What is this trimmer timber for above Velux?

J

Jdwood38

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Morning all,

Just wondering if anyone can advise why there is this additional trimmer timber directly above two Velux we have? I can of course understand the doubled up timbers above and below, as well as the single timber directly above (for fixing plasterboard to) but just not sure on why there are these additional ones laid 'flat' above the windows? Only wondering as having them reduces the thickness of insulation that can be installed at this point. Hopefully photos show what I mean.

Thanks in advance for any thoughts.

IMG_7115.JPG
 
the position could have changed if they forgot about fire escape being lower than the preferred position for the window??
 
Thanks all for the responses, all make sense!

I guess next question is what purpose are they serving? I assume for providing something for the roof tiles to be supported by, but surely that would be achieved by the roof battens?

And subsequent question(s) to the above:

1) do we leave as is and just have slightly thinner insulation here?
2) remove and have full thickness insulation?
3) remove and take the opportunity to fit larger Velux (which would be nice, but not really necessary)?

Thanks again
 
A trimmer supports the trimmed rafter, not the tiles.

That timber above the velux is not a trimmer, just a noggin

That bit of 7x2 (?) flat has seemingly been put in to support the top apron flashing, but was/is unnecessary.
 
^woody^ said:
A trimmer supports the trimmed rafter, not the tiles.

That timber above the velux is not a trimmer, just a noggin

That bit of 7x2 (?) flat has seemingly been put in to support the top apron flashing, but was/is unnecessary.
Click to expand...
Thanks for clarifying the terminology woody - helpful as always.
 
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