When and who to felt roof?

[boxrick]

I am in the process of sarking my roof with Steico Universal 22mm wood fibre boards.
 

One thing I am trying to decide is the best approach for the roof membrane.

My joiner is currently on site and plans to  staple the membrane on top of the sarking boards as he goes. The alternative is to leave this step for the roofer when he arrives, which would mean potentially fewer staple penetrations in the membrane but means I have to wait longer to be watertight

 

Any thoughts around this?
 

Edited 22 hours ago by boxrick

[Redbeard]

Is this habitable space or a garage/outbuilding? And I assume the membrane is a breathable membrane to go under tiles or slates, not a 'flat roof' membrane such as EPDM or felt. Can you confirm? If it is to be battened and tiled or slated I'd say get the joiner to staple the membrane, unless you know the roofer is coming before it rains!

 

On a related note (I am not a roofer) are you/is the roofer using counter-battens?

 

 

[Iceverge]

I wouldn’t be too fussy either way. 
 

The steico boards should be watertight for a few weeks on their own and staple holes aren’t a massive issue if you have no rips.

 

Best plan I think is to get your jointer to put the membrane on but keep the staples to the top of the membrane on the slope where they would be under the  overlap from the upper membrane or put them in line with the rafters so they’d be covered with the counter battens later. 
 

Try to keep the staples “in the open “ to where there is an overlap of membrane. 
 

Probably complete over kill to be honest.

Edited 21 hours ago by Iceverge

[SBMS]

Our joiner did it. Stapled a bit to hold but then the battens are the actual thing that mechanically fixes the membrane to the sarking. The staples are almost temporary and I think could be skipped if it’s a still day and you’re battening as you go??