Ask The Expert
The Questions
Q: I have a job to insulate a large flat roof…
A: David Khan, technical marketing manager, Knauf Insulation
Q: We have a new village hall using a glulam beam construction with a pitched roof and metal (metrobond) tiles. When the temperature falls below zero, we suffer from bad condensation and water drips from the underside of the ceiling. Please advise…
A: John Dodd – Marley Eternit
Q: I need Dew Point Calculations for a roof with 270mm mineral glass fibre insulation above and between roof joists
A: Paul Burrows – Knauf Insulation
Q: What is the difference between an intensive and an extensive green roof?
A: Steve Cleminson
Q: How permanent is a black finish on each of the above?
A: Graham Smith
Q: In terms of value-for-money, how do cast iron, ‘solid’ aluminium, formed-on-site aluminium, glass fibre and plastic gutters compare?
A: Graham Smith
Q: When do I need to upgrade the insulation on a refurbishment?
A: Ken Francis
Q: What is the difference between a SAP rating and U-values? Are there any minimums now that Part L is changing?
A: Ken Francis
Q: How do drainage issues for green roofs compare with those for typical flat roofs?
A: Steve Cleminson
Q: What is the difference between an intensive and an extensive green roof?
A: Steve Cleminson
Q: Fall on gutters – can I use zero fall if I go for a section with a lot more capacity than I need?
A: Graham Smith
Q: Do green roofs place more of a burden in terms of weight on the rest of the structure?
A: Steve Cleminson
Q: How do drainage issues for green roofs compare with those for typical flat roofs?
A: Steve Cleminson
Q: I am researching the UK market for liquid applied roof coatings of all types. Can you advise me where I can find information regarding the total UK market size?
A: Mike Bradbury FIoR – Liquid Roof Coatings
Q: What options would you recommend for waterproofing an asphalt-covered roof?
A: Mike Bradbury FIoR – Liquid Roof Coatings
Q: What metal liquid membrane should I use for the roof of my 400-year-old house in Malta?
A: Mike Bradbury FIoR – Liquid Roof Coatings
Q: What are the major issues with green roofs?
A: Steve Cleminson
The Experts
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