Retractable awnings are great way to enjoy your deck or patio when the sun is beating down and no other structures or trees provide shade.
Retractable awnings are usually mounted to the wall or the roof overhang (aka. soffit).
Another - not so well know option - is to mount the awning on your roof. This necessary when there isn't enough clearance above your door or window.
A roof mount is very simple and straight forward. You will need special roof mount brackets. This should be an option when ordering you awning. Other than that it is very similar to a standard wall mount.
Make sure when you attach your roof brackets that lag bolt get a solid embedment into roof rafters, Just like you would normally find you wall studs.
Before mounting brackets to the roof use caulk around the holes, this is also know as back caulking. Don't use regular bathroom caulk. Use exterior caulk that can withstand the temperature changes.
Another consideration is: When you mount an awning onto your roof, get one with extra deep projection. You will "loose" some projection since it will be up on the roof and thereby recessed relative to you deck.
One more thought. In general a roof mounted awning will have to be motorized, since most likely you will not be able to reach the awning with a manual crank, this will make the awning more costly and you have to plan for the electric.
For pictures and more information go www.awnings.us
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