Metal Roofing Services in San Antonio, TX
Standard Processes We Use when Installing a Metal Roof
Before the installation of any type of metal roof system an inspection should be done to make sure all the sheathing and framing components are in good condition and fastened properly.
Upon a completed inspection of any repairs that are made, the entire metal roof should be covered by high quality underlayments. Synthetic underlayment is recommenced and should be installed over the main roof decking.
Installation should be done according to the manufactures’ recommendation and also in compliance with all building codes.
In weather that can have freezing climates with freezing temperatures a high temperature non granule ice and water shield is also recommended. It will need to be considered for installation along the eaves and rake edges in the valleys.
Once again, installers should be knowledgeable of all State and Local building codes when installing new Metal Roof Products. With regards to fire ratings, a Class-A Fire Rating can be achieved by covering the entire roof area with a an approved material.
It must be applied over the sheathing or the existing roof and beneath the new underlayment. If metal panels are installed directly over a synthetic underlayment without a fire resistant material then a Class-C fire rating is achieved.
Upon completion of all underlayments being installed, the starter flashing can then be applied along the eaves and up the rakes to the gable ends. Along the eaves, the starter should be bent in the field to match the angles of the roof pitch and then securely fastened along the eaves. A couple of nails can then be used to hold the started in place and then it should be fastened down using galvanized screws evenly spaced and long enough to penetrate the roof decking by at least a half an inch.
Eaves starter should be overlapped by at least 2 inches when multiple pieces are used, and creating paths for the fasteners will help guide the screws through the metal roof.
When eaves starter reaches the corner it should be field cut so the adjoining pieces can wrap around the corner and overlap each other.
Upon completing the installation of the starter along the eave, the ice and water shield should be applied over the starter to create a permanent water tight seal.
Starter flashing is also installed along the roof rake going up to the gable peak. Starting at the bottom. The first piece should be field cut to overlap the eaves’ starter and then properly fastened moving up the gable.
Along the rake the starter flashing should be installed over the underlayment and when reaching the peak, the adjoining pieces should be once again field cut to overlap, and then securely fastened.