Roof Replacements

Are you looking to replace your existing roof, re-roof using a different roofing material, or convert a flat roof into a pitched roof? Do you need just a garage roof replacement or hundreds of square metres of roof re-waterproofed? We can help you with any of these, and are happy to discuss what materials or approaches could work best. 


Technically, any refurbishment where more than 25% of the roof needs to be replaced counts as re-roofing. This is relevant because it affects your obligations under UK building regulations. If you are re-roofing then you may need to improve your insulation. In some cases this might make overlaying a better option for you. 

Overlaying a roof

It is often possible to lay a new roofing material over an existing one. This is especially common for flat roofs, where single-ply waterproofing membranes. GPR or a liquid applied roofing can be laid on top of bitumen roofs. The roof decking does need to be in good condition though. Overlaying is a popular choice for extensions or garage roof replacements, where homeowners want a more attractive roof finish than roof felt. 

Roof conversions

Converting a flat roof into a pitched roof is the most common type of roof conversion. We can manage all aspects for you -constructing the roof decking, installing insulation, and either tiling, slating or using another type of waterproofing to finish it off. If you want to convert from a pitched roof to a flat one instead, speak to us and we can assess whether it's possible. 

Why choose NRS as your roofer?

  • Approved roofing contractors for many roofing systems
  • Insurance-backed roof guarantees
  • Public liability and employers liability insurance of£ 10 million
  • Roofers with more than 40 years' experience
  • Fast, free quotes with no obligation

Our roofing services

Flat Roofs

  • Cold liquid applied roofing
  • Mastic asphalt
  • Hot melt roofing
  • Single-ply membranes
  • Fibreglass/GRP roofs
  • Felt roofing

Pitched Roofs

  • Roof shingles
  • Mastic asphalt
  • Tiled roofs
  • Slate roofs


•    Roof decking
•    Roof insulation
•    Chimney repairs

•    Warm roofs
•    Cold roofs
•    Inverted roofs
•    Lead work