hi. great videos. thanks. just a question about the spacer and the seal. I am going to try and have a go at making my own double glazed timber windows. With the spacer, could Accoya timber be used, as it is extremely stable as you've pointed out, could it be used as a spacer. And as I have no access to hot melt butyl, could other sealants be used such as silicon. Also, just about the timber framing of a window using Accoya, does it matter what type of joint is used. Would a dowel joint be OK using another species of timber, or would it be best to use the Accoya timber even in a dowel for the joint connection. Thanks very much for this series of videos on timber windows. brilliant.
Hi Jude, Thanks for your comment. We don't make our own sealed units, but I would be cautious about using any timber as a spacer for a sealed unit, as all timber contains some moisture that would be trapped in the cavity. Jointing method is pretty critical to the window construction.
You can’t use timber for a spacer bar. The unit needs to be completely air tight, hence the hot melt. They use a plastic ‘warm edge’ spacer bar these days. If you want double glazed units it’s not something you can do at home, you’ll have to get them factory manufactured. You can however do a Swedish design, which incorporates two single glazed sashes, often fixed together with hooks. Or there are windows with opening in casements internally, air gap and then outward opening sashes externally. The air gap between is as good as, if not better u value as a double glazed unit. Search gantelius fonsterhantverk on instagram. I recommend wedged mortice and tenon joints for the casements/sashes.
hi. great videos. thanks. just a question about the spacer and the seal. I am going to try and have a go at making my own double glazed timber windows. With the spacer, could Accoya timber be used, as it is extremely stable as you've pointed out, could it be used as a spacer. And as I have no access to hot melt butyl, could other sealants be used such as silicon. Also, just about the timber framing of a window using Accoya, does it matter what type of joint is used. Would a dowel joint be OK using another species of timber, or would it be best to use the Accoya timber even in a dowel for the joint connection. Thanks very much for this series of videos on timber windows. brilliant.
Hi Jude, Thanks for your comment. We don't make our own sealed units, but I would be cautious about using any timber as a spacer for a sealed unit, as all timber contains some moisture that would be trapped in the cavity. Jointing method is pretty critical to the window construction.
You can’t use timber for a spacer bar. The unit needs to be completely air tight, hence the hot melt. They use a plastic ‘warm edge’ spacer bar these days. If you want double glazed units it’s not something you can do at home, you’ll have to get them factory manufactured.
You can however do a Swedish design,
which incorporates two single glazed sashes, often fixed together with hooks. Or there are windows with opening in casements internally, air gap and then outward opening sashes externally. The air gap between is as good as, if not better u value as a double glazed unit. Search gantelius fonsterhantverk on instagram.
I recommend wedged mortice and tenon joints for the casements/sashes.