Tuesday 3 July 2012

The roof is on

The roof is on - well most of it. The roof is being done in two stages. The main roofs are done and the awning roofs and where they intersect with the main roof will be done later. This is to allow for the hemp walls to be built behind the awnings. Watching the roof go on with all the flashings have thrown up a number of problems such as  - How we are going to build and detail the finish of the walls where the roof abuts a vertical hemp wall? - Can you put lime render over Colourbond flashing and if so how do we get it to stay and not crack?  - How will be build the funny bit between the hall roof and the main pavilion roof above it? These are questions I will have to do further research into and try to answer.

Monday morning work starts on roofing the back pavilion
 Strangely the roofers arrived Monday morning and only worked until 10.30am before going to finish another job. I wish someone had told me about this earlier. My plans were rearranged to stay on site the following day when the roofers returned. The roof is Colorbond Custom Orb (corrugated) in shale grey colour. It is hard to get a sense of the colour of the roof as in direct sunlight it looks almost white and in shade as dark as a mid grey, and various shades in between. The Custom Orb sheets are laid over a combined sarking and insulation called Kingspan Aircell Insulbreak. The house will also have further bulk roof insulation added between the rafters, just before the ceiling lining goes on.

Work continues on the main pavilion roof
Shale Grey in sun and shade

Tuesday morning was cold and my son and I took up a spot in the sun to watch the roofers continue with their work. By morning tea the main pavilion roof was on and by lunch all the roofing was on and they started on the barge capping and over flashings. A foamy strip precut to match the corrugated profile was installed under the top barge capping to prevent water or debris blowing up under the top of the roof due to the low pitch of the roof.

All roofing on and commencing the barge capping

The light played funny tricks with the colours of the roof and barge capping
With the roof on I could see the pattern of sunlight through the windows, although the scaffolding in the way created extra shadows. It was beautiful to see how the winter sun will stream through the windows, particularly the highlight windows above the north facing sliding doors.

The different shades of the fascia and barge capping can barely be seen in the bright sunlight


Midwinter sunlight streams into the back pavilion
The roof can hardly be seen

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