If you already have insulation but it was put in some time ago it is worth checking the.
Loft insulation roof eaves.
Reinstate install loft insulation to back of eaves insulation care should be taken to ensure air tightness.
Lap and tape all membranes around edges to existing membranes or as shown on detail.
All pipes in the loft space must be insulated too.
Then employ a roofer or knowledgable carpenter or builder to fit a couple of vent tiles either side of your roof this will provide more ventilation to the space.
Continue the insulation right to the edge of the ceilings but do not allow it to block the eaves ventilation.
The recommended depth of blanket style insulation glass or mineral wool for a loft is 250 to 270 mm.
Traditional fibreglass cellulose and spray foam insulation.
I had loft insulation done and it is has caused terrible condensation in the loft which has led to damp in the bedrooms.
How to insulate eaves of roof the options there are several common types of insulation in use in the uk today.
Seal all service penetrations through insulation and roof.
The layer of insulation should continue over water tanks but do not insulate directly underneath warmth from the rooms below can help prevent freezing.
Minimum recommended insulation in loft space these days is 270mm so you re better off laying 100mm rock wool between your ceiling joists then 200mm across the 100mm so it s cross layered.
All breathable membranes to loft and eaves insulation to to bs en 1928.
Durability to en 1297 1296.