The rear wall

The tongue and groove timber for the rear wall was painted over 4 days - and fitting was fairly easy. 75mm x 50mm battens were screwed to the frame with stainless steel screws and 25mm x 25mm battens fixed inside each frame - insulation was stapled to the 25mm square battens and breather membrane secured on to the 75mm x 50mm battens. (See previous post Gable end and extension – 7 July 2013)

Internal rear wall of the shed and extension

It will be necessary to infill between the rafters and ceiling with short lengths of tongue and groove prior to fitting the oak feather edge.

I did not fit an internal wall to the end of the extension only covering the oak frame with breather membrane. I did fit an internal wall to the rear of the extension to maintain a line with the rear of the shed but this was not insulated.

With the membrane over the end of the extension the oak feather edge could be fixed.

Oak feather edge fitted to the end of the extension

Detail of front end 

I have now begun to paint the tongue and groove timber for the end walls and think about ordering the large glass panels for the front and end corners. The glass will be fitted to the face of the frame using softwood packing and air dried oak strips - EDM sealing tape has been ordered from Reddiseals

Finishing the extension roof

The oak fascia was attached in the same was as on the shed. Once this was completed the membrane, Permavent Easytray, battens and the lead flashing could all be fitted. The height of the extension meant that the join of the roof to the shed wall overlapped the gable end. As a result of this there was a "step" in the roof/shed connection that required some cutting and shaping of the lead. The scaffolding was moved to allow access and slates were fitted to the roof.

Fascia, membrane and battens fitted

The extension roof nearly completed

 With the roof completed it was now possible to finish the gable end by fixing the oak feather edge. The boards were quite heavy so it was necessary to temporarily bang a nail in at the correct height one end to support the board whilst the other end was nailed.

The Gable end and extension roof finished

With the boards fitted the slates could be attached to the gable end. The next job is to paint and prepare the boards for the walls.

Gable end and extension

After fitting the 25mm x 25mm battens the insulation could be fixed. This was a straightforward job using offcuts from the roof. This was then covered with breather membrane (as used on the main roof).

25mm x 25mm counter battens for insulation

Insulation fitted to counter battens

I made and fitted a treated softwood frame to fit in the top of the extension - this was a simple way of providing a secure foundation to attach the weatherboarding. The next job is to complete the roof on the extension.

Softwood frame fitted to extension

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.

Finishing the roof

With some good weather allowing progress to be made the roof is now finished with ridge tiles in place and stove flue fitted. 

Detail of the lead flue flashing - partially fitted.

Finished roof