The warning signs that your roof is worn out that was posted by angie s list is pretty much spot on.
Roof apared to.
Pvc and tpo roofs are also viable options to explore.
Roofing manufacturers have tackled the problem of roof algae by creating shingles containing copper which is deadly to algae.
However they do have a slight pitch to allow for water run off and drainage.
This is one of the rare pitches where the numerator is greater than.
Replacing the shingles on your roof just because you have black stains is not necessary however and you should be suspicious of any roofer that suggests roof shingle replacement as the only solution to your algae problem.
Tar and gravel metal sheets pvc roll roofing rubber membrane and tpo are the most common materials.
More commonly referred to as shed or lean to roofs skillion roofs feature just one slope.
If the framing is sound and problems are not found elsewhere but the roof still sags the problem might have originated because of poor installation of the plywood sheathing or shingles.
Are prone to leaking.
Asphalt shingles and other traditional roofing materials are not viable options for low slope roofs.
As the name suggests flat roofs appear to be completely flat with no pitch.
A gable roof is placed at the top of a hip roof for more space and enhanced aesthetic appeal.
A qualified and honest roofing or general contractor should be able to tell you if your roof is worn out or if you can get another 5 to 10 years out of it.
This pitch might be as low as 1 12.
Visually this roof appears flat.
Epdm and neoprene roof seams are fastened by adhesive and pvc roof seams are heat or solvent welded.
One end of the roof rests on a taller wall than the other.
Low slope roofs are instead covered either by epdm rubber single ply membranes and multi ply membranes or a tar asphalt coating that provides water protection.
Stains damp musty odors and dampness are signs of a leaking roof.
Older roofs and roofs with damaged tiles shingles etc.
Roofs on victorian era houses were often sharply angled with a steep pitch.
Membrane roofs are attached in a variety of ways.
They can be partially loose laid and held down with river rock ballast requires roof structure to support the weight or fully adhered to the roof deck.
A dutch gable is a hybrid of a gable and hip roof.
Naturally if you see buckets or pots setting about you know there s probably moisture.
I will add that shingles are a combination of fiberglass and asphalt.
Here s how to notice and deal with potential issues before they become big ones.