Thursday 7 October 2010
Cottage renovation Part 2
Work is progressing on the cottage renovation. The project is behind programme, not helped in this instance by Tipperary winning the All Ireland Hurling Final: direct labour projects by their nature seldom go according to programme, as one is at the mercy of the sub-contractors, many of whom know that it will be the one and only time they will encounter that individual self-builder, unlike working for a building contractor.
At this stage the blockwork is complete. There is some work required around the existing opes, however this work is underway, mainly comprising of adjusting the cill levels, tidying up around the location of the former heads. New heads were cast as part of the band beam at first floor level. Cold bridges normally caused by band beams have been avoided in this instance with the used of external insulation.
The carpenter is due early next week to complete the first floor and commence the roof. While this will be going on, the windows and doors will be ordered(black uPVC has been selected) and installed prior to the installation of the external insulation and render. The external wall u-values have been calculated at a respectable least 0.22W/m2 using a thickness of 120mmof EPS insulation.
Consideration is currently been given to insulating the roof space along the line of the rafter right up to the ridge, creating a warm roof. I’m currently looking at the prop and cons of this, one major advantage of this method, which the clients sees, is of course the risk of frozen water pipes or a water tank is greatly reduced. The fact that there shouldn’t be excessive temperate differences in the attic, compared to the rest of the house, both in winter and summer, is also another factor wish is attractive to the client. Cost however may prove prohibitive… Kingspan, Xtratherm, Aeroboard, anybody?