Any way of keeping hens in?

[LaBelleDameSansPatience]

We have a new 'open top' hen run (previous one had a roof but this one is much bigger). New POL pullets keep flying out and scratching up DH's new lawn. He wants rid of them . I have clipped one wing - is there anything else I can do? The older ones don't fly out, although they no doubt could. The new ones keep jumpimg up on top of the house or the feeder and then jumping out.

Increase height of fencing and clip both wings more

There are a few options here:
a) Increase the height of the run, although I've seen hens clear a 7' fence before (not many, but some!)
b) Cover the top of the run with chicken wire
c) Clip the wing. It sounds like you've already done, this, but just to check, does it look like this? files.backyardchickens.com/graphics/wingclipping.gif The idea is that you clip the primary feathers on one wing. The primary feathers stop where the axial feather is (a short feather in the same 'line') and are used for flying. If you only clip one, then it will unbalance her, but if you clip both then she will simply be able to flap harder and still become airborne. You don't want to clip the secondary feathers, because those are the ones that are used for warmth, not flying. Don't forget that they will need reclipping every so often - primarily after the moult.

The other question I have to ask is, what breed are the new ones? Some are much more 'flighty' (e.g. Anconas) whereas some are too heavy to get particularly airborne (e.g. Orpingtons) and some don't have a snowflake in hell's chance of getting airborne (e.g. Silkies).

The new ones are Lohmans - a brown hybrid. One behaves and one doesn't. DH does not want a top on this run. About to check your link.

Yep, that's what I did.

One of the original ones jumped out a few times, but has stopped now. The original ones are all breeds - marans, aurucanas, welsummers - but I wanted to up the egg production. I did deliberately avoid Sussex or Leghorns, which I thought might get airborne, but obviously, these hybrids are quite light too.

How about some fruit netting stretched accross the top of run? Dead cheap and easy to secure in place.

Good idea ... and could probaly take it off when they settle down.

I would use fruit netting, wing clipping never stopped ours getting out as they did as yours do which is an urban assault course, it did stop them flying back in tho so we netted and they stopped climbing as it was pointless tho they gave it a good try!!

Those egg laying hybrids are quite light :(

I think your best option will be to put wire over the top though. I'm baffled as to why your DH doesn't want that to happen though - seeing as he does want to keep his lawn, and it will help protect them from predators as well.