Bit niche!
We're hoping to build a double storey extension (9m x 5m kitchen on the ground floor and 4m x 5m on the first floor). We were originally going to use block and brick but we're now interested in using SIPs (instead of blocks) and then stock bricks for the outside. We realise that SIPs will cost more, but I think it'll be worth it.
We've sent out a request for quotes and already had a few rejections (not a big enough project for some companies and one has cited an access issue as we have a detatched house in SW London with a 1m side alley and they like to use a crane).
Does anyone have any experience with using SIPs, or any thoughts on them?