Cladding summerhouse with softwood shiplap

[urbantus]

Im cladding my new summerhouse with 110 x12 mm softwood tprereated tongue and grooved shiplap


the shiplap has been stored outside for a week during the warm weather and seems quite dry

Do I fit the shiplap tight or leave a small gap in the tongue and groove

As some of the shiplap has cupped already I was going to fix it by means of one screw in the middle of each board

Does this seem ok

When cutting and fixing the shiplap should I treat the bare cut edges

Whats the best detail on the corners

The shiplap is being fixed on vertically fixed treated battens fitted to stirling board panels
The stirling boards are clad with breathable membrane fabric

Do I need to seal off the gaps between the vertical battens
Or just leave them open to ventilate the rear of the shiplap

Along the front edge of the summer house I intend to bolt a new decking joist to the summer house joist so I can erect an external decked area

How do I finish off the shiplap at the junction of shed and decking to avoid problems with rain water

Thx


Urby

 

[Shultzy]

Do I fit the shiplap tight or leave a small gap in the tongue and groove

Tight, as it will probably shrink some more.

As some of the shiplap has cupped already I was going to fix it by means of one screw in the middle of each board

I would use nails, unless you want to dismantle it in the future, use two as this will "flatten" the cupping and allow the next board to fit on.

When cutting and fixing the shiplap should I treat the bare cut edges

Yes.

Whats the best detail on the corners

Its usual to fit a vertical board to butt up to front cladding and to cover the end panel cladding.

The shiplap is being fixed on vertically fixed treated battens fitted to stirling board panels
The stirling boards are clad with breathable membrane fabric

Do I need to seal off the gaps between the vertical battens
Or just leave them open to ventilate the rear of the shiplap

You can leave it or fill with insulation.

Along the front edge of the summer house I intend to bolt a new decking joist to the summer house joist so I can erect an external decked area

How do I finish off the shiplap at the junction of shed and decking to avoid problems with rain water

The last cladding board should be at least 1/2" above the decking floor to allow any rain to drip off.

 

[urbantus]

Thx for advice

I might still screw the shiplap as I think Ill have more control that way

If I leave tha gap open at the bottomis there a danger of insect getting in behind the boards

or doesn that really pose a risk

Thx

 

[urbantus]