I'm guessing that we have been quoted for worst-case scenario all round. As in, if they have to rawlplug and screw ALL the mesh, but I guess they will be trying to nail it etc. However, I bet we don't get a reduction if they do it quicker, they will just knock off a little earlier.

I can't measure at the moment, but thinking of it logically, the 2 rooms at the front (as in, the ones with the bays) are just over 3 metres wide each, so that must make the front and rear 8 metres long, roughly.

The side that can be seen from the front view, with the 3 windows has the bathroom (4 metres long), Rosie's room, (2.5 metres) long and our bedroom (3 metres long). So, that must make the sides around 9.5-10 metres long.

The garage has a door on the front and rear at the moment. So those walls can hardy count as there is hardy any wall and the side is obviously part of the 10 metre total length of the side of the bungalow.

So, take 2 x 10m and 2 x 8m, which makes 36m, multiplied by the height (2.5m for example), makes 90m. Then the gable ends. Even over-estimating, I am struggling to find much over 100sq metres.

I think some other quotes are needed. It's just tough, because there really aren't that many people that I feel inclined to want them to quote!