Thu, 25 Jun 2026 02:37:27 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309037#Comment_309037 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309037#Comment_309037 Mon, 18 Aug 2025 10:36:09 +0100 andyburlow@gmail.com I have reduced the design to 3m x 1.5m, from the architects original, boat sized addition, more on budget initially.

Now we have our builders looking at the plans, I have forwarded the specs of the rooflight to them and they have asked about weight and fitting, as they have no prior experience fitting this size

These units are 250Kg and fitting outside the M25 doesnt appear to be an option (we are in Gloucestershire)

Does anyone have any advice re fitting these units? The builders are understandably declining the offer to man handle to unit from the delivery lorry to the top of the roof

Is a crane required or can this be manouvered by many hands and a beam lifter?

I have seen a few YT videos where smaller units can be lifted into final position - but not 3m chunk of glass!]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309039#Comment_309039 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309039#Comment_309039 Mon, 18 Aug 2025 11:05:30 +0100 djh https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309047#Comment_309047 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309047#Comment_309047 Mon, 18 Aug 2025 21:13:08 +0100 CWatters https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309049#Comment_309049 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309049#Comment_309049 Tue, 19 Aug 2025 07:11:09 +0100 revor
Presumably the glazing will arrive on a lorry with a hiab, can that get it close enough to offload onto the roof seeing that getting it onto the roof seems to be the main issue.

Or something like this.

https://www.jewson.co.uk/p/superlift-sl18-JTH06020

The spider crane and lifter will position it exactly in place though.

I would have thought the builders would come up with a solution.

Good luck]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309055#Comment_309055 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309055#Comment_309055 Tue, 19 Aug 2025 13:25:09 +0100 owlman IMO trying to manhandle a 250KG unit without a vacuum lift would be asking for trouble.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309057#Comment_309057 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309057#Comment_309057 Tue, 19 Aug 2025 14:57:55 +0100 revor Posted By: owlmanIMO trying to manhandle a 250KG unit without a vacuum lift would be asking for trouble.

Agreed.

My wife and I fitted the glazing in our Atrium. Just the 2 of us. I bought a 2nd hand vaccuum lifter. Our biggest panels weighed 100 kg size 2400 x 1400 mm the lifter made it so much easier. We did not have a crane but with the atrium being a steel beam structure I bolted metal work to it to form a gallows onto which to hang a chain block to it, and the lifter to that. The ground floor glazing was done by overhanging an I beam and using a beam trolley and chain block. In all we did about 14 lifts.

If you let the problem mull long enough you will come up with a method. Lie in bed thinking about it, and in the morning you will have a potential solution.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309058#Comment_309058 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309058#Comment_309058 Tue, 19 Aug 2025 15:40:26 +0100 GreenPaddy
I suspect the 3 units might be cheaper than the one large unit, as a lot more manuf can handle/anneal smaller panes.

Just a thought... not whilst lying in bed revor ;)]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309059#Comment_309059 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309059#Comment_309059 Tue, 19 Aug 2025 19:06:57 +0100 owlman https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309064#Comment_309064 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309064#Comment_309064 Wed, 20 Aug 2025 06:04:53 +0100 philedge https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309071#Comment_309071 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309071#Comment_309071 Thu, 21 Aug 2025 09:08:24 +0100 andyburlow@gmail.com Splitting the glass seems the easiest way to break up the weight
I am now considering a roof 'lantern' which is a frame holding 4 or more pieces of glass
Also moving to double glazing over triple would drop weight , albeit with a performance loss.
Im also reluctant to use the frame method due to thermal losses through the aluminium frame (thermally broken or not)]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309074#Comment_309074 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309074#Comment_309074 Thu, 21 Aug 2025 11:42:30 +0100 Peter_in_Hungary https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309087#Comment_309087 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309087#Comment_309087 Sun, 24 Aug 2025 07:31:00 +0100 revor Posted By: andyburlow@gmail.comSplitting the glass seems the easiest way to break up the weight

Am I missing something here, splitting what is a sealed unit will surely cause performance issues and interstitial condensation problems nevermind potential debris that might get included on reassembly.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309089#Comment_309089 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309089#Comment_309089 Sun, 24 Aug 2025 11:40:29 +0100 GreenPaddy https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309093#Comment_309093 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18334&Focus=309093#Comment_309093 Sun, 24 Aug 2025 16:56:56 +0100 revor