Sun, 25 Oct 2026 00:10:02 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79356#Comment_79356 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79356#Comment_79356 Sat, 03 Apr 2010 10:45:14 +0100 Mike George https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79360#Comment_79360 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79360#Comment_79360 Sat, 03 Apr 2010 13:23:32 +0100 squowse https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79422#Comment_79422 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79422#Comment_79422 Mon, 05 Apr 2010 15:53:27 +0100 tony and it isnt damp yet]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79425#Comment_79425 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79425#Comment_79425 Mon, 05 Apr 2010 16:23:43 +0100 Paul in Montreal
Paul in Montreal.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79471#Comment_79471 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79471#Comment_79471 Tue, 06 Apr 2010 09:20:28 +0100 owlman
Mike]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79487#Comment_79487 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79487#Comment_79487 Tue, 06 Apr 2010 11:02:42 +0100 owlman
But Paul, I understand not vapourproof. It's the water vapour that moves freely through concrete,]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79518#Comment_79518 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79518#Comment_79518 Tue, 06 Apr 2010 17:18:32 +0100 funcrusher
Paul: ordinary concrete is not waterproof. Permeability improves with density. (Waterproof concrete can be produced by special additives and manufacturing techniques - usually at local ready-mix plants under direction of specialist hired-in technicians)]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79521#Comment_79521 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79521#Comment_79521 Tue, 06 Apr 2010 17:26:47 +0100 Paul in Montreal http://www.epicuro.co.uk/uploads/waterproofconcrete.pdf shows how waterproof concrete can be produced and how it's cheaper than waterproofing regular concrete. I guess that concrete barge I saw in the River Humber years ago must have been made out of special concrete!

Paul in Montreal.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79523#Comment_79523 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79523#Comment_79523 Tue, 06 Apr 2010 17:53:24 +0100 squowse the outside tanking system is grace bituthene (i dare say there are other brand names). again it's the joints that are the problem. personally i would do the concrete top quality through supervision, joint strips and additives.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79524#Comment_79524 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79524#Comment_79524 Tue, 06 Apr 2010 18:36:14 +0100 dazza https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79601#Comment_79601 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79601#Comment_79601 Wed, 07 Apr 2010 19:34:52 +0100 Cassie
Do you want the greenest solution or the cheapest solution, and what soil type are you in?

Not sure on the greenest but we have looked into all sorts of solutions and I will happily offload - bit boring though!]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79619#Comment_79619 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79619#Comment_79619 Thu, 08 Apr 2010 00:39:02 +0100 Mike George https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79630#Comment_79630 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=79630#Comment_79630 Thu, 08 Apr 2010 11:12:22 +0100 Cassie
C]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=82487#Comment_82487 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=82487#Comment_82487 Sun, 16 May 2010 14:44:32 +0100 Crofty
I'm only building a semi-basement integral garage (1m below ground level) with a bedroom above, but have no idea how to make it waterproof. Thanks]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=82547#Comment_82547 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=82547#Comment_82547 Mon, 17 May 2010 18:28:36 +0100 Cassie
We used Grace Bithuthene 8000 with a drainage sheet ( which also acts as a protection barrier )but we got quotes from others. We never did get the quotes through from Visqueen for the torch on stuff.

The Grace product is like Blue Peter sticky-back plastic !

You brush on the bithumen, then peel of the backing of the membrane and stick it onto the bithumen, add the drainage sheet ( which is like mini plastic egg cartons) and backfill.

Sounds easy but the sticky membrane is very very sticky and it you get it in the wrong place, or catch something against it then is sticks instantly and you cannot peel it off and have another go.

I've got lots of info sheets etc so if you whisper your e-mail address I will send you some over.

Here's a photo so you can see what I mean]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=82551#Comment_82551 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=82551#Comment_82551 Mon, 17 May 2010 18:55:11 +0100 tony
presumably you have no problems?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=82552#Comment_82552 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=82552#Comment_82552 Mon, 17 May 2010 19:20:06 +0100 Cassie
On the other side of the concrete wall you can see, there is a cavity ( insulated ) and then internal skin. Then its my living space with MVHR and normal air movement caused by general living, doors and windows opening etc, passive solar and then woodburners, so all in all should dry out quickly and remain that way.

I will let you know if there are problems after being in there for a winter!

The tanking is to stop a potentialy large amout of water getting through that concrete wall, we are in heavy clay here, and there is no way on this earth I would have got mortgage funding without it.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=82553#Comment_82553 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=82553#Comment_82553 Mon, 17 May 2010 19:24:47 +0100 Paul in Montreal Posted By: tonyWhat happens to the moisture in the basement? -- concrete is vapour permeable and to me the vapour-proof layer should be on the inside?It stays in the basement ... or, really, it just enters the air in the conditioned living space.

Our (new) basement is treated in the same way - all the waterproofing is on the outside (again, due to high water pressure due to underground streams coming down a hill). Nothing on the inside, and nothing under the floor either for that matter. Everything is bone dry inside.

Paul in Montreal.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=82555#Comment_82555 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=82555#Comment_82555 Mon, 17 May 2010 21:37:47 +0100 ali.gill http://www.property-care.org/about-us/structural-waterproofing

(turn speakers down before clicking on 'online guide')]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=82579#Comment_82579 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=82579#Comment_82579 Tue, 18 May 2010 08:46:01 +0100 fostertom https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=82581#Comment_82581 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=82581#Comment_82581 Tue, 18 May 2010 08:57:04 +0100 Mike George http://www.bbacerts.co.uk/PDF/2278i2_web.pdf See page 5 detail for external tanking]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=83392#Comment_83392 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=83392#Comment_83392 Thu, 03 Jun 2010 13:22:42 +0100 bruce_thermonex https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=83619#Comment_83619 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=83619#Comment_83619 Tue, 08 Jun 2010 23:53:06 +0100 Rich T The visqueen is very sticky and once you've peeled off the paper backing and let it touch something, there's no going back. It is a two coat application which provides a homogenous coating.
Once we'd applied the visqueen it was then covered with a protection board to stop damage from things like stones etc.

On the inside of our wall we have used vandex BB75, which is great to put on, even for a couple of DIYers. It's permeable, and we will go on to vandex our foundation slab.
Our building inspector has been very keen for us to use this method of tanking.

Edit: We've also put in a top perforated drainage pipe along the bottom of the basement wall, and also one at approximately 400mm deep.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=209057#Comment_209057 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=209057#Comment_209057 Sat, 13 Sep 2014 11:04:47 +0100 basementexpert Concrete, waterproof concrete, is the only waterproofing measure that cannot be destroyed by others later.
The membrane in the photo above doesn't stand a chance against a digger backfilling or the wacker plate compacting the soil. There won't be any left.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=209067#Comment_209067 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5619&Focus=209067#Comment_209067 Sat, 13 Sep 2014 12:22:46 +0100 tony