Installing a roof window at wall plate height?

[Digmixfill]

The typical roof window install is cut a rafter, double up the rafter either side of the opening and install double horizontal timbers to carry the cut rafter. Image from Fakro install doc attached.

 

All of the installations I can find show installation in the middle of a roof. Our upper story has 1.6m walls. I want to install the window as low as possible, as close to the rafter wall plate as I can. Fitting the lower doubled up horizontal timbers right next to the wall plate takes up space which i'd like to avoid. 

 

Anyone installed a roof window low down in a roof, up against a wall plate?

 

[Nickfromwales]

Your issue will be the lower flashing, and how close you can take that to the gutter.

[dpmiller]

would it be easier if you did a matching wall window attached to it- is there a worthwhile view?

[torre]

It might be worth asking Fakro themselves about flashings. Alternatively might their combination windows be an option for you? The sloped window meets a vertical directly at that junction. Velux do similar.

[Alan Ambrose]

Don’t know if this helps any - it’s fairly common to bevel the plasterboard below and above the window. (We have ours bevelled in all 4 directions, but that’s a bit of a faff.) Would that help your objective?

[Digmixfill]

7 hours ago, Nickfromwales said:

Your issue will be the lower flashing, and how close you can take that to the gutter.

 

I think there will be enough distance between wall plate and gutter for flashing. We have very deep corbelled eaves.

 

 

7 hours ago, dpmiller said:

would it be easier if you did a matching wall window attached to it- is there a worthwhile view?

 

It's a maybe. Not sure how we would stand with planning for that though.

 

7 hours ago, torre said:

It might be worth asking Fakro themselves about flashings. Alternatively might their combination windows be an option for you? The sloped window meets a vertical directly at that junction. Velux do similar.

 

Worth an email to them to see if they have anything.

 

6 hours ago, Alan Ambrose said:

Don’t know if this helps any - it’s fairly common to bevel the plasterboard below and above the window. (We have ours bevelled in all 4 directions, but that’s a bit of a faff.) Would that help your objective?

 

I was planning to splay top and bottom. Is splaying the sides worth the effort??

 

 

Pictures might help:

 

 

 

Edited March 10 by Digmixfill