How to replace Polycarbonate Roof?

[calccom21]

Hi, need some advise - i have existing laserlite 2000 trimdek profile roof (clear) and i wanted to replace it with laserlite 3000 greca profile (or different brand - greca profile). As the existing would have the screw hole in the metal structure beam, when i replacing it how do i aligned and screw it align to the hold in the metal beam. Any advise? since it is different profile - is it advisable to removed the clear and aligned to the top of the new color roof and do the marking (eventhough both different profile)?

[EricL]

Hello @calccom21 

It is an interesting solution if you don't want to take the old roof sheet apart. But I will leave the choice up to you on how you wish to proceed.

Eric

[calccom21]

How do I use packer? Sorry noob here and never heard about packet and where it goes to?

[calccom21]

I'm installing solar battery and the clear roof have 100% heat through which is not recommended so I need to put some sort battery friendly for so less heat pass through. I already requested a greca sheet. What is the best way to deal with lol

[calccom21]

I would thought it will be easier because trimdek has rib and greca has rib too and so just cut and overlap 1 rib to the other should be fine and the roof is slightly slope downwards

[AlanM52]

@calccom21

CC: @EricL, @Nailbag, @Dave-1 

I am suggesting we rewind back to the start and clarify a few things.

(Also asking for photos of the patio area and the intended location for the battery)

You are installing a solar battery on your patio and from what you have been researching the 'as new' clear poly should be replaced with tinted poly to provide better battery protection from the sun and if that's the case I have a question.

Are you adding a battery to existing solar panel system or is that battery part of another system.

Cheers

[EricL]

Hello @calccom21 

Thank you for sharing that extra bit of information. If you still wish to change your polycarbonate roofing, I still recommend making sure that they are the same shape and profile as your old polycarb sheet for easy replacement.

Eric

[calccom21]

 attached is the photo. Yes it install battery on existing solar panel.it slope from right to left. The panel I wanted to replace will far end near the wall.

[calccom21]

Thanks @EricL . So with the same profile it will stick well with the panel next to it. Do I need to put sealant or tape joining the panel or not required since it sits well and had screw on it closer look of the join as attached

 Also do you know where I can find these screw with rubber?

 

[Nailbag]

If you’re finding it difficult, you could possibly just fasten the new sheet on top of the old using longer sealed poly screws. The clear sheet still remains as the main waterproofing barrier

Nailbag

[Dave-1]

Good Morning @calccom21 

The crew have described what I had in mind (will get a chance later to sketch it out if you want) Tho @Nailbag's suggestion of installing a new sheet over the clear sheet would solve the issue nicely. 

Some things to note.

When screwing through any roofing sheet, you generally screw through the high points, this is so water dosnt drip through the screw holes in the valleys.

The roofing screws come in a range of sizes depending on what you decide to do - Roofing screws 

As the new sheet is unlikely to match up, you could lay three pieces of timber 35mm*70nn H3 timber across where the existing roof suupports for the alsonite are. Remove the existing screws, install the longer ones that @Nailbag has suggested. and then once those three are done you can screw you new "cover" sheet onto the three raised supports.

Dave