Expansion gap on tongue and groove garden gate

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I'm building a garden gate using pressure treated tongue and groove boards that 15mm x 100mm and nailed down using round galvanised nails.

How much of an expansion gap should I leave between the boards?

Should they be fitted tight or do you leave an expansion gap.
 
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Depends on design off gate but i allow 2mm between planks iff ultra dry and a 12mm all round the the edge with a 19-25mm gate stop
as an aside
15x100mm planks will be perhaps 12mm thick and 88mm coverage, so keep this in mind
 
Joined
25 Dec 2013
Messages
157
Reaction score
1
Location
Manchester
Country
United Kingdom
Depends on design off gate but i allow 2mm between planks iff ultra dry and a 12mm all round the the edge with a 19-25mm gate stop
as an aside
15x100mm planks will be perhaps 12mm thick and 88mm coverage, so keep this in mind
gate is a ledge and brace design
 

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