{"id":2249,"date":"2012-06-28T09:29:36","date_gmt":"2012-06-28T09:29:36","guid":{"rendered":"http:\/\/markstephensarchitects.com\/?p=2249"},"modified":"2012-06-28T09:29:36","modified_gmt":"2012-06-28T09:29:36","slug":"more-on-dominic-stevens-e25000-house","status":"publish","type":"post","link":"https:\/\/www.markstephensarchitects.com\/more-on-dominic-stevens-e25000-house\/","title":{"rendered":"More on Dominic Stevens \u20ac25,000 house…"},"content":{"rendered":"
Let’s look at yesterdays \u20ac25,000 house<\/a> in more detail. Remember this was a continuation of the blog post on building smaller<\/a><\/p>\n I’ve been looking at the irishvernacular.com plans<\/a> in more detail and I don’t think people are ‘getting’ what the current situation is; and remember (IMHO) I don’t think this is going to change for the next 10 years. I think therefore that self-builders haven’t grasped the importance of the principles of such a house; so the purpose of this blog post is to dispel a few misconceptions:<\/p>\n It’s not big enough:<\/strong><\/p>\n Have you looked at the plans? It’s a three bedroom house; perfect for a couple & 2 kids. There’s even a dressing room and double height void next to the main upstairs bedroom. Increasing the number of bedrooms would only increase the cost incrementally.<\/p>\n Will it be warm enough?<\/strong><\/p>\n I’ve checked the u values on the wall construction, and they’re at #Passivhaus standard, they also include all the airtightness required for current Building Regulations (subject to quality controls). here’s the calculation:<\/p>\n Thermal Transmittance (U-value) Calculation Report<\/p>\n Results for whole building<\/p>\n Would it get through Planning?<\/strong><\/p>\n If the house were to be built in County Mayo then the proportions, scale and materials hold the Rural House Guidelines<\/a> excellently; the plan depth is well under the 7.0m guide, the pitch is similar to the traditional rural house and the materials are already found in the locale. The photo below shows a house nearby with an identical roof and continuing the same surface on the walls is similar to the ‘barn sheds’ in the area; even the colour is what the planners would approve of:Overall results<\/h2>\n
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\n Elements<\/td>\n Area<\/td>\n U-value<\/td>\n<\/tr>\n \n <\/td>\n [m2]<\/td>\n [W\/m2 K]<\/td>\n<\/tr>\n \n \u20ac25,000 house wall<\/td>\n 1.0<\/td>\n 0.14<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \n\n
\n Average U-value [m2 K\/W]<\/td>\n 0.14<\/td>\n<\/tr>\n \n Total area [m2]<\/td>\n 1.0<\/td>\n<\/tr>\n \n Heat loss coefficient [W\/K]<\/td>\n 0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n Element details<\/h2>\n
\u20ac25,000 house wall<\/h3>\n
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\n Element type<\/td>\n Exposed element<\/td>\n<\/tr>\n \n Area [m2]<\/td>\n 1<\/td>\n<\/tr>\n \n U-value [W\/m2 K]<\/td>\n 0.14<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \n\n
\n Layers<\/td>\n Thickness<\/td>\n Conduct’y<\/td>\n Resistance<\/td>\n<\/tr>\n \n <\/td>\n [mm]<\/td>\n [W\/m K]<\/td>\n [m2 K\/W]<\/td>\n<\/tr>\n \n Internal surface resistance<\/td>\n <\/td>\n <\/td>\n 0.130<\/td>\n<\/tr>\n \n Plaster (gypsum, lightweight)<\/td>\n 3<\/td>\n 0.180<\/td>\n 0.014<\/td>\n<\/tr>\n \n Plasterboard<\/td>\n 13<\/td>\n 0.180<\/td>\n 0.072<\/td>\n<\/tr>\n \n Default air layer(2)<\/td>\n 35<\/td>\n <\/td>\n 0.100<\/td>\n<\/tr>\n \n Glass fibre\/wool batt(2)<\/td>\n 225<\/td>\n 0.035<\/td>\n 6.429<\/td>\n<\/tr>\n \n Oriented strand board (OSB)<\/td>\n 20<\/td>\n 0.130<\/td>\n 0.154<\/td>\n<\/tr>\n \n Default air layer<\/td>\n 50<\/td>\n <\/td>\n 0.100<\/td>\n<\/tr>\n \n Fibrous cement slates<\/td>\n 10<\/td>\n 0.450<\/td>\n 0.022<\/td>\n<\/tr>\n \n External surface resistance<\/td>\n <\/td>\n <\/td>\n 0.040<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
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