On Jan 20, 8:34*pm, Kipper at sea wrote:
On Jan 20, 5:41*pm, Chris Wilson wrote:

Kipper at sea wrote in news:77b2da60-93e5-400b-
:

timber shiplap boards, underneath is a layer of breather roofing
underlay all the way round and including the roof and floor.

Cool, so it's skin, underlay then insulation in that order. Have you put an
internal skin on the walls/roof or have you left the underlay exposed?

--

All the best,

Chris

I visited a few timber shed makers and one in partially had the idea
of covering the ends & sides of the timber frame with tar paper on the
out side then fixing the ship lap boards on to the timber frame. So I
decided to use this company but supplied them with a roll of roof
shield breather underlay. They covered all sides, ends and the roof.
after they had erected the shed I filled all the gaps between the
frame on the inside with insulation and ply boarded over.I was going
to use plaster board for the inside but decide it would make it more
secure to use 12mm ply. The surplus underlay I covered the floor with
and then covered with insulation and clip flooring. The roof on the
inside I cut sheets of insulation and tight fitted them in the frame
of the inside of the roof up to the underlay and held it in with nails
driven into the frame sides not through the insulation. One thing I
did do was to raise the concrete base above ground level and make the
base small enough to fit inside the ship lap board so the rain would
not run under the floor supports.

Don’t use tin roofing of fibre cement sheets they are known for
condensation. Stick to a top quality heavy duty bitumen granule felt
fix to t&g boards.