Roofing Trivia
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49 free Roofing trivia questions with answers — trivia quiz, new questions added Aug 2026.
Roofing trivia is more fun than it sounds. This quiz covers the materials (asphalt shingles, Welsh slate, thatch, clay tile, corrugated iron, copper), the shapes (mansard, gambrel, hip, gable, saltbox, butterfly), the vocabulary roofers use every day (pitch, eaves, flashing, dormer, ice dam) and the world's most famous roofs, from the Pantheon's concrete dome and the Sydney Opera House's million tiles to the first retractable stadium roof and the night Notre-Dame's medieval timbers burned. It works for a roofing company's social feed or team meeting, a construction class, or a pub quiz round that wants something nobody has revised for. Questions run from easy (what does a weather vane do?) to genuinely hard (which quarry made 92 percent of Britain's slate?). Every answer is checked against the Wikipedia article on the material, style or building, and each question links to its source, so the facts hold up if a roofer in the room disagrees.
30 of 49 questions with answers and explanations. Play the quiz
Q 01Henry Reynolds of which city invented asphalt shingles, North America's most common roofing?
Grand Rapids, Michigan
Henry Reynolds of Grand Rapids, Michigan cut the first asphalt shingles from asphalt roll roofing; they were in general use in parts of the US by 1911, and by 1939 America made 11 million squares a year.
Q 02In what year were asphalt shingles first used on a roof?
1903
Asphalt shingles were first used in 1903; a National Board of Fire Underwriters campaign against wood shingles helped push them into the mainstream over the following decades.
Q 03In 1897, what was first added to the surface of asphalt roofing to make it more durable?
Slate granules
Slate granules, crushed and pressed into the asphalt, were the first mineral surfacing; later experiments included mica, oyster shells, dolomite and fly ash, while the underside gets talc or sand so bundled shingles don't stick.
Q 04By 1882, what share of Britain's slate came from Wales?
92%
Wales produced 92% of Britain's slate by 1882; the two largest quarries alone supplied half of it, and the quarrymen worked in partnerships called 'bargains'.
Q 05Large-scale Welsh slate mining began in 1782 with the opening of which quarry near Bethesda?
Penrhyn
Penrhyn began as the Cae Braich y Cafn quarry in the Ogwen Valley, developed from 1782 under Richard Pennant, and grew into one of the largest slate quarries in the world.
Q 06Slate splits into smooth flat sheets for roofing because of a property called what?
Fissility
Fissility, the tendency to split along fine parallel planes, lets slate be riven into thin sheets; the same property suits it to floor tiles and billiard-table beds.
Q 07A 2013 report estimated how many properties in the UK still had a thatched roof?
60,000
Most are long straw, combed wheat reed or water reed, and more than 80 percent of the water reed used is now imported.
Q 08How much well-managed reed bed does it take to produce enough water reed to thatch an average house?
4–5 acres
Around 4–5 acres of well-managed reed bed yields enough water reed for one average house; large reed beds have been rare in England for centuries, so most reed is imported from Turkey, Eastern Europe, China and South Africa.
Q 09Which French ruler's rebuilding of Paris made the mansard roof fashionable in the 19th century?
Napoleon III
Napoleon III's Second Empire rebuilding of Paris under Haussmann put mansard roofs on boulevards across the city, and the look was copied worldwide as Second Empire architecture.
Q 10A gambrel roof, the classic American barn shape, has how many slopes on each side?
Two
Two slopes per side define a gambrel, the upper one shallow and the lower one steep; Europeans often call the same shape a mansard, a term Americans reserve for the four-sided version.
Q 11Which shape is recommended in hurricane regions because it has no flat gable ends to catch the wind?
Hip
Hip roofs slope on all four sides, so there is no flat gable end for wind to push on; in hurricane country they should also be steep, since wind over a shallow hip creates lift like an aeroplane wing.
Q 12What is the usual term for a slender dormer-like window set into a Gothic church spire?
Lucarne
Lucarne, French for a dormer window, is the usual term for the slender gabled openings set into a Gothic church spire.
Q 13In US roofing, slope is expressed as inches of rise over what horizontal run?
12 inches
12 inches is the standard run: a roof rising 6 inches over that foot is called a 6:12, a convention that leaves pitch, rise over span, as a separate measure.
