right today i been installing new nest boxs now i been in the sport for 5months, thought it was about time to improve before the yb races i need help on improve the ventilation in my loft ? i have a 4inch gap at the back and 2x vents at the front and sheds off the ground buy a foot , just i went into the loft with a candle like i got told by an other fancyer the candle just burnt away with my finger hurting due to the wax on them haha any idea on help to help improve it i would be greatful photo of the shed out side