When the roof framing is assembled two ceiling rafters are often joined together to create a longer span.
Roof rafters bulginf.
After a bunch of deficiencies were noted the larger roofing company fixed most of them.
Sagging roof lines can originate with the horizontal ceiling rafters.
To prevent rafters from spreading bracing struts can be used to tie the rafters to the ceiling joists or a metal tie bar spanning through the building at ceiling joist level with metal plates on both sides of the wall.
If your roof is uneven it s possible that an architect engineer or builder didn t properly design the roof s framing structure.
This article excerpts from provides copies of roof framing suggestions from canadian building codes and the cmhc wood frame house construction guide.
Rotted wood rafters in a roof are a serious issue.
They still haven t been paid yet aside from the initial deposit.
There is visible warping three years following the installation as seen in the attached images.
When looking from the top it looks like this.
Rafters or joists are the primary supportive members of roof structures.
Architects engineers and designers carefully calculate framing member size spacing and layout according to project specific factors.
Framing any roof but particularly a gable roof low slope roof and cathedral ceilign roofs requires collar ties rafter ties and possibly a structural ridge beam to support the roof and to.
Roof framing suggestions canadian guidelines.
Something else to look for in regards to roof spread is sag.
A roof over or re roof is not recommended because it will certainly lead to buckling.
Buckling can occur if the wrong type of nails were used to connect the sheathing to the rafters.
So i have noticed a bulge on the roof.
Wood rotting from the inside out compromises the structural integrity of the rafter.
If the ceiling joists are not properly secured they will need to be tied in to prevent further movement.
The shingles are tamko 20 year 3 tab.
The roofer has recently inspected in the attic and sees no issues with framing or decking.
This article describes explains the directions of forces in roof structures illustrating downwards force horizontal thrust and the causes of rafter sags rafters that disconnect from the ridge or top plate and why a sagging roof pushes the building walls outwards at the wall top.
My roof is the brown one at the bottom.
The nails slip out of the sheathing and create small visible bumps on the surface of your roof.
This roof was installed in april 2013 in northern texas.
Therefore the first signs of roof spread are often cracking bulging or leaning at the head of the masonry causing bowed walls.
Roof sag or roof collapse forces.
We include photographs of collapsing wood framed roofs and photo sequences.
Commonly what you can see of the rotted wood is only part of the problem it is what you cannot see under the surface of the wood that can be the main issue.
