A loft hatch that dumps heat is usually the catch
I stood on the landing in November and felt a cold line on my neck. The heating was on. The landing radiator was warm. The draught was coming from the loft hatch. I pushed the lid. It lifted. The catch had not pulled it down. There was a gap you could post a letter through, all the way round. Warm air was going up. Cold air was coming down. I thought I needed more loft insulation. I needed the lid to shut.
A loft hatch is a lid. The catch holds it against the frame. A seal, a strip of foam or rubber, only works if the lid is pulled onto it. A catch that does not latch, or a lid that only sits in a rebate by weight, leaves a slot. Heat dumps. People buy a roll of mineral wool and leave the hatch as a hole. I am writing about the catch and the seal, not a catalogue of quilts.
A radiator that stays cold at the top is usually air is the rad on that landing. Bleed it if the top is cold. A TRV that will not shut is usually the pin is why a bedroom stays hot. Neither of those closes a hatch. If the rads are doing their job and the landing still has a draught from above, stay with the lid.
When I check I stand on a firm step and I push the hatch. If it rocks, the catch is not doing it. I look at the strike on the frame. A bent catch that only hooks on one corner pulls that corner down and opens the other three. I want a catch that draws the whole lid, or two catches on a long hatch. I look at the seal. Flat, missing, or painted solid is a gap. I replace the strip. I do not pile insulation on a lid that will not sit. The pile makes it heavier and harder to seat, and then the catch will not reach.
I also look at the hinges if it is a hinged hatch. A dropped hinge leaves a taper. The catch then fights a lid that is already off square. I take the catch off, seat the lid, mark where the strike should be, and I fix it into timber, not into a crumb of plasterboard. Screws in a skin pull. I have had that. The catch in my hand, the lid on my head.
Skip a bolt that only holds one corner. Skip leaving the hatch resting on a bag of leftover wool instead of a catch. Skip painting the seal so it looks tidy. Paint is not foam. Skip a loft ladder that kicks the lid off the strike every time you fold it. If the ladder fouls the catch, the catch will never stay shut. Skip opening the hatch in a gale and then blaming the heating.
UK year is autumn into winter, the first week the heating is on, when you stand in the hall and feel it. I now push the hatch when I bleed the landing rad. If the lid lifts, I do the catch before I buy another roll of anything.
I shut it and I feel again. A still landing and a lid that needs a firm click is the job done. A lid that drops under its own weight was never caught.
I do not need a new loft because the hatch dumped heat. I need a catch that pulls the lid onto a seal, and a frame the screws can bite.
If I later add a buy link here, it will be a paid promo.