GRP and PV

[BartW]

Hi,

I am thinking of using GRP roof on flat and pitched part.

 

The plan is to then install PV panels on aluminium rails on both roofs.

 

The question:

 

Is there a robust detail that will allow penetration through the warm GRP roof?

 

I thought perhaps do the GRP, then add C24 blocks, GRP over the whole thing again, and install the frame onto that.

 

Would that work?

 

Thanks 
Bart

 

 

 

 

 

[SteamyTea]

15 minutes ago, BartW said:

Would that work?

Yes, and is probably the easiest and safest way to do it.

[Onoff]

On the flat roof why not ballast trays? That's my plan but I'm not sure how they'll sit on a Desmopol type "painted on membrane" roof which is what I'm thinking about. 

[SteamyTea]

Just now, Onoff said:

On the flat roof why not ballast trays?

We looked into use them on a project.  Decided against them in the end.

Your roof would need to be able to support the extra static load, as well as the dynamic wind load (that was out problem, too windy, too often, down here).

[BartW]

3 minutes ago, Onoff said:

On the flat roof why not ballast trays? That's my plan but I'm not sure how they'll sit on a Desmopol type "painted on membrane" roof which is what I'm thinking about. 

 

Ballast trays make me nervous about the panels taking off one day in the future...

 

It will be a flat roof @ 8m above ground, not sheltered by anything around. A 2m long panel that only weights 20kg (plus whatever ballast weights) could still get some decent aerodynamics in a 100mph well directioned wind ?

 

Here is our roof, and the potential it offers to solar PV.

 

 

We would also want to install wooden rain screen cladding around the PV panels, seeing there will be little left of them.

 

 

 

Edited January 24, 2021 by BartW