use 2×4 and space them 2′ apart. Nail them into EACH rafter with 6-7 inch pole barn nail and screw the metal to the 2×4’s. Will not come off. Subject: RE: Putting tin on a roof.

Metal roofs reflect heat, keeping the building cooler. (Shingles draw heat.) Durable. Metal roofs are tough.

For these panels, the generally approved slope is at least 2 inches per 12 inches. More slope is obviously better, though. For aluminum shingles, the slope reaches 3 inches for every 12 inches. There are more seams and fasteners with shingles, so it makes sense to have a steeper pitch than with the panels.

The traditional and most common material used for roof underlayment on a steep-slope metal roof is non-perforated, asphalt-impregnated felt underlayment. There are several types of felt underlayment including both organic reinforced and inorganic reinforced.

While most metal roofing styles can be installed as an advanced DIY project, metal roofing installation is complicated and can vary slightly based on the brand of panels or shingles that you select. We recommend that you install a metal roof with one or two helpers and fall protection equipment designed for roof work.

When it comes to metal roofs, sarking is considered to be important as it prevents condensation that can cause rusting. In bushfire prone areas, metal roof sarking is mandatory as it can protect your home against airborne embers entering your ceiling space during a bushfire.

Traditional roofing materials such as traditional clay tiles and timber shakes/shingles need a relatively steep pitch in excess of 40 degrees to be waterproof. More modern tiling and felt shingle systems can achieve lower slopes down to about 20 degrees.

Metal roofing should not be installed directly over the top of bare plywood. You do not have to install roofing shingles or other roofing material, but a felt sheet over the plywood is the bare minimum. Even without heavy rain, humidity can build up between the metal roofing and the plywood and ruin the wood.

Both 16 inches and 24 inches are common measurements for rafter spacing.

How to Install a Steel Roof Measure the roof. Order your steel roofing panels. Cover the shingles. Lay the batten boards. Install the eave flashing. Apply closure strips. Install the first steel roof panel. Install the remaining panels. Install the gable trim. Install the ridge cap.

When replacing a metal roof there are many expenditures in addition to the cost of the metal. The cost of the metal will depend on the type of metal used and how large the barn is. Most sorts of metal roofing cost anywhere from $1.80 to $6 per square foot.

The average bundle price of architectural shingles is around $16 to $30. With a bundle, there are three to a “square.” A square can cover 100 square feet. So for every 100 square feet, architectural shingles could cost $48 to $90 for the materials alone.