mjc55 Posted April 23 Share Posted April 23 Looking at costs for installing a green roof on our new build and I have been quite surprised at the costs being mentioned on the (many) suppliers websites. £100 per sq. m. seems to be average and given that we are planning on having around 250 sq. m. of roof or so (large overhang at rear - about 2.5 metres or so) then we are looking at around £25k or so to do this. Would be interested in hearing how others have gone on taking this approach, whether employing someone to install or self-install (our preference at this stage). I know that there are some on here that don't seem to think that a green roof is a great idea, and I am not averse to having that discussion, but the main thrust of this post is to try and get a feel for the "real" costs of a green roof. Thanks in advance. Link to comment Share on other sites More sharing options...
Thorfun Posted April 23 Share Posted April 23 £100/m2 seems quite cheap. Does that include insulation, waterproofing and the green covering or just for the greenery? Link to comment Share on other sites More sharing options...
mjc55 Posted April 23 Author Share Posted April 23 47 minutes ago, Thorfun said: £100/m2 seems quite cheap. Does that include insulation, waterproofing and the green covering or just for the greenery? That's what I am trying to understand! Have to say that I am finding that price quite high for what seems like a reasonably simple solution! Given that turf costs a lot, lot less (I know it's not exactly the same thing) I don't quite see why green roof solution costs upwards of ten times the price? Link to comment Share on other sites More sharing options...
SteamyTea Posted April 23 Share Posted April 23 2 minutes ago, mjc55 said: I don't quite see why green roof solution costs upwards of ten times the price Put a tray of light soil, 7 metres up from the ground and watch what happens. Link to comment Share on other sites More sharing options...
Thorfun Posted April 23 Share Posted April 23 45 minutes ago, mjc55 said: That's what I am trying to understand! Have to say that I am finding that price quite high for what seems like a reasonably simple solution! Given that turf costs a lot, lot less (I know it's not exactly the same thing) I don't quite see why green roof solution costs upwards of ten times the price? yep. it's a pretty simple solution albeit with lots of layers. I could've done it a lot cheaper myself but I wanted a guarantee for the flat roof covering (was also required for our warranty) so I got a professional to do it all. from insulation to waterproofing to green roof to edgings etc. including the hire for a telehandler was about £400/m2 to give you an idea. so, as I say, £100/m2 seems pretty cheap. 1 Link to comment Share on other sites More sharing options...
Conor Posted April 23 Share Posted April 23 Looked in to this. Sedum plugs are much cheaper than the mats. Just need to be a bit more patient and do more maintenance in the first year. I think green roofs are great when done right. Go for it. 1 Link to comment Share on other sites More sharing options...
mjc55 Posted April 23 Author Share Posted April 23 1 hour ago, Thorfun said: yep. it's a pretty simple solution albeit with lots of layers. I could've done it a lot cheaper myself but I wanted a guarantee for the flat roof covering (was also required for our warranty) so I got a professional to do it all. from insulation to waterproofing to green roof to edgings etc. including the hire for a telehandler was about £400/m2 to give you an idea. so, as I say, £100/m2 seems pretty cheap. So what was the roof makeup before the green roof got installed? Link to comment Share on other sites More sharing options...
Meabh Posted April 23 Share Posted April 23 The green roof part of our build goes on next week. Build up is Joists, Ply, vapour layer, insulation, membrane. We used Bauder. Next week they do electronic testing to check for any leaks before the sedum goes down. The green roof buildup (not the normal flat roof build up) seems to be coming out about £150/m2 - we are doing 30m2). Delivery of the material to site and getting it up on the roof is a costly part - Bauder green roof comes in rolls. Link to comment Share on other sites More sharing options...
Thorfun Posted April 23 Share Posted April 23 (edited) 39 minutes ago, mjc55 said: So what was the roof makeup before the green roof got installed? A timber frame Edited April 23 by Thorfun added link to blog Link to comment Share on other sites More sharing options...
markharro Posted April 23 Share Posted April 23 30 minutes ago, Meabh said: Next week they do electronic testing to check for any leaks before the sedum goes down. Thats interesting - how does that work? Link to comment Share on other sites More sharing options...
Meabh Posted April 23 Share Posted April 23 1 hour ago, markharro said: Thats interesting - how does that work? I'll let you know next week....it apparently can pick up a pinprick hole! So have been recommended to do it, before the Green Roof goes down. 1 Link to comment Share on other sites More sharing options...
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