Epdm on garden room

[Jupiter01]

With my 6.5m x 3m garden room, that has a flat and sloped roof, do I really need to bother with the edge kerbs etc.? I thought it may be cheaper, easier and may be even stronger to tuck the excess rubber under the fascia and then mechanically fix the fascia over it.

Haven’t quite figured out what I do with the back end where the gutter is required but interested to hear your views on this.

 

[^woody^]

Why don't you just buy the proper plastic edges and drip for the gutter and do it properly?

Otherwise your messing about, and trying to ensure that it's all detailed correctly to avoid moisture creeping into the eaves and ensuring it goes into the gutter.

 

[Jupiter01]

Why don't you just buy the proper plastic edges and drip for the gutter and do it properly?

Otherwise your messing about, and trying to ensure that it's all detailed correctly to avoid moisture creeping into the eaves and ensuring it goes into the gutter.

Was trying to save some money but perhaps it’s not worth it.

 

[Jupiter01]

Does the top part of the fascia need to finish flush with the roof OSB? I know it can’t be higher but how much lower can be from the osb finish?

I am using 5inch roof joists.

 

[^woody^]

Flush, or slightly lower. The edge needs to be rounded off or chamfered too if the membrane is being draper over the edge before fixing

 

[^woody^]

 

[Jupiter01]

View attachment 425520

How much lower can the top of the fascia be?
I think I will go with the 125mm boards. I have 5inch joists and 15mm osb. I also assume that some of this 125mm fascia will go under the soffit.

Can you please advise. Thanks again.

 

[^woody^]

The top of the fascia can go anywhere, as long as its covered and there is still support for whatever is going to cover the junction

 

[Jupiter01]

The top of the fascia can go anywhere, as long as its covered and there is still support for whatever is going to cover the junction

Sorry. I don't follow. If the fascia was 5cm lower from the top of the OSB, how would I be able to fit the kerb trims? I am trying to understand whether it is necessary for the fascia to finish flush with the osb or how much lower it can be for the kerb trims to still work. Hope that makes sense.

 

[^woody^]

If you look at that sketch above, the fascia could potentially move down to somewhere above or below the nail.

It could even move down to just above the bottom of the kerb cover edge, but then you would need something above the same thickness as the fascia to support the kerb cover

 

[Jupiter01]

If you look at that sketch above, the fascia could potentially move down to somewhere above or below the nail.

It could even move down to just above the bottom of the kerb cover edge, but then you would need something above the same thickness as the fascia to support the kerb cover

If the fascia finished just below that nail image, I can't understand how the kerb trim will sit flush. Would it not be at an angle as it has no support above the nail?

 

[^woody^]

You put a packer piece in, or several just where then nails will be

 

[Jupiter01]

So putting all of this together, my ring beam is 127mm and i have an option to go for 125mm capping board or 150mm. The latter will definitely need trimming at the top. Note that there is a soffit that they need to hold up too, so some height will be lost there. What do you suggest?