Warning Batsafe is NOT bat safe

[Wil]

Thank you yet again for the depth of response. 

 

Sounds like I need to go get some professional advice rather than relying on your kindness to respond. The fixings at length do represent a significant risk which is where my builder is nervous.

 

[sgt_woulds]

You should never rely solely on what you read on the interwebs... 🙂 

 

Plus my knowledge doesn't extend to WUFI software, unfortunately.

 

I have fitted solar panels to an externally insulated roof in the past.  From memory, the screws were 280mm long and even though the timbers were over 100mm wide we were extremely nervous about hitting centres.  We had a jig made that would hold the screws vertical to the face of the roof as they went in, and hired a pull-out rig, (used for testing 'man safe' systems) to ensure that each screw had hit its mark.  We also used extra fixings on the frames' outer edges for additional insurance.

 

It worked, but it was a total PITA and took an age to complete.

 

Nothing is impossible, but all options should be weighed up and thought through.

 

I'd be interested to know how you resolve this.