I guess someone will tell me that the easiest way is to buy this wonderful plug-in of some kind, but unfotunately I don't have that luxury as whilst my boss loves what I can do with Archicad, is so computer iliteterate trying to explain to him why he needs to spend £200 so that I can draw the odd thatch roof when he's spent £3000 on a CAD system, actually makes drawing the roof easy in comparison. Mesh to roof I'd never used before and having tried it seemed to me like it could of been a big headache again trying to achieve the right look. I found difficult as it was tricky to work out how you needed to trim the roof for the right look, whilst still trimming your walls to the roof and not leaving odd gaps etc. Using the roof tool and then trimming it with custom profiles etc. I was just wondering in general (as I'm not changing it now ) has anyone else modelled a thatch roof in Archicad and if so have you any pointers or observations etc. Now after much experimentation and head scratching I've managed to create a satisfactory result so far as modelling the thatch roof, because of it's natural curves and rough lines I've settled for using a custom profiled wall to create my roof and with some trimming and playing around the sketch renders and my lightworks look ok especially with shadows on, but for my 2D elevations I will simply use a fill to further enhance the detail. The pitches of the roof need to be more sloping than slate roofing, to better let the weight of the snow slide, which it would not have held up for a long time.įor good coverage 25kg of rye straw is required, a paltry weight for an underlying structure in dry masonry or completely in wood if for rural use.I'm currently working on a project which is an extension to a Listed Cotswold thatched cottage. The ridge line is the most delicate area of coverage, both for the discontinuity of the line and for exposure to the elements: for this reason there is a thicker straw layer and it is blocked by two strong bars that press it. Moreover, the easy flammability of the material made it necessary to use various stratagems for the construction of chimneys and flues.Ī typical roof frame is composed entirely of wood (main, secondary, ridge beams, chords and frontispieces or, in the absence of the latter, of the archaic type), on whose slats the straw is tied, superimposed on successive rows according to the ” vertical “or “horizontal”, method, the latter being more widespread. The preparation of sheaves for use as a roof covering often took several years, but the coverings made with this technique were quite durable, lasting over 25 years, and well insulating. None of the rye was wasted: the kernels were used for the flour, and the stems for the frame of the roofs.ĭuring the last century, the method used for threshing grass culms changed several times if flails were used before, the second post-war period had switched to using motorized threshing machines. This was because there were no shale rock quarries on the territory, that is, easily breakable for the creation of slates, while rye straw was easily found as a secondary product of the cultivation of food-use cereals. As can be seen from the location of these aggregates, the construction technique of the thatched roof was practiced everywhere in Val Vermenagna.
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