Upstairs heating and cooling

[Buzz word]

In my house during the winter the upstairs was freezing. I had the radiators on full and it didn't really make much of a differance. Downstairs was great and it held the heat unless I left the internal doors open and the cold upstairs would cool the whole house.

Not it's hot in the day the upstairs is boiling all day and night long. I have tried leaving the windows open but I can't really sleep like that as it backs onto a busy road and being essex there are a fair amount of noisy cars all through the night.

What can I do to fix this? I'm fairly good with practical problems but only being a home owner for 9 months house related problems are an area I have little knowledge in.

[Laurel Green]

I'd hazard a guess that there is insufficient insulation in the loft.

[Buzz word]

The insulation I have is pretty ropey looking. I think it's probably 150mm but most of it is covered by chipboard. I was thinking it may be worth doing the 270mm upgrade and getting rid of the chipboard. It would be nice if that fixes the temperature stuff.

[Laurel Green]

It should help but, short of installing Air Conditioning, it will never be that cool in the hotter months.
To help in keeping the house cool; keep curtains/blinds closed during direct sunlight. Try to keep a cross draught by opening the windows (slightly on the traffic side) in the evenings.