Green Building Bible, Fourth Edition |
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment. PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book. |
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Posted By: mr_magicfingersadding insulation to the solid wall is probably only going to make the damp wall worse plus would make it even smaller.
Posted By: fostertomConsider a dehumidifier, must be the new dessicant type, not trad compressor type
Posted By: mr_magicfingersThanks for that. This afternoon I stripped some of the concrete render off the outside wall, a piece about 8x6'. The wall inside is damp, the mortar can be scraped with your fingertips. I think the next few weeks will see me taking it all off and assessing whether to just leave it off to dry out or render in lime. Fortunately Mike Wye is 10 miles from here and we'll be getting him round to give us some advice.
Posted By: mr_magicfingersstripping the render patch off I found that the walls in that area are stone rather than cob, the cob may be higher up but I need to rent a scaff tower to get up there. Might change plans a little but the idea is the same I think. Also, yes, the rain is howling across the tops at us so that wall is now pretty soaked.
For the insulation, do you mean fix it to the back of the kitchen units and have a gap between it and the wall? That's a possible option I think, will have to take a better look at potential units.
Thanks for the suggestions.
Posted By: Peter_in_HungaryI thought the compressor type were more efficientCompressor type was developed for humid tropics - performance optimised for 30C and 80%RH but falls off very steeply to almost useless in temperate winter climates. Dessicant type maintains efficiency almost flat, right down to 0C and at lower RH. Dessicant type have higher electrical rating but if so equipped, e.g. Meaco, in theory reduce RH much quicker to set level and switch off automatically, so use less elect (but also therefore provide less 'incidental' space heating).
Posted By: fostertomSo it's useless to try to reduce RH below outside RH.It's useless to try to reduce AH (absolute humidity in g/kg or g/m³) below outside but you ought to be able to get the RH down if inside is warmer.
Posted By: fostertomBeware that 'more ventilation' (not the extract but the consequent drawing in of outside air to elsewhere) in many conditions simply imports more water vapour to endlessly condense.
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