Green Building Forum - sealing expansion gaps in oak frames Tue, 16 Jun 2026 04:48:14 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 sealing expansion gaps in oak frames https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110562#Comment_110562 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110562#Comment_110562 Wed, 01 Jun 2011 17:03:03 +0100 bens sealing expansion gaps in oak frames https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110564#Comment_110564 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110564#Comment_110564 Wed, 01 Jun 2011 17:05:50 +0100 Joiner sealing expansion gaps in oak frames https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110565#Comment_110565 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110565#Comment_110565 Wed, 01 Jun 2011 17:10:02 +0100 bens sealing expansion gaps in oak frames https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110568#Comment_110568 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110568#Comment_110568 Wed, 01 Jun 2011 17:42:04 +0100 CWatters sealing expansion gaps in oak frames https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110574#Comment_110574 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110574#Comment_110574 Wed, 01 Jun 2011 18:24:34 +0100 Joiner :bigsmile:]]> sealing expansion gaps in oak frames https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110575#Comment_110575 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110575#Comment_110575 Wed, 01 Jun 2011 18:32:20 +0100 Joiner sealing expansion gaps in oak frames https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110581#Comment_110581 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110581#Comment_110581 Wed, 01 Jun 2011 21:40:17 +0100 Timber
Cracks, fissures, joints and gaps will all open up, unless the frame is of a VERY high standard. Even then fissures and cracks will still form.

8 - 10 years drying time sounds about right for a large section green oak structure.

With green oak buildings, maintaining air and moisture tightness can only be achieved with great design. Mastic or other sealants will work, but as it keeps moving, these will need to be re-done.

I can provide some more info tomorrow (a bit tired to give a real in-depth response).

If you provide some pictures of the sorts of gaps you are dealing with will help to determine what the best course of action will be.

Timber]]> sealing expansion gaps in oak frames https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110582#Comment_110582 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110582#Comment_110582 Wed, 01 Jun 2011 22:24:40 +0100 SteamyTea http://www.silex.co.uk/silicone_tubing_information.html]]> sealing expansion gaps in oak frames https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110585#Comment_110585 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110585#Comment_110585 Wed, 01 Jun 2011 23:01:09 +0100 Peter_S I would suggest trying polyrod seals or compriband tapes which can be compressed into the gaps and will expand as they open (+/- 15mm is not impossible to deal with). The fissures are harder as you can only really react to them after they occur but relying on a single lump of green oak between inside and out is always a risky move.]]> sealing expansion gaps in oak frames https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110590#Comment_110590 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110590#Comment_110590 Thu, 02 Jun 2011 07:13:00 +0100 bens
Peter_S I like the idea of polyrod seals but when I google it I dont get anything useful. Could you point me in the right direction on where to source them?

Many thanks all]]> sealing expansion gaps in oak frames https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110593#Comment_110593 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110593#Comment_110593 Thu, 02 Jun 2011 07:25:14 +0100 bens
Thanks all for your help, I will know better next time!

Ben]]> sealing expansion gaps in oak frames https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110597#Comment_110597 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110597#Comment_110597 Thu, 02 Jun 2011 09:04:28 +0100 Joiner sealing expansion gaps in oak frames https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110599#Comment_110599 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110599#Comment_110599 Thu, 02 Jun 2011 09:35:32 +0100 owlman I like the idea of polyrod seals but when I google it I dont get anything useful. Could you point me in the right direction on where to source them?

Compressible, expandable foam in metre lengths or on a roll are widely available. They are really handy for an initial "fill" for instance when fitting hardwood skirtings onto an old irregular surface, I use them a lot. They are available in lots of different forms and thicknesses For one closed cell constructional version try " FOSROC expandafoam" often used in large building projects. Insert them and then top off with a flexible sealant.
Mike,]]> sealing expansion gaps in oak frames https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110612#Comment_110612 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110612#Comment_110612 Thu, 02 Jun 2011 12:31:29 +0100 waddonvale sealing expansion gaps in oak frames https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110626#Comment_110626 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110626#Comment_110626 Thu, 02 Jun 2011 14:57:39 +0100 Peter_S
polyrod supplier uk
http://www.celltex.co.uk/content/view/31/84/]]> sealing expansion gaps in oak frames https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110675#Comment_110675 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110675#Comment_110675 Fri, 03 Jun 2011 13:18:09 +0100 bens sealing expansion gaps in oak frames https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110970#Comment_110970 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=110970#Comment_110970 Wed, 08 Jun 2011 23:46:52 +0100 wookey http://iso-chemie.co.uk/ Dafa don't seem to have a UK dstributor yet (which is a pity as they have good stuff).]]> sealing expansion gaps in oak frames https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=111802#Comment_111802 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=111802#Comment_111802 Thu, 23 Jun 2011 06:50:40 +0100 bens sealing expansion gaps in oak frames https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=111803#Comment_111803 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=7441&Focus=111803#Comment_111803 Thu, 23 Jun 2011 07:47:06 +0100 joe90
please post your thoughts and results of the different methods.]]>