The chimney structure comes through the roof leaving a large gap between the.
Using chimney to support roof deck.
I have a client who wants a deck built approximately 10 off the ground with a roof.
A great deal depends on the pitch of the roof.
Counterflashing and base pieces overlap but aren t physically joined so they can move independently yet still repel water.
If you like the idea of having the roof above your house s roof you need to make sure the support posts are within 4 feet or so of the original gutter on that side.
Typically a hanging support bracket secures the chimney at the point where it passes through the roof deck or through building floors as well.
Once again a 2 by 4 inch piece of lumber is placed between the trusses and parallel to the ceiling joists.
You may be able to buy a pre made cap at a heating supply retailer if you have a standard size clay liner that protrudes above the top of the chimney.
Place pier blocks so that the posts will be against the inside of the support frame.
For deck roof posts dig holes for the roof posts and pour cement to keep them secure.
Flashing is typically made from lead but can also be aluminum steel or copper.
Most deck roofs require separate footings from the deck to support the weight of the roof throughout the seasons.
Porch decks also require larger footings than deck footings.
The other is just used to support the trusses.
The upper pieces of counterflashing are usually tucked into chimney mortar joints and made to overhang various pieces of base flashing which are nailed to the roof deck.
A higher pitched roof would be better for extra living space than a lower pitched roof.
If the deck doubles as a porch it needs to be able to support no more than 80 psf.
If not one can be fashioned from sheet metal using standard tools such as tin snips and pliers.
This is where a high pitched roof is necessary.
2 fix these support posts to your decks original support frame bolts work well.
Chimney material and the roof deck.
In roof supported metal chimney installations in mobile home chimney installations and in cathedral ceiling installations of metal chimneys a ceiling support box or special roof support is required.
20 6x6 pt posts would be long enough to use as both deck support and roof support but the expense isn t justified because all that is needed to support the roof would be 4x4s.
Use along with storm collar to weather proof the chimney penetration through the roof deck designed with a large base for extended protection for use on roof with a pitch between 0 12 and 6 12.
