Roofer Interview Questions UK: 8 Real Questions and What Interviewers Want

Applying for a Roofer job in the UK? Here is what you are likely to be asked. These questions come from our Roofer question bank of 16 questions, written for UK employers at mid-level level.

Eight Roofer interview questions, and what the interviewer is thinking

1. How do you set out and fix roof battens and tiles in line with BS 5534?

Why they ask: Tests core knowledge of the standard that governs slating and tiling in the UK.

2. What is the difference between a breathable and a non-breathable roofing underlay, and how do you decide which to use?

Why they ask: Checks understanding of moisture control and ventilation in pitched roofs.

3. Which Work at Height Regulations 2005 controls do you apply when working on a pitched roof?

Why they ask: Roofing is a high-risk trade, and employers need to know you plan work at height properly.

4. How do you form a lead flashing around a chimney, and what Lead Sheet Association codes would you use?

Why they ask: Leadwork is a skilled trade element, and quality flashing prevents leaks at the most vulnerable junction.

5. What are the main types of flat roof system, and how do you decide which to recommend?

Why they ask: Employers need roofers who can advise customers across several waterproofing materials.

6. You are mid-job on a tiled roof and the forecast changes, with heavy rain and strong wind approaching. What do you do?

Why they ask: Tests judgement on weather risk and protecting both people and the property.

7. Tell me about a time you traced and fixed a difficult roof leak.

Why they ask: Shows diagnostic skill and persistence, which matter in repairs and maintenance roofing.

8. What does a typical day as a roofer involve?

Why they ask: Checks realistic understanding of the physical, technical and planning side of the job.

A sample answer to question 1

How do you set out and fix roof battens and tiles in line with BS 5534?

I start by checking the rafter spacing and the manufacturer's gauge for the tile or slate, then work out the batten gauge so the headlap meets the minimum for the roof pitch and exposure. I set the first batten at the eaves so the tile oversails the gutter correctly, and the top batten so the ridge tiles bed properly. Battens should be graded and marked to BS EN 15037-1, fixed with galvanised or stainless nails of the right length, and joints made only over a rafter, staggered across the slope. Under BS 5534 I would mechanically fix according to the wind zone and pitch, which usually means every tile at the verges, eaves and ridges, and a pattern across the field where required. I also use dry-fix verge and ridge systems, because relying on mortar alone is no longer acceptable. Before leaving, I check the lines, laps and that nothing is cracked.

Common mistake to avoid: Relying on mortar to hold ridges and verges; Guessing batten gauge instead of checking the manufacturer's data

Want the rest?

Full model answers, key points and common mistakes for all 16 questions are on the Roofer interview questions page. The first five are free, no sign-up needed.