cold and draughty. If anyone had the same problem in the past and has had it resloved I would be interested to know what you did your prevent the draughts etc. Incidentally I live in the North East Of Scotland and yes it is notoriously cold here. So maybe there is a solution. I have full gas central heating by the way and a log fire.

All the windows are doubled glazed.

I live in a stone and slate cottage in the Lakes and have the same problem. Not sure there is anything else we can do except make sure you have draughtproofing around all doors. It's the price we pay for living in beautiful houses and areas, I wouldn't change it for a warm draughtt free house (probably althought I'm not so sure today). I don't have double glazing because of the age and style of the property it wouldn't be allowed but the walls are about 3 feet thick so that helps. On the up side in the summer it is cool inside when everyone else is baking, if we have a summer that is.
all the best and hang on in there it'll soon be spring!

Drafty - As air in the house is warmed it rises and cold air falls to the floor. Similar to up and down stairs. Hot air will run pu and the cold air will fall down the stairs. This will call internal air currents.

Drafty - Wind entering the building through areas that are not granite - Winder frames, door frames and the areas along the roof.

Also the joints between the upper and lower parts of windows and the slots where the windows silde in the casements.

First - sealing all possible joints around the window frames and door frames. Do this one room at a time. Check for holes around water and heating pipes that pass through walls, floors and ceilings.

Around each door - there is a hinge side and a latch side of each door. Put a soft felt strip along the hinge side of the door. Put a thin felt strip along the facing around the door frame where the door seats. When the door is closed this will prevent air movement. Along the bottom of the door you can tack (and glue) a felt strip alonf the bottom of the door along both inside and outside face of the door.

For the roof - wall joint - this is likely the source of greatest heat loss. Seal the edges of every joint between the stone wall and the wood of the roof. around the roof beams, any opening will allow heat to run out, pulling cold air in along lower areas.

Seal all outside openings. You might also want to double glaze the windows by fitting a frame with glass over the regular window. Pack the edges with felt to make a tight seal and prevent air movement between the two "Window" panels.

Log fire - well, no wonder you have drafts - you have a perfect vernt to allow the air inside the house to go through the chimney to the outside. You are pulling air in from outside to feed the fire..

I live on Korea and face the same problem. the answer is seal every possible place where air can enter the building or excape from the upper areas.

Keep doors between rooms closed, Use punk sticks (Incense) to detect wind entering the house. the leak on the lower floors will blow the smoke inwards and where hot air is escaping, the smoke will be sucked toward the leak.

This is a simple but time consuming task. It is not so expensive except to purchase the sealer. Silicone is often used but there are other materials much more permanent - 3M "5200" materials is superior as it is more weatherproof.

Cap all chimneys - warm air is shooting up those chimneys in large volumes. That includes the active fireplaces - though one would agree that there is nothing like the warmth of a fire to make one cozy but with energy prices as they are.... it is an expensive indulgence. It may be the largest source of the drafts.

Do this one room at a time. Use the incense (Punk) sticks to detect air movement. when each room is sealed go to the next.