Need advice with the roof inspection

Specific Inspection Topics Roofing Inspections
1

Hi, please share your thought about the reason of this bumping line on the roof surface. There was no access to the attic. Thank you

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2

Hi Zhygir, Welcome.

That is a good question. I am interested in your theories first. What do you think?

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3

HI Brian, I assume there is an issue with the sheathing. There was 1 layer installed. The shingles don’t look old. Might be just a deformation of the underlayment?

4

Did you walk the roof (appears to be a drone photo)? Were you able to apply any pressure to the ridge or bump?

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5

I haven’t seen any signs of leak on the second floor.

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6

I dint walk on the roof, so I don’t know if it is rigid or soft

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7

Welcome Zhygir,
I assume since you were using a drone, you didnt actually feel the bump?
ha, I see Brian beat me to it.
It appears to me to prob be a high truss or rafter. Typically a wrinkled underlayment isnt in such a straight line.

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8

Then, In my opinion there is not enough information. It could be an issue with the sheathing or framing or buckled underlayment. As Daniel stated, the latter is less likely. However, at this point I believe you will be reduced to describing what you see and your limitations. I would elevate this for further evaluation considering you could not walk the roof or have attic access.

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9

Hey Daniel, thanks, but how come it creates a straight line? I would expect different level of roofing material, but it looks like a wire underneath the shingles.

10

All right, thanks, that’s what I have to do. Appreciate your help guys!

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11

What did it look like from the attic side?

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12

There was no access to the attic

13

I have seen trusses lift, causing this exact phenomenon. Also, was there an addition or alteration to the home that could have altered the original roof line?

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14

You could have also put a ladder up against the gutter and lifted up the shingle at the eaves right at the bottom of that hump to get a clue.

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16

I agree, but I don’t carry ladders of this hight :frowning:

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17

How old is the home? At this point we don’t even know if they are trusses or rafters.

18

There was an addition to the house, but I dont really think it could cause this bump

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19

It is trusses. they have a cathedral ceilings

20

The house is 50 y.o.