Hope this is the correct place to put this topic.
We recently moved into a 1920's terraced house. It's a big old house with a lot of draughts... I've worked through solving most of them during the summer, we had cavity wall insulation done but the house is colder this winter than last. The ground floor is a raised wood floor with a cavity underneath. During the cavity wall insulation "fitting" the company noticed the rear air brick was blocked so they fitted a new airbrick. Since they fitted this brick - correctly - the draughts coming up through the floor quite noticable. The rooms themselves are quite warm with the central heating on, but the floor is cold. We fitted carpets and some decent underlay, not the top of the range but mid range underlay. Problem is we have a one year old who is crawling around the floor and I'm concerned she will get colds due to the temperature.
Is there anything that can be done other than temporarily block the airbrick again. I know this is a big no no but I'm getting a bit desparate as to what I can do. I really don't want to resort to that.
I've read a few sites but a lot of them say be careful what you do in case it causes dry rot which I really don't want.
Filling the gaps between floorboards seems simple enough - but I'm not sure if this will cause more problems. Can you put a barrier around the air brick to try and prevent cold air blowing through?
Really stuck and would appreciate some decent advice before I pay someone to come in and suggest something simple which I should have thought of.
All thoughts appreciated.