Flashing shall conform to the requirements of applicable building code and good roofing practice.
Mansard roof shingle installation.
According to asphalt shingle installation where we cite best practices guide to residential construction wiley november 18 2005 asphalt shingles should not be installed on vertical walls.
The purpose of this guide is to.
Secure the shingle to the roof deck with fasteners as recommended by the roofing manufacturer.
These recommendations may call for up to six fasteners per shingle.
Installation temperature requirements for asphalt shingle roofs ideally shingles should be installed at temperatures ranging from 40 f to 85 f.
Shingle application bundle staging alignment fastening hip and ridge caps vents etc.
Closed valley applications are acceptable but not.
Use six nails and four spots of asphalt roofing cement for every full shingle for every full shingle as shown below.
Figure 5 mansard roof hand sealing example figure 6.
In fact you will be able to install multiple gable roofs or hip roofs for the cost of a single mansard roof.
Continue to follow these instructions nailing each shingle in with about 4 to 6 nails each.
Flashing details use of roofing cements.
Once you get to the top you can go to the next side of the roof and work your way up to the top again.
Above 85 f it is easy to tear the shingles or mar the granular coating.
Secure the shingle to the roof deck with fasteners as specified in atlas shingle installation instructions.
Bear in mind that atlas requires six nails per shingle when fastening shingles to steep roofs when installing laminate or architectural shingles apply six quarter sized dollops of asphalt plastic cement under each shingle.
Corrosion resistant flashing must be used to help prevent leaks where a roof meets a wall another roof a chimney or other objects that penetrate a roof.
Moreover not many roofing experts will be familiar with this design.
Start with 6 rows going up and then across to use as a guide.
For the first shingle in each row you will want to cut off about 6 inches as you go.
In spots equivalent to the size of a quarter a quick setting asphalt adhesive cement must be applied under all shingle tabs immediately upon installation.
Install open metal valleys.
Asphalt roofing cement should meet astm d 4586 type ii.
Special nailing and sealing requirements must be met when installing asphalt based roof shingles on very steep slopes such as a frame or mansard roofs.
Metal valleys are recommended.
Hence the quality of the mansard roof might not be up to preferable standards.