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Cathryn



Joined: 16 Jul 2005
Posts: 19856
Location: Ceredigion
PostPosted: Thu Jan 15, 15 10:07 am    Post subject: Reply with quote
    

Gervase wrote:
'Rising damp' is a myth peddled by the damp industry - penetrating damp is the usual problem. Injected DPCs do not work on rubble stone. Anyone who tries to sell you one will be relying on the tanking inside to keep the damp at bay - but after three years or so you'll see it reappear about three feet above floor level, where the tanking stops.
And if they offer a guarantee, smile and move on. I've never known any damp company honour a guarantee. Most go bust or reconstitute themselves every few years to avoid paying out.
French ditch, land drain, below ground tanking and breathable materials is the way to go.


We agree and especially because the floor is fabulous after about 150 years. About two generations ago the walls on the outside and inside have been sealed. As a result the wall is coming off above this level as the water has simply filled up in there and come over the top.

Cathryn



Joined: 16 Jul 2005
Posts: 19856
Location: Ceredigion
PostPosted: Thu Jan 15, 15 10:21 am    Post subject: Reply with quote
    

wellington womble wrote:
I have no words of wisdom about damp (except move, but I presume you'd rather live with jack and he's unextractable) but sympathy with renovations of all kinds. There's always a finished room here if you need a break...


Thank you!

We have several years of this but because we are doing the reverse of what dpack suggests we will be able to do this work more or less room by room.

We have had long chats with Vegplot about this as well. We always favoured his advice but thought it would cost far too much, thankfully it won't and we can do the other work when the rooms are dried out and when we can afford it.

There's talk of biomass which I am not in favour of unless the talk of some new approach which means we can use our own woodland as we do now is actually for real. I am also going to look into a new type of heating which has been researched for several years by Swansea University for the company involved and is shortly to be trialled in houses in Bristol. This uses thin carbon layers so it could be in a picture, mirror whatever and is activated with a minimal amount of electricity that could be provided by solar panels. It warms the solid objects in the room, people, tables, things rather than the air itself. It sounds interesting but we will have to see. No more leaking radiator pipes.

dpack the walls are built with boulders from the beach and the cement is undoubtedly made with beach sand. It is very exposed here (and as a result, beautiful). Because of these circumstances making the outside waterproof and adding to the heat store or cool store that is the house makes sense.

dpack



Joined: 02 Jul 2005
Posts: 38887
Location: yes
PostPosted: Thu Jan 15, 15 11:44 am    Post subject: Reply with quote
    

fair points re boulders and dubious mortar,thing is the waterproof and insulating layers on the outside that i have seen round here(although slightly different as they are over brick)seem to have made internal damp worse.
if there is no water wicking up all will be fine ,if there is it will get out somewhere.the modern low pressure injection compounds that are for treating the mortar rather than the brick/stone isnt very expensive and might add to a belt and braces approach.
preventing water penetrating from outside is sensible and the ditch ,gully or whatever is a very good move

that the floor is dry does point to most of the water coming in rather than up

12Bore



Joined: 15 Jun 2008
Posts: 9088
Location: Paddling in the Mersey
PostPosted: Thu Jan 15, 15 12:43 pm    Post subject: Reply with quote
    

Cathryn wrote:
I am also going to look into a new type of heating which has been researched for several years by Swansea University for the company involved and is shortly to be trialled in houses in Bristol. This uses thin carbon layers so it could be in a picture, mirror whatever and is activated with a minimal amount of electricity that could be provided by solar panels. It warms the solid objects in the room, people, tables, things rather than the air itself. It sounds interesting but we will have to see. No more leaking radiator pipes.

Is that somehow related to this?
https://www.iqglass.com/press_releases/09_21_06.html

Behemoth



Joined: 01 Dec 2004
Posts: 19023
Location: Leeds
PostPosted: Thu Jan 15, 15 12:47 pm    Post subject: Reply with quote
    

[quote="12Bore:1427675Is that somehow related to this?
https://www.iqglass.com/press_releases/09_21_06.html[/quote]

Does that mean you cant close your curtains?

Cathryn



Joined: 16 Jul 2005
Posts: 19856
Location: Ceredigion
PostPosted: Thu Jan 15, 15 1:17 pm    Post subject: Reply with quote
    

This https://www.matildasplanet.com/our-products/hotfish.aspx

Do not quote me on the technology. (I needed to add that didn't I. )

Cathryn



Joined: 16 Jul 2005
Posts: 19856
Location: Ceredigion
PostPosted: Thu Jan 15, 15 1:18 pm    Post subject: Reply with quote
    

Behemoth wrote:
[quote="12Bore:1427675Is that somehow related to this?
https://www.iqglass.com/press_releases/09_21_06.html


Does that mean you cant close your curtains?[/quote]

Is this link supposed to lead to one of those sort of pages?

wellington womble



Joined: 08 Nov 2004
Posts: 15043
Location: East Midlands
PostPosted: Thu Jan 15, 15 2:36 pm    Post subject: Reply with quote
    

Cathryn wrote:
This https://www.matildasplanet.com/our-products/hotfish.aspx

Do not quote me on the technology. (I needed to add that didn't I. )


That looks very exciting. I wonder if it works? It would be amazing if you could retrofit underfloor heating without all the faff. I miss my underfloor heating. I always understood that any low heat system needed really good insulation to work well - is that still the case? And I wonder how you plug them in?!

onemanband



Joined: 26 Dec 2010
Posts: 1473
Location: NCA90
PostPosted: Thu Jan 15, 15 3:07 pm    Post subject: Reply with quote
    

Gervase wrote:

And if they offer a guarantee, smile and move on. I've never known any damp company honour a guarantee. Most go bust or reconstitute themselves every few years to avoid paying out.


Look for an insurance backed guarantee

Cathryn



Joined: 16 Jul 2005
Posts: 19856
Location: Ceredigion
PostPosted: Thu Jan 15, 15 4:09 pm    Post subject: Reply with quote
    

wellington womble wrote:
Cathryn wrote:
This https://www.matildasplanet.com/our-products/hotfish.aspx

Do not quote me on the technology. (I needed to add that didn't I. )


That looks very exciting. I wonder if it works? It would be amazing if you could retrofit underfloor heating without all the faff. I miss my underfloor heating. I always understood that any low heat system needed really good insulation to work well - is that still the case? And I wonder how you plug them in?!


It works at an experimental level apparently. Have to see what it is like in houses. It's going to look traditional at first, like radiators then I think imagination is the limit. And no mention yet of price.

henchard



Joined: 23 Aug 2012
Posts: 232
Location: Carmarthenshire
PostPosted: Thu Jan 15, 15 4:50 pm    Post subject: Reply with quote
    

We had minor damp coming through our stone walls (the floor has a dpm).

So a channel was cut in the concrete slab parallel to the wall and damproofing membrane pinned to the internal walls. Any damp that does get through then drains down below the slab. The cut part of the slab is made good with resin.

With luck you can see it (looks a bit like bubblewrap) fixed to the outside walls in the photo below (before the wall is insulated and plastered or the the screed is laid).

It seems to work well. BUT the damp was minor and ground level is not high like yours.


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