30cm roof overhang at the gable without visible rafters / mounting board

Hello.

Since I don’t want any visible rafters or visible purlins on the outside of the gable, I am considering whether this can work.

The roof structure is "cold" the ceiling is insulated.

The text notes the following:

- Roof overhangs at the eaves in the main roof area with visible rafter ends without horizontal cladding (cornice).
- Eaves area with battens between the rafters (where technically possible).
- Roof overhangs at the gable without flying rafters and without visible purlins.

At some houses I have already seen, and at our shed I simply let the battens extend 30 cm beyond the plastered masonry and mounted a 3-layer board underneath.

The verge tile of the Frankfurt pan roof covered this without any problem, and I did not install a vertical batten.

The boards look unsightly after a few years and need to be painted, so I would not expose them directly to the weather.

But whether that is proper practice I do not know, I have often done it this way, but that does not mean it is correct.

Can it be executed like this?

Unfortunately I have no better picture, I took this one somewhere on the way today....

Regards

The boards look unsightly after a few years and need to be painted, so I would not expose them directly to the weather

If you treat the boards properly, nothing will happen. I have about 80 cm of roof overhang with an additional outer visible rafter. Covered in 2009 and until now, except for some darkening, everything still looks like on the first day.

I primed the wood and painted it with Bondex wood paint Pine. An open-pored glaze. However, painted 5 times with a spray gun. No problems even on the weather side.

30 cm of roof overhang is no problem, even without an additional rafter.

I would definitely not use a closed glaze or any gel paints. I don't want to repaint my eaves boxes every 10 years. The problem is always white paint, etc. Looks great, certainly, but does not last long. Then you have to sand it off and repaint. It's the same as with wooden windows.

Then it means sanding down and repainting. It's the same as with wooden windows.

Weathered wood should not be painted, but oiled. It can be recoated without sanding and the wood also has the chance to release water again. Additionally, it does not peel off.

Is it possible to realize the 30cm roof overhang without rafters using only the battens and then screw a covering of about 20-25mm (board, 3-layer panel) onto the battens below, and leave it at that.

The Frankfurter tile covers 80mm on the side, so that should work without a side board.

Or does the board have a function in wind or snow deflection?

How much roof overhang at the gable is possible with only the battens?

The rafter is inside at the gable wall and from there the battens are "alone" or rest on the masonry.

Regards, Ralf

30 cm roof overhang is definitely possible. I wouldn't do more than that, because otherwise the roof battens will start to bend. There might also be snow load on top.

Without a verge board, it probably won't work for you. I wouldn't do that either.

On the rafters comes the underlay membrane, then the counter battens, and then the roof battens.

Counter battens and roof battens are surely 4 x 6 cm, so you already have the 8 cm. For a 30 cm roof overhang, I would definitely use these roof battens. The counter battens are missing in your picture. It all gets very tight when you think about driving rain, etc.

I would install a verge board and clad it with slate tiles. Looks great and lasts forever. Keeps moisture away from the roof.