If the felt paper was bubbly or wet when it was applied then it will cause the roof to look wavy.
How to fix a wavy roof.
However that pronounced wave will nearly always signify one big thing.
However some areas allow multilayer roofs which can save homeowners the cost of a tear off and debris removal.
If you can get at the underside of the roof from the attic you can install 2x4 blocking to push the plywood up where it is dipping to help straighten it out.
This type of roof wave is usually only seen after a new installation.
However the new shingles will keep to the form of the old layer.
A layer of shingles was applied over an old layer this only happens if you worked with a bad roofing company.
Your roof is buckling or bulging somewhere or the materials simply aren t lying flat.
Although we generally think of our roofs as one of the major components of our home that keeps us dry we also need to think of them as a key structural component.
If your roof is sagging wavy or bowing there are six important things in the attic to check from a structural standpoint.
Thankfully this is usually corrected with a little time and heat.
Multilayer roofs it is always better to tear off your old roof and install a new one.
First one end then the other of the stretching tool is bolted to the pre drilled holes in a pair of opposing rafters.
When it comes to wavy or warped roofs it s best to call in a professional roofing contractor like aabco roofing for a thorough roofing consultation and inspection.
A good contractor will never just add a layer of shingles over an existing layer of shingles they ll remove your old shingles first.
A few reasons why your roof is wavy wavy or warped roofs don t happen naturally.
Thankfully this is the most common cause and also the easiest to fix.
Hardware details of the roof expander.
This is the best case scenario for a wavy roof because typically the paper will end up flattening itself after a few weeks of summer weather.
As work progresses hanging the roof sag remover tool from one of the new collar ties already in place eases holding it in place for bolting.
Typically in this case the problem will resolve itself with just a little time and heat.
If the material was damp if the day was humid or the paper bubbled a bit if could produce a wavy appearance on your new roof.