I think we're trying to save on heating bills backwards

I've been thinking about this lately:

When the heating bill gets too high, most people immediately think about the heating system.

Turn the thermostat down.

Buy a more efficient heater.

Upgrade the furnace.

Replace the windows.

Add more insulation.

And some of those things absolutely make sense.

But I'm starting to wonder if we're looking at the problem from the wrong end.

**Before trying to produce more heat, shouldn't we first figure out why we're losing the heat we already paid for?**

An old house can have a surprising number of little leaks.

Around doors.

Around windows.

Around pipes.

Around attic hatches.

Through poorly sealed penetrations.

Places you don't really notice until you start thinking about the house as a system.

And individually, none of them seem important.

But put enough of them together and you're basically paying to heat the outdoors.

What interests me is that some of the fixes don't have to be expensive or permanent.

Weatherstripping.

Caulk.

Simple draft blocking.

Insulating an attic hatch.

Even temporary window insulation during the coldest part of the year.

That last one especially caught my attention.

Instead of replacing an old window, you can make a removable insulated covering and put it up when you actually need it.

It's not pretty.

It's not high-tech.

But I'm much more interested in something that costs $20–$50 and can actually improve comfort than something that costs thousands and takes years to pay for itself.

So I'm curious what people here have actually experienced.

**If you had $100 and one weekend to make an older house hold heat better, what would you tackle first?**

Not looking for generic "turn the thermostat down" advice.

I'm interested in the weird little things that actually made a difference.

Did sealing one particular area make a noticeable difference?

Did attic insulation help?

Did window coverings help?

Did you discover a draft you didn't even realize was there?

And if you've done several projects, which one gave you the biggest improvement for the least money?

I'd especially like to hear from people living in older houses or cabins.