The contractor may do a walk on the roof and also inspect from the attic for any rot before installing a second layer of shingles.
How many layer of roof shingles.
So how many layers of roof shingles are allowed.
Most building codes allow up to two layers of organic or fiberglass asphalt shingles.
Now you just have to decide whether to remove the existing roof shingles or recover the roof.
Asphalt shingles typically can have one more layer added over the top two roofs total.
Most cities and towns allow a maximum of two layers of shingles says chad muth president of muth company roofing in westerville ohio.
Many roofers recommend using laminated or dimensional shingles for re roofs because they re thicker than.
You can either use special shingles called ridge shingles or cut a number of regular shingles into 3 tabbed equal pieces and bend each so they fit snugly on the roof peak and nail them into place.
Depending on climate and weather some areas may only allow one layer.
Roofing layers from the framing to the shingles.
Steep sloped roof products such as tile slate metal and shakes only allow one layer.
Bring the ridge edges together with a ridge capping layer.
If the structure can support the added weight a typical 20 square 2 000 square foot reroof will cost at least 1 000 less than a tear off job.
Asphalt shingles come in two major types 3 tab and architectural.
Checking building codes in your area is an important first step.
Framing includes the roof trusses that sit at the top of your house and support the weight of all the materials used to build your roof.
When it s time to replace your roof there are several factors that might lead your roofing professional to.
Re roofers have tricks to lay new roof shingles over old so that the same step ups between courses are maintained but if any old shingles are cupped curled or otherwise misshapen those defects will telegraph through to the new layer.
On most flat roofs such as epdm tpo or modified it is perfectly acceptable to two layers of roofing.
Most building codes allow two layers of organic or fiberglass asphalt shingles on roofs with a 4 12 pitch or less and three layers on steeper roofs.
That limit pertains to roofs with up to a 4 12 pitch.
For many years it was acceptable to put even the third layer.
You ll need longer nails for this part as you re driving through more layers of shingles.
How many layers is too many there are a variety of factors that determine how many layers of shingles a homeowner can have on a roof including.
Benefits of adding multiple shingle layers.
Most areas only allow for a maximum of two layers.
3 tabs are less expensive but also less durable have lower wind resistance and have a flatter appearance.
How many layers of shingles are allowed on a roof.
So we ll start at the bottom of the deck and work our way up through all the roofing layers until we reach the shingles and sunshine above your roof.
This will also be constrained by other factors.
