One would consider adding a gable roof to an existing roof for the following reasons.
How to attach a gable roof to an existing roof.
In the case of a lean to roof over an addition the existing rafters will have to be cut away to accommodate the addition and the shed roof will require support where.
A gable roof would make the new room appear like it s a natural part of your home.
It s simple yet pleasing to the eyes.
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However if you build a porch roof with a peak larger than your existing roof check to make sure the that material can stand up to the pitch of your porch roof.
To do this method you will have the back channel and fascia strengthened by reinforcing two.
Fix the back channel to the fascia boards underneath the gutter directly.
This method may be one of the most ubiquitous ways of attaching a patio roof.
If attaching a patio roof to a ledger beneath the eaves does not allow for enough headroom you can set the new patio roof s rafters on the wall s top plate.
Here are 7 different ways of attaching a patio roof to an existing house that you can apply.
Several methods exist based on the current roof design.
In case you don t know what a gable roof is it s the kind of roof that s formed as two slopes meet at the top.
On a two story house you can usually tie the ledger into a band joist also called a rim joist located between the floors as shown below.
Pick roofing materials that match your existing roof.
There are several important things to know about matching existing roofs and how to do it depending on what style of roof you have the roof truss design and how you want to add on.
As long as you use a roofing design that matches your existing roof you can use the same materials.
Attaching below the ridge.