Mon, 18 May 2026 08:35:17 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156528#Comment_156528 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156528#Comment_156528 Mon, 17 Sep 2012 10:17:19 +0100 WillInAberdeen
The joiners put some nice straight skirting boards on. So there are wavy gaps, both behind and below the skirting, up to 5mm in places, the wind coming through.

First step was to remove skirting boards. There is a 12x25ish mm void where the bottom of each plasterboard is lifted above the floor, I filled this void with squirty foam. But when I trimmed the excess foam off, found that it had not bonded well to the concrete, big bubbles make voids between concrete and foam, not very airtight.

Next step was to refix skirting boards with stupidly large beads of caulk behind and below. This stopped the gap but looks a bit of a bodge.

How should I have done this right? How does everyone else seal junction between stud walls and concrete slab?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156532#Comment_156532 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156532#Comment_156532 Mon, 17 Sep 2012 10:32:50 +0100 Nick Parsons https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156536#Comment_156536 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156536#Comment_156536 Mon, 17 Sep 2012 11:01:52 +0100 WillInAberdeen
Existing granite is to keep rain out and support the roof. New timber layer is to provide insulation, VCL and airtightness functions. But needs to seal onto floor slab.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156540#Comment_156540 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156540#Comment_156540 Mon, 17 Sep 2012 11:49:49 +0100 Ed Davies
But you still need a windtightness layer outboard of the insulation (which could be just the outer surface of the insulation if that's suitably solid) to prevent air movement within the insulation from bypassing its insulating effect. It's that that Nick's commenting on the apparent absence of.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156542#Comment_156542 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156542#Comment_156542 Mon, 17 Sep 2012 12:01:19 +0100 WillInAberdeen
How to seal the gap between to the floor at the skirting board junction??]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156543#Comment_156543 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156543#Comment_156543 Mon, 17 Sep 2012 12:08:18 +0100 davidfreeborough
Has the polyethylene already been cut back?

David]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156591#Comment_156591 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156591#Comment_156591 Mon, 17 Sep 2012 20:48:16 +0100 WillInAberdeen https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156600#Comment_156600 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156600#Comment_156600 Mon, 17 Sep 2012 23:30:09 +0100 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156613#Comment_156613 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156613#Comment_156613 Tue, 18 Sep 2012 07:44:09 +0100 Seret https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156618#Comment_156618 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156618#Comment_156618 Tue, 18 Sep 2012 08:22:37 +0100 davidfreeborough
http://www.tremco-illbruck.co.uk/products/00767_index.html

SIGA Rissan tape is suitable for bonding floors to walls:

http://www.siga.ch/en/product-overview/rissan-100-150-detail.html

Alternatively you could use a butyl rubber or EPDM tape.

David]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156620#Comment_156620 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156620#Comment_156620 Tue, 18 Sep 2012 08:39:04 +0100 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156648#Comment_156648 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156648#Comment_156648 Tue, 18 Sep 2012 18:11:27 +0100 Ed Davies https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156649#Comment_156649 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156649#Comment_156649 Tue, 18 Sep 2012 18:27:56 +0100 Nick Parsons https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156650#Comment_156650 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156650#Comment_156650 Tue, 18 Sep 2012 18:32:29 +0100 davidfreeborough
David]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156652#Comment_156652 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156652#Comment_156652 Tue, 18 Sep 2012 18:48:54 +0100 Ed Davies Posted By: davidfreeborough...but probably wouldn't be good value as the cavity is open to the roof.
Good point - I'd missed that bit.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156655#Comment_156655 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156655#Comment_156655 Tue, 18 Sep 2012 20:27:02 +0100 Chris P Bacon https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156664#Comment_156664 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156664#Comment_156664 Tue, 18 Sep 2012 23:06:57 +0100 Timber
As for a fix now, it will be a matter of sealing the vcl to the slab in some way. How is a more difficult thing to answer and will likely involve some membrane (like DPC), and some adhesive to bond it to the slab, and then lapped with the timber frame walls and seald.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156669#Comment_156669 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156669#Comment_156669 Wed, 19 Sep 2012 07:28:47 +0100 Chris P Bacon https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156681#Comment_156681 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156681#Comment_156681 Wed, 19 Sep 2012 10:33:08 +0100 WillInAberdeen The bottom of the granite walls has been lined with torched bitumen felt and the new dpm lapped onto this for damp proofing, we had to dig below gnd level to make depth for the floor insulation.
I was not keen to parge the granite internally as it absorbs a certain amount of rain, AIUI the ventilated cavity helps penetrating rain to evaporate or drain.
The insulation is foil faced kingspan so wind penetrating the insulation not a problem I hope.
It would have been neat to seal the vcl onto the slab, wish we had thought ahead and not trimmed it, looking into tapes instead!
Will]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156684#Comment_156684 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9578&Focus=156684#Comment_156684 Wed, 19 Sep 2012 12:42:46 +0100 tony