Basement conversion

[Andygasman2010]

When a basement is converted to a bedroom is it possible to get it completely dry or is there always going to be a little bit of moisture in the air?

I've had mine done and it's been properly tanked with a sump/pump, and a vent at high level going sraight to outside.

If I don't leave the heating on low in that room clothes and sheets tend to get slightly damp.

What causes it? Is this just a drawback of a basement room or is there something that can be done?

Thanks!

 

[Blagard]

As you know from experience heating and ventilation are the key issues to provide a solution.

Basements do tend to be colder and hence feel damper. Cool air in your house will sink low and as the air cools further it's ability to hold moisture reduces making the relative humidity of the air high (it will feel damp).

You could probably do a basic check yourself by having thermometers in the basement and an upper room.

Better still get a "wet and dry thermometer" to measure the relative humidity

 

[Andygasman2010]

Thanks so far.

It's always cold in the basement even on a very hot day and damp too if I don't keep the heating on low. I think now that it's something that can only be managed rather than solved completely.

Thanks

Andy

 

[noseall]

As with any subterranean structure, damp conditions always prevail unless you spend £££.

You either live with it or spend a lot of cash fighting it, there are no quick fix cures.

 

[Andygasman2010]

As with any subterranean structure, damp conditions always prevail unless you spend £££.

You either live with it or spend a lot of cash fighting it, there are no quick fix cures.

Thanks nosall

In my case I was just worried that the builder hadn't done the job properly but the more info I get it seems like it's something that's normal and just needs managing propperly.

Out of curiousity, what is the solution if I did decide to spend £££?

 

[noseall]

Out of curiousity, what is the solution if I did decide to spend £££?

My advice would be to research subterranean tanking specialists.

 

[Andygasman2010]

It was done by a company that specialises in basement conversions so it's been tanked and had drainage channels installed along with a sump/pump.

They fitted a humidity controlled fan that comes on only when required, although it never actually comes on! I'm not sure if there's something up with it.

I'll be seeing the builder shortly to ask his advice.

 

[^woody^]

A vent is rarely enough for a basement as the room is holding in a lot of humidity, which a structure above round would breathe out.

Your humidistat controlled extract vent may help - so turn the sensor up so it comes on at lower humidity levels. But its not ideal, as it relies on moisture building up before the fan trips on

A positive pressure fan would keep things dryer, and run quieter - this would push air around and out, but may give a slight chill due to constant air movement.

Keeping the heater on low and using the fan may be the best option - balance both with a thermostat and humidistat to get your comfort level