windows this removed most of the water from the windows. We had massive puddles in the morning.

Dirmasters are good but this all depends on type of building. They are better suited to a house. We live in an odd shaped bungalow and had to have two installed. Now you need to have a well ventilated roof-space for these so we installed tile vents on the roof.
They will make your house a lot cooler also but I believe you can get ones with heaters that will take the chill out of the air for the winter months.
 
I don't there's anything wrong with your window. If there's 2 of you sleeping in there with no ventilation and a big temperature differential you are going to get condensation like that. It's a big window.

New windows will improve it to a degree, but won't eradicate it.

You need some ventilation, either trickle vents or leave the window open a bit. Both of those will let some cold in, but there's not really any other way.

If you make houses air tight you get condensation. If you introduce ventilation you'll get heat loss. There will always be a trade-off between the two.
 
One thing I may add, I went into our loft and the insulation was all sodden. We have a 1965ish build with roof felt that is none breathable. The upstairs walls had water marks where the condensation/water had been running down from the loft. What I did find was that whoever had put the loft insulation in had rammed it into all the corners so there was no ventilation through the loft space. I emptied the loft of all the soaking insulation that was a horrible job, fitted eave vents and ensured the new insulation left gaps around the outside edges. This has definitely helped reduced the level of condensation upstairs and is worth a check. I think it is a combination of things but I do hate mopping the windows each morning upstairs.
 
blueboy2001 said:
I don't there's anything wrong with your window. If there's 2 of you sleeping in there with no ventilation and a big temperature differential you are going to get condensation like that. It's a big window.

New windows will improve it to a degree, but won't eradicate it.

You need some ventilation, either trickle vents or leave the window open a bit. Both of those will let some cold in, but there's not really any other way.

If you make houses air tight you get condensation. If you introduce ventilation you'll get heat loss. There will always be a trade-off between the two.
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All true, but If you have a house that is at a constant 20c, then the Low-E glass should really help, compared to the non coated old glass as the surface temperature of the glass should warm up due to the coating.

I used to get loads of condensation, to the point where it was pooling up on the window sill (cill?) every day. Even with the windows open all year around! Then fitted new windows, with low-E glass and now all there is is a 10mm strip of condensation on a cold morning . My house is a lot colder as well, often dropping to 12-14c.
 
I've bought a 400w flood light from wickes and am going in the loft to sift through all the loose (not rolls) insulation.

It needs more insulation anyway as there's only 10cm up there.
 
Threepwood said:
Absorbs up to 60ml. Good luck with that! That is for putting in a wardrobe or something.

When you microwave it to dry it out, you are just putting that 60ml of water back into your house also.
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Yeah, uits been rpetty ineffective. We only picked it up to see if it made any sort of difference! Answer - not!
 
Solus said:
I've bought a 400w flood light from wickes and am going in the loft to sift through all the loose (not rolls) insulation.

It needs more insulation anyway as there's only 10cm up there.
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Just FYI BnQ doing 30% off insulation atm, well the mineral wool Knauf stuff, decent deal.
 
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