Which drill bit to use.

[Rob Morley]

Could always sharpen it.

[Don]

The greenhouse manufacturer provided 2" wood screws and rawl plugs which required a 7mm bit, so that is what I've used. I borrowed a SDS hammer drill with what I was told was an all purpose bit. This went through the metal flange into the 2' x 3' x 2" concrete flags with no bother at all. Although the galvanised screws have larger heads than the 7mm hole I think I'll get some washers under them to spread the load.

Thank you to all the good folk who have given me advice here on uk.d-i-y. I an well pleased with my greenhouse, now that it's up.

Don

[Rob Morley]

Then how do you get the plug through the smaller hole?

[Richard Porter]

You can say that again! In the gales back in 1987 (iirc) my mother's greenhouse took off, flew over a 6' high hedge and ended up in a field. I still have some bits of aluminium from it.

[Andy Dingley]

My parents live up in the cabbage-belt of West Lancs. I think their local record for a flying greenhouse is about 1/4 mile. If a polytunnel takes off, they land somewhere in the Irish sea.