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2. Flashing (weatherproofing) - Wikipedia

   en.wikipedia.org/wiki/Flashing_(weatherproofing)

   In earlier days, birch bark was occasionally used as a flashing material. [7] Most flashing materials today are metal, plastic, rubber, or impregnated paper. [8]Metal flashing materials include lead, aluminium, copper, [1] stainless steel, zinc alloy, other architectural metals or a metal with a coating such as galvanized steel, lead-coated copper, anodized aluminium, terne-coated copper ...

3. Metal roof - Wikipedia

   en.wikipedia.org/wiki/Metal_roof

   Metal roofs can last up to 100 years, with installers providing 50-year warranties. [citation needed] Because of their longevity, most metal roofs are less expensive than asphalt shingles in the long term. [10] Metal roofing can consist of a high percentage of recycled material and is 100% recyclable. [11]

4. Flat roof - Wikipedia

   en.wikipedia.org/wiki/Flat_roof

   A study by Ducker International in 2005 identified the average cost per year of a metal roof to be US$3.2 per square metre ($0.30/sq ft) while single-ply roofs stood at $6.1/m 2 ($0.57/sq ft) and built-up roofing at $4.0/m 2 ($0.37/sq ft).

5. Portal frame - Wikipedia

   en.wikipedia.org/wiki/Portal_frame

   roof load; wind load; Previously, it has been shown that the limit state design/load and resistance factor design (LRFD) and permissible stress design/allowable strength design (ASD) can produce significantly different designs of steel gable frames. [3] There are few situations where ASD produces significantly lighter weight steel gable frame ...

6. List of roof shapes - Wikipedia

   en.wikipedia.org/wiki/List_of_roof_shapes

   Half-hipped (clipped gable, jerkinhead [7]): A combination of a gable and a hip roof (pitched roof without changes to the walls) with the hipped part at the top and the gable section lower down. Dutch gable, gablet : A hybrid of hipped and gable with the gable (wall) at the top and hipped lower down; i.e. the opposite arrangement to the half ...

7. US homebuilder confidence at 7-month high in November, survey ...

   www.aol.com/news/us-homebuilder-confidence-7...

   With mortgage rates remaining high, nearly a third of builders had to cut prices to lure buyers in November, and 60% of firms were offering sales incentives, NAHB said. The average price cut was 5 ...