50 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 50 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
First used in 1903, they were in general use in parts of the US by 1911; by 1939 America was making 11 million squares a year.
Q 02In what year were asphalt shingles first used on a roof?
1903
A National Board of Fire Underwriters campaign against wood shingles helped push them into the mainstream.
Q 03In 1897, what was first added to the surface of asphalt roofing to make it more durable?
Slate granules
Later granule experiments included mica, oyster shells, dolomite and fly ash; the underside gets talc or sand so shingles don't stick together in the bundle.
Q 04By 1882, what share of Britain's slate came from Wales?
92%
The Penrhyn and Dinorwic quarries alone produced half of it, and the men worked in partnerships called 'bargains'.
Q 05Large-scale Welsh slate mining began in 1782 with the opening of which quarry near Bethesda?
Penrhyn
It started as the Cae Braich y Cafn quarry in the Ogwen Valley 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
The same property makes it ideal for floor tiles and billiard tables; North Wales slate comes in many shades of grey and even purple and green.
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
Large reed beds have been rare in most of England since Anglo-Saxon times, which is why so much is imported from Turkey, Eastern Europe, China and South Africa.
Q 09The mansard roof is named after which 17th-century French architect who popularised it?
François Mansart
The tale that mansards dodged a French window tax is a myth: the tax was enacted in 1798, 132 years after Mansart died.
Q 10A gambrel roof, the classic American barn shape, has how many slopes on each side?
Two
The Dutch call it a 'two-sided mansard roof', while in Europe the word mansard often means a gambrel.
Q 11Which shape is recommended in hurricane regions because it has no flat gable ends to catch the wind?
Hip
For hurricane country it also needs to be steep, at least 35 degrees, because wind over a shallow hip roof creates lift like an aeroplane wing.
Q 12The word 'dormer' comes from a Middle French word meaning what?
Sleeping room
Dormer windows lit attic bedrooms; on church spires the slender version is called a lucarne.
Q 13In US roofing, a roof that rises 6 inches for every 12 inches of horizontal run has what slope?
6:12
The tables on a framing square show slope, not pitch, which is a common source of confusion on site.
Q 21The first sports venue with a retractable roof was in which US city?
Pittsburgh
The now-demolished Civic Arena opened in 1961 for the Pittsburgh Civic Light Opera and later hosted the Penguins.
Q 22How many tiles cover the shells of the Sydney Opera House?
About 1,056,000
They come in glossy white and matte cream in a chevron pattern, made by Höganäs, a Swedish firm that mostly made tiles for paper mills.
Q 23The Sydney Opera House's roof tiles were manufactured in which country?
Sweden
Architect Jørn Utzon was Danish; the building opened in 1973, 16 years after he won the design competition.
Q 14What pitch does a flat roof have?
Zero
Every other roof is 'pitched'; even a flat adobe roof usually carries a very slight slope for run-off.
Q 15The strip of flashing below a chimney is still traditionally called what?
An apron
Builders' books were giving instructions on lead flashing by 1832, and the 1875 Notes on Building Construction shows methods still used today.
Q 16According to the Oxford English Dictionary, the word 'eaves' comes from an Old English word meaning what?
Edge
The Old English efes was singular, which is why 'eaves' now serves as both singular and plural.
Q 17Which people first brought rainwater gutter systems to Britain?
The Romans
The technology was lost after they left and reintroduced by the Normans; the White Tower at the Tower of London had gutters.
Q 18Who patented 'indented or corrugated metallic sheets' in 1829, giving the world corrugated iron roofing?
Henry Palmer
Palmer was engineer to the London Dock Company; after his patent expired in 1843 corrugated galvanised iron became a worldwide favourite.
Q 19Overlapping tiles called imbrex and tegula covered the roofs of which ancient civilisations?
Greece and Rome
The flat tegula sat under the curved imbrex; the system is still recognisable 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
Clay tiles are thought to have been invented independently in Greece and China in the late Neolithic.
Q 24Almost 2,000 years after it was built, the Pantheon in Rome still holds what record?
Largest unreinforced concrete dome
The height to the oculus and the interior diameter are identical, 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 timbers were sheathed in lead; 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
He wasn't the original inventor; a planetarium dome, 'The Wonder of Jena', had opened in Germany in 1926.
Q 27Over decades, a copper roof weathers to which distinctive colour?
Green
The verdigris patina is so prized that architects like Renzo Piano have specified pre-patinated copper to get it on 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
It sits in a museum 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
The bronze figure held a rod that turned with the wind; the tower is one of the earliest known weather vanes.