French door in garden room

[Jupiter01]

I've managed to source a set of french doors which are 207cm high. That's the measurement of the frame and without a sill.
My challenge now is that, to keep within the 2.5m permitted development my front wall can be a maximum of 220cm. This allows me to get 2 5x2's (bolted together) above the door to get to the 220cm. This gives me a few mm for adjustment of the door. My roof will be extending 0.5m above this door.

Is it an issue to have this door fitted without a sill and will the 2 5x2s handle the door opening and weight of the 5x2 rafters and the rubber roof?
I'd appreciate any thoughts on this.

 

[Jupiter01]

Morning, I'd appreciate any thoughts on the above please. Thanks again.

 

[HomeESSWindows]

Hi, I'm from Home Energy Saving Solutions (we fit windows and doors around Manchester and Yorkshire), so bear that in mind, but no sales pitch here.
On the sill, I wouldn't fit an external French door without one. The sill is what throws rainwater away from the bottom of the frame. Without it, water running down the glass and the door leaves tends to collect on the bottom of the frame and find its way into the floor and the timber underneath, which is the last thing you want in a garden room. If height is what's stopping you, ask your supplier whether that door system has a sill that fixes onto the bottom of the frame. On a lot of systems it does, and it adds very little height. Bed it on a solid, level base with a slight fall outwards and seal it properly underneath.
On the two 5x2s, I'd be wary of anyone giving you a yes from a description. A pair of French doors is a fairly wide opening, and that header has to carry the rafters and the roof over the whole span, so it really depends on the span, the timber grade and how the rafters sit on it. A structural engineer, or a timber merchant who does span tables, can tell you quickly, and they can suggest something like a steel flitch plate if you can't go any deeper because of the 2.5m limit.
One more tip: the door frame itself shouldn't carry any load. Leave a small gap between the top of the frame and the header, pack it at the fixing points and seal it, so if the header settles a little the doors don't start binding.
Hope that helps.

 

[Jupiter01]

Hi, I'm from Home Energy Saving Solutions (we fit windows and doors around Manchester and Yorkshire), so bear that in mind, but no sales pitch here.
On the sill, I wouldn't fit an external French door without one. The sill is what throws rainwater away from the bottom of the frame. Without it, water running down the glass and the door leaves tends to collect on the bottom of the frame and find its way into the floor and the timber underneath, which is the last thing you want in a garden room. If height is what's stopping you, ask your supplier whether that door system has a sill that fixes onto the bottom of the frame. On a lot of systems it does, and it adds very little height. Bed it on a solid, level base with a slight fall outwards and seal it properly underneath.
On the two 5x2s, I'd be wary of anyone giving you a yes from a description. A pair of French doors is a fairly wide opening, and that header has to carry the rafters and the roof over the whole span, so it really depends on the span, the timber grade and how the rafters sit on it. A structural engineer, or a timber merchant who does span tables, can tell you quickly, and they can suggest something like a steel flitch plate if you can't go any deeper because of the 2.5m limit.
One more tip: the door frame itself shouldn't carry any load. Leave a small gap between the top of the frame and the header, pack it at the fixing points and seal it, so if the header settles a little the doors don't start binding.
Hope that helps.

Thanks for the response.
The french doors came from Facebook marketplace and it was a case of getting what was available. The doors are 207cm high and 145cm wide. Does that provide additional context around the two 5x2s that I am plannig to use as a header for this?

I understand your point re sill. In my situation, I am thinking of sticking on two pvc drips on the doors. I was planning to foam and seal the 5mm gaps around all four sides of the door.

Let me know if you have any further thoughts.