Fascia for rubber roof on shed

[Jupiter01]

I am preparing a roof on my shed and planning how the fascia will work with my rubber roof.
To keep costs down, I was going to use a white fascia, cut to size.

Here is my current progress:

The joists will be cut to size and I am aiming for around 5cm of overhang.
I think I need to fit some sort of timber across the face of these cut joists, bond my membrane to this and nail a fascia on to this.

Can I get your thoughts on this please.

Specifically, what type of timber do you recommend for the joist face and do I fit this first and then cut the OSB flush to this, or does it go on after the OSB?

Thanks in advance.

 

[cdbe]

With a rubber roof you'd use the correct trim. In my case it was two parts - fascia, first part, EPDM lapped off roof and second part to sandwich the EPDM. Sufficient length was left below the trim to run into the gutter. My trim came pre drilled with nail holes (use poly nails) but didn't match up with the rafter ends so I just drilled some more (I think I'd just tacked up the fascia so used long nails to secure the whole lot).

You might want a larger overhang to shelter the wall and you'll need a soffit. Use an "L" shaped fascia, depending on its depth you might want to fix more timber under the rafters to carry it securely.

 

[Jupiter01]

With a rubber roof you'd use the correct trim. In my case it was two parts - fascia, first part, EPDM lapped off roof and second part to sandwich the EPDM. Sufficient length was left below the trim to run into the gutter. My trim came pre drilled with nail holes (use poly nails) but didn't match up with the rafter ends so I just drilled some more (I think I'd just tacked up the fascia so used long nails to secure the whole lot).

You might want a larger overhang to shelter the wall and you'll need a soffit. Use an "L" shaped fascia, depending on its depth you might want to fix more timber under the rafters to carry it securely.

View attachment 353056

Thanks for doing this @cdbe. Some ore context on this. This width of this lean to shed is around 50cm. I am tight for space (and budget...). I wasn't planning to put a gutter on this but will have a slight overhang to help with water drip off and not run on to the front of the shed.
I had this in mind:

I think the timber on the face of the joists needs to go in first and the OSB is then cut flush to this. The bonding used on the perimeter could be used all the way down this timber to stick the excess rubber or just trapped behind a regular white fascia with nails.

Please let me know your thoughts on this.

 

[cdbe]

I probably wouldn't even bother with a fascia in that case. Bond to your "timber across studs", making sure it's deep enough to form a drip, fold up underneath and nail it above your soffit.

 

[Jupiter01]

making sure it's deep enough to form a drip

I don’t follow this part. Can you elaborate please.

Also, do I fit the “timber across the studs and then cut the osb flush to this?

 

[noseall]

I don’t follow this part. Can you elaborate please.

You need to add a drip batten before fitting the roof material, i.e......

drip.jpg

• noseall
• 26 Aug 2024

The drip batten needs to extend at least 40mm beyond the same surface that the gutter will be attached to. The batten can be a piece of 50mm wide roof batten edge fixed. It's better to fix this prior to fitting the décor fascia board, so as to allow you to replace the fascia independently in the future.

 

[Jupiter01]

I probably wouldn't even bother with a fascia in that case. Bond to your "timber across studs", making sure it's deep enough to form a drip, fold up underneath and nail it above your soffit.

I was planning on using a PVC board (95mm) on this face, with the rubber tucked behind it. I will be bonding the deck perimeter, should I also bond this 95mm OSB face and then pin the PVC on to the rubber?