Monday, June 6, 2011

Holiday Cottages Underway

So here we are starting a new and exciting adventure at East Cambusmoon. Three years ago we moved into our house, beautifully designed and immensely energy efficient, see here. We adopted a very low energy approach to the design and the construction detailing which focussed on significant levels of insulation, a high standard of air-tightness, strong passive solar design and a ground source heat pump for the heating and hot water, supported by a small PV array and mechanical heat recovery and ventilation. When we were at the design stage 4 years ago this approach was not widely taken but, even in the short time since we moved in, more people and architects are looking more broadly at how homes and buildings are managed environmentally. We joined the AECB and adopted their Silver Standard for energy use and carbon emissions. In truth the house has far out-performed this standard and even in the last particularly cold winter was warm all day every day at very low cost.





The main difference between the projects are that the house was a new build and the holiday cottages are a conversion of two very tired farm buildings. Notwithstanding our intentions to replicate some of the approaches we took with a brand new building we are very aware that we are renovating an old dairy and byre and will certainly be retaining the architectural features the buildings; the red sandstone which was quarried locally, the arch over the doorway and the window recess with wooden lintel. Here we are creating two adjoining holiday cottages, one of two bedrooms, one of four. As we are in Loch Lomond & Trossachs National Park we hope that some of the year-round visitors to this stunningly scenic area might like to come and stay in the cosy warm luxury of our holiday cottages. As you can see we're just starting the conversion works and we'll do our best to record the journey on this blog.



The building story so far has been one of rapid change. The roofs have fallen in and the rubble cleared out; in the stone building (which will have two bedrooms) the 'hole' for the sliding patio doors has been punched through and the stone stockpiled for reuse; in the larger unit, which was brick built in the 1950s, the walls collapsed so extra blockwork and labour will be required; floor levels were equalised as existing floors sloped. Then we get into the first stage of serious insulation - the floor. So much heat is lost through the floor, don't waste it!



In the past week 200mm of polystyrene and polyeurathane insulation boards have been laid throughout the buildings and on top of this will float 30 tonnes of steel and concrete in the 4 bedroom unit and 15 tonnes of the same in the two bedroom unit. Before the concrete is poured the underfloor heating pipes are installed; this is done by fixing the pipework (large diameter polythene pipe ideal for use with heat pumps) to the steel reinforcement mesh with tie-wraps. This approach works well with ground source heat pumps which have lower operating temperatures than the more frequently used shallow tray form of underfloor heating. The concrete provides the thermal mass necessary to stabilise the temperature and keep those cottages lovely and warm when needed.We're using Anderson Floorwarming for the underfloor heating, hot and cold water systems, installation of the ground source heat pump and solar. We are happily working with the same builder, subcontractors and architect as we did on the house so its nice to see familiar faces back on site.

3 comments:

auds said...

How exciting!I look forward to following the developments.

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