How To Install Flat Metal Roof

Codes vary so call your local building department to know how to install metal roofing over shingles properly code wise.

How to install flat metal roof.

So if your roof has two layers it may require a complete tear off even though steel is lighter than asphalt. Use your neoprene washer head screws to secure the metal to the sheathing. Place the first screw. And for any exposed fasteners try to avoid over tightening them.

Moreover try to ensure that the screws are all aligned evenly. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. Creating a flat roof can be completed as either a diy weekend project or by a professional contractor. Step 3 install the metal edging.

For first time homeowners it s typical to hire a professional contractor who can complete the flat roof installation for you and offer a full warranty for their work. Step 5 install the metal trim. Step 4 laying the sheets. Try to space the screws about 12 inches apart down the entire piece of metal.

Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. You will use metal roofing screws to secure the metal panels to the sheathing. Of course you don t need to live in a modern house to deal with a flat roof. Yet for historic modern style buildings like this old house s cambridge tv project flat roofs are at the core of the architecture meant to reflect the broad horizontal lines of the natural landscape.

They give added support to the roof and also provide a nailing surface for the end panels and drip edge. Place them directly onto purlins that are attached to the roof trusses beginning on the outside edge. Purlins are 2 by 4 feet and are installed much like metal roofing. Close or seal off the ends with a wood or plastic strip under the panel at each end.

For exposed fasteners avoid over tightening the fastener. How to install metal roofing. Step 1 measure the roof height. What s involved in how to install metal roofing.

Measure the height. Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are. Measure the height of your roof adding 2 to 4 inches to your measurement to allow overhang. Metal roof purlins are installed horizontally under metal roofs.

They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top. Space the screws about 12 in 30 cm apart. These will stop the entry of rain wind and pests.