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-   -   Under-deck patio lighting (http://www.diychatroom.com/f18/under-deck-patio-lighting-109194/)

spiragui 06-29-2011 03:26 PM

Under-deck patio lighting
 
1 Attachment(s)
Hi All,

I currently have a raised deck above a stamped concrete patio. In the near future I am going to waterproof the underside of the deck using EPDM as shown in the attached diagram .

I would like to add some lights (low-profile would be best) to the ceiling once it is dried in, but because of the membrane there is very little room for wiring, cans etc. Does anyone have any suggestions as the best way to approach this? This is already an exterior light wired to an interior switch by the door that leads out to the patio if that is going to help.

Regards
Chris

rjniles 06-29-2011 03:54 PM

I would do something with low voltage and surface mounted fixtures. The low voltage wire could be run above the ceiling and below the membrane and no electrical boxes would be needed.

user1007 06-29-2011 05:50 PM

Take a look at some marine catalogs. They will have some nice lighting alternatives for boat decking, docks and so forth that should be adaptable.

spiragui 07-06-2011 08:37 AM

A belated thanks for the replies. I think I will probably look at regular outdoor lighting, purely due to the costs involved with the LV.

Cheers
Chris

bob22 07-06-2011 12:25 PM

I'm curious as to how you drain the water that goes through the top deck boards and will eventually rest on top of the EDPM membrane?

spiragui 07-06-2011 03:29 PM

Hi Bob,

At the ledger board the EPDM membrane will be flat, the droop shown in the image will gradually increase as you get further from the house. Each panel between the joists is kinda fan-shaped to create this gradual droopiness.

This should give me a gradient of about 1/8" per foot of distance from the ledger board, but this could be increased by increasing the height of the compression strips (trading-off headroom, but I'm no basketball player so it wouldn't be distastrous), if anyone thinks that this is insufficient gradient.

Cheers
Chris

bob22 07-06-2011 04:28 PM

I assume the floor joists run perpendicular to the house?

spiragui 07-06-2011 04:38 PM

That they do.

Cheers
Chris

rjniles 07-06-2011 04:49 PM

Quote:

Originally Posted by spiragui (Post 680703)
A belated thanks for the replies. I think I will probably look at regular outdoor lighting, purely due to the costs involved with the LV.

Cheers
Chris

Actually LV lighting is pretty cheap.


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