Baby's room is always freezing...

[twocultures]

Not sure if this is in the right category...
My DS is 11mo and for a while now he's been in his own room.
Up to now we've had heating on quite a lot in the house so the issue wasn't so bad but since It's been getting a bit warmer we've cut down on heating and I've noticed how freezing DSs room gets, if I ever check on him at night as I open his bedroom door I can almost feel a cold draft and his room is considerably colder than the rest of the house, I'm willing to go as far as to say it's probably by a good 3 to 5C colder as you get cold as soon as you walk in.
I'm not sure if it's to do with where his room is positioned or that it's a tiny room and it has a big window.
I always make a point of dressing him warm for bed but recently he's got a runny nose and I can't think of any other reason for him to have developed it other than his room being so cold!
Even if I keep his door wide open its still bloody freezing! We can't move him back into our room as his cot would never fit.
Can anyone recommend anything I can do to make the room warmer? (Wether its extensive and expensive or something I could do myself)

We bought a thermal blind for DS2s cold bedroom. It's wider than the window hole and tucks behind the radiator so it's a nice snug fit. Makes quite a difference. He needs a new window though eventually.

Oh, I thought there was something about houses built specifically in Aberdeen or Penzance. Not just the geography thing.

PJ, we have cold downstairs rooms and dust around the carpet edges! Never considered gaps before causing an issue, thought the dust marks were just housekeeping but I've never had it before in a hpuse/.Thanks for the tip, assume it's just a case of sealing or is it best to remove/replace skirtings?

draughts around the ground floor can be blocked by filling the gaps. The best way is to fill the space between the joists with mineral wool insulation, but this would be hard unless you had access from below or were taking up the floors for some other reason. It is particularly bad if you have bare floorboards and no carpet. If you are very lucky you may be able to take up at least one board by the wall where is has been lifted and screwed down by a plumber or electrician.

You can have a go at pulling back the carpets, cleaning out the gap and filling it with something flexible such as caulk or silicone, or I have seen people use wide sticky tape between the floorboards and the bottom of the skirting. If the skirting is removed it will be easier to fill the gap. Cleaning it will help your filler to stick. Removing the skirting will often break off some of the plaster.

If you are using mineral wool, be sure to use the brown stuff treated with Ecose (it is made by Knauf but also sold as own-brands) which does not shed irritant dust and fibres. You can stuff it in quite tightly to fill irregular gaps. The packaging will mention Ecose.

You must not block airbricks which ventilate the void to air out damp.

What is the room directly below used for? Is that room kept warm?

Our nursery was directly over the porch which was open to the outside and therefore got very cold so we put insulation under the floorboards to help keep the room warm.