Drilling holes?

[dokkan1080]

Can these be drilled?

The diagonal beams going up to the roof that is?

 

[OnlQQker]

Look like 4x2 (95mm x 45mm) rafters to me. Tile baton and roof tiles the other side I imagine.



20 mm max hole through the centers should be fine. Though if the roofer has used 3" nails to fix the tile baton you may come across them!

 

[GBDamo]

Can these be drilled?

The diagonal beams going up to the roof that is?View attachment 62496

Has it to be boarded?

 

[dokkan1080]

Has it to be boarded?

Yes Needs to be boarded

 

[dokkan1080]

Look like 4x2 (95mm x 45mm) rafters to me. Tile baton and roof tiles the other side I imagine.



20 mm max hole through the centers should be fine. Though if the roofer has used 3" nails to fix the tile baton you may come across them!

I thought but I'm not sure you could drill rafters though?

 

[GBDamo]

Yes Needs to be boarded

If the roof has been battened and tiled the id be tempted to drill high of center to avoid the boarders screwing in.

Yes they should use a 25/32mm screw, in truth they use whatever comes to hand.

 

[Mike Johnson]

What is the span of them, dimensions between walls and rake of rafter, because they look undersize to me.

 

[Dustydazzler]

I personally don’t like drilling roof rafters

 

[Mike Johnson]

The rafters look as though they have been compressed at the point of contact with the wall plate, I don't understand that junction?

 

[dokkan1080]

I personally don’t like drilling roof rafters

Thats how i feel but is it allowed

 

[telectrix]

can you not run cables along the top of the wall, on that horizontal timber, then clip up side of rafters?

 

[Zerax]

Also... if there's board going on the top of those rafters... I'd imagine there's some insulation going in there too ? Celotex ? How's that going to work with your cables ?

 

[DefyG]

Generally frowned upon, but had a similar dilemma on a job so double checked with building inspector who agreed as long drilled on centre line! 16mm dia as I recall as only one cable. Also 130mm rafters if I remember!

 

[Mike Johnson]

Looking at the sag in the breathable membrane I would think you could get any cables over the top of the rafters, much better than drilling any rafter let alone one that looks undersize.

 

[dokkan1080]

Also... if there's board going on the top of those rafters... I'd imagine there's some insulation going in there too ? Celotex ? How's that going to work with your cables ?

Due to de rating factors?