Q 21The first sports venue with a retractable roof was in which US city?
Pittsburgh
Pittsburgh's Civic Arena, opened in 1961 for the Civic Light Opera and later home to the Penguins, had a retractable domed roof; it was demolished in 2012.
Q 22How many tiles cover the shells of the Sydney Opera House?
About 1,056,000
About 1,056,000 tiles (1,056,006 by the usual count) cover the shells, in glossy white and matte cream laid in a chevron pattern on the precast lids.
Q 23The Sydney Opera House's roof tiles were manufactured in which country?
Sweden
Sweden supplied them: the firm Höganäs made the tiles, though the architect Jørn Utzon was Danish; the building opened in 1973, 16 years after his competition win.
Q 14What pitch does a flat roof have?
Zero
Zero pitch defines a flat roof in name, though in practice even a flat roof is laid with a slight fall, typically a quarter inch per foot, so rainwater runs off.
Q 15The strip of flashing along the downslope face of a chimney is traditionally called what?
An apron
An apron is the flashing piece across the chimney's downslope face; step and counter flashing dress the sides, and a back gutter takes the uphill run-off.
Q 16According to the Oxford English Dictionary, the word 'eaves' comes from an Old English word meaning what?
Edge
Edge is the meaning of the Old English efes, a singular noun; that history is why 'eaves' serves as both singular and plural in modern English.
Q 17Which people first brought rainwater gutter systems to Britain?
The Romans
The Romans introduced gutters, and the technology was lost after they left until the Normans reintroduced it; the White Tower at the Tower of London was fitted with gutters.
Q 18Who patented 'indented or corrugated metallic sheets' in 1829, giving the world corrugated iron roofing?
Henry Palmer
Henry Palmer, architect and engineer to the London Dock Company, took out the 1829 patent; once it expired, corrugated galvanised iron spread worldwide as a cheap, light roofing.
Q 19Overlapping tiles called imbrex and tegula covered the roofs of which ancient civilisations?
Greece and Rome
Greece and Rome roofed with the flat tegula laid first and the curved imbrex capping the joints; the pattern survives in Mediterranean terracotta roofs.
Q 20In which country is Lerna's 'House of the Tiles', where thousands of Bronze Age terracotta roof tiles were found?
Greece
Greece is the site: the House of the Tiles at Lerna in the Argolid, an Early Bronze Age building of around 2500 BC, collapsed under a roof of fired terracotta tiles.
Q 24Almost 2,000 years after it was built, the Pantheon in Rome still holds what record?
Largest unreinforced concrete dome
The Pantheon, completed around AD 126, has the "Largest unreinforced concrete dome" ever built; the interior diameter and the height to the oculus are both about 43 metres, so a perfect sphere would fit inside.
Q 25The Notre-Dame de Paris roof that burned in April 2019 was largely oak from which century?
The 1200s
The 1200s supplied most of the "forest" of oak beams, felled early in that century; the timbers were sheathed in lead, and the stone vaults below largely contained the collapsing roof.
Q 26Who coined the term 'geodesic' for the dome design he popularised and patented in 1954?
Buckminster Fuller
Buckminster Fuller coined 'geodesic' and patented the dome in 1954, though Walther Bauersfeld's planetarium dome, 'The Wonder of Jena', had opened in Germany in 1926.
Q 27Over decades, a copper roof weathers to which distinctive colour?
Green
Green is the colour of verdigris, the patina copper develops after years of weathering; the look is so prized that pre-patinated copper sheet is sold to get it from day one.
Q 28According to historian Wolfgang Born, the onion dome originated where?
Syria
Umayyad-era mosaics show early bulbous domes; the shape is now most associated with Russian Orthodox churches.
Q 29The oldest surviving rooster-shaped weather vane, the Gallo di Ramperto, was made in which year?
820
The Gallo di Ramperto dates from 820 and sits in the Museo di Santa Giulia in Brescia; Pope Gregory I had called the cockerel 'the most suitable emblem of Christianity'.
Q 30The Tower of the Winds in ancient Athens carried a weather vane in the shape of which sea god?
Triton
Triton, the merman, topped the tower in bronze, holding a rod that swung to point into the wind; the Tower of the Winds is one of the earliest known weather vanes.