The extension

Having received the post supports for the extension and wanting to start the extension roof prior to fitting slates on the gable ends I decided to tackle this next. This was not a major task. Two purlins needed to be cut to length and halving joints cut to locate the purlins on the frame. The holes in the tenons needed to be marked and then the frame dismantled and holes drilled - pegs needed to be made. The extension frame could then be reassembled and the post supports concreted into the ground.

Post Supports

Post support in position ready for concrete

Once the frame was pegged it was necessary to start to clad the gable end of the shed and cut rafters for the extension. I decided to use the same colour paint for the gable ends as I did for the ceiling and just had enough tongue and groove already painted to finish the one end. 

Cladding on the first gable end (the orange cord is attached to the cut off bottom of a plastic bucket that sits on the stove flashing to keep out the rain).

Once the tongue and groove was in place I cut and fitted 50 x 75 mm  treated softwood battens to take the oak weatherboarding. 

I had decided to use 100mm x 50mm treated softwood for the rafters on the extension.

The gable end with 50 x 75mm battens fitted and 100 x 50mm treated softwood rafters positioned but not fixed on the extension roof

The next job is to fit 25mm x 25mm battens inside the frame to fix the insulation to. I will use wastage from the shed rafters cut into 25mm widths for this. The frame will be covered with breather membrane prior to cladding with weatherboarding.