{"id":5297,"date":"2015-02-24T15:58:12","date_gmt":"2015-02-24T14:58:12","guid":{"rendered":"http:\/\/www.theoillamp.co.uk\/?p=5297"},"modified":"2015-03-03T15:24:26","modified_gmt":"2015-03-03T14:24:26","slug":"lime-part-3-lime-plaster","status":"publish","type":"post","link":"https:\/\/www.theoillamp.co.uk\/?p=5297","title":{"rendered":"Lime part 3. Lime plaster"},"content":{"rendered":"
\"Downstairs<\/a>

Downstairs press with wallpaper coming off due to damp.<\/p><\/div>\n

In parts 1 and 2 of this occasional series on lime we looked at the background<\/a> to lime and the use of lime mortar<\/a> in re-pointing walls, today in the last\u00a0 parts we will look at the use of lime plaster.\u00a0 Warning- I have found this the most challenging of the lime materials to work with.\u00a0 Unlike re-pointing walls I have had to use tools such as floats (mostly a steel float).<\/p>\n

The reason why I wanted to use this is to insulate an “Edinburgh Press”.\u00a0 This is a shallow cupboard built into the wall, often with a door so it looks like it leads to a room.\u00a0 We have four of these.\u00a0 Two of these have caused no problem being on the boundary wall with our neighbours and therefore internal.\u00a0 The other two, one upstairs in our lounge and the other downstairs in one bedroom have had huge damp problems.\u00a0 The upstairs one had a door, we removed this and gave it to a homeless charity (this only gave modest damp improvements).\u00a0\u00a0 The problem is they cut into external wall and act as a “cold bridge”, that is an area of heat loss which leads to a build up of condensation.\u00a0 My attempts at insulating both presses with non-breathable insulation failed.\u00a0 They were still damp and had Aspergillus niger <\/em>growing (which is an increasing health hazard) effectively making them unusable as shelves.<\/p>\n

I needed a solution and my first thought was to brick the ground floor press up.\u00a0 As a last resort in 2011 I rang Historic Scotland who in those days had a free advice line.\u00a0 They recommended calcitherm and told me how to use it. I rarely mention products by name and I’m certainly not being paid for it, but its hard to avoid and this is one I would highly recommend.\u00a0 Essentially calcitherm is a breathable board formed of calcium silicate through a chemical reaction, it is then dried and compressed.\u00a0 Its highly insulating keeping heat in but letting water vapour out.\u00a0 Basically its use is as follows.\u00a0 Skim a layer of flat lime plaster onto the surface you are going to mount the board on (in my case stone), stick the calcitherm on with special breathable glue, then skim another layer of lime plaster on top and paint this either with breathable paint (or better still lime wash).<\/p>\n

All this will be described later on this blog site.<\/p>\n

Neil<\/p>\n","protected":false},"excerpt":{"rendered":"

In parts 1 and 2 of this occasional series on lime we looked at the background to lime and the use of lime mortar in re-pointing walls, today in the last\u00a0 parts we will look at the use of lime … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[37,28,15,16],"tags":[95,75,93,94],"class_list":["post-5297","post","type-post","status-publish","format-standard","hentry","category-energy-conservation","category-other","category-practical-low-carbon-living","category-transition","tag-calcitherm","tag-lime","tag-lime-plaster","tag-lime-wash"],"yoast_head":"\nLime part 3. 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