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Roofing & Roof Windows

N. G. Bell & Son Ltd offers a comprehensive range of quality roofing products including natural slate, fibre cement slate and roof tiles sourced from the leading manufacturers around the world.

Natural Roof Covering

Our passion is to source natural slate from around the world with an emphasis on quality. This has culminated in a unique collection of natural roof coverings.

Tegral Building Products

Villar del Rey, with its distinctive smooth surface, fine grain and dark charcoal-grey colouring is the superior Spanish slate in the Tegral Natural Slate range. Villar del Rey slates are very easy to grade and lay due to their uniformity in size and thickness.

  • 75 year guarantee
  • Exceptionally smooth surface
  • Easy to grade & lay
  • Pre-holed
  • Subtle natural tonal variations on roof


Bretona natural slates are mid-grey in colour with a coarse texture and are well suited where an obvious natural, rugged look is required. Bretona slates are a strong and consistent roofing product and are an excellent choice for both domestic housing and commercial applications.

  • 50 year guarantee
  • Strong slate
  • Attractive textured appearance
  • Handles well
  • Natural tonal variations on roof
  • Affordable
  • Available in two different grades


Torres slates are durable, good quality slates sourced from Northern Spain and are mid-grey in colour with a lightly textured surface. The slate quality allows splitting into flat, even product with a nominal thickness range of 4 to 7mm. Torres is a reliable natural slate suitable for all applications.

  • 50 year guarantee
  • Consistent thickness
  • Lightly textured appearance
  • Traditional mid-grey colour
  • Natural tonal variations on roof


Campo® Lombao has a rough texture which creates a rustic, rugged and substantial appearance on the finished roof. Quarried in the North West of Spain; the Campo®  Lombao quarry is extremely versatile. By working closely with CAPCO Roofing our partnership enables us to offer products tailored to the specific requirements of the client's design brief, allowing us to offer slates to suit any headlap.

Campo® Lombao slate is expected to exceed the life of the building. A formal manufacturer backed guarentee is given for a 75 year period on Prestige slate, for 50 years on Heritage slate and for 30 years on Traditional slate. This is considered sufficient for all legal and contractual purposes. Campo® Lombao comforms to BS EN12326-1:2004 - Slate and Stone products for discontinued roofing.


Well known for its distinctive beauty and durability, we have been supplying Gallegas® slate for almost 10 years. The Gallegas ® quarry is one of the most modern in Europe and is unusual in that it is one of the very few which are "Underground". The slate is extracted from the mine using saws which ensures that the Gallegas ® slates are very uniform, requiring minimal grading.





Fibre Cement Slate


Manufactured using the latest coating technology, ThrutonePlus slates offer the best of both worlds in terms of beauty and function. The slates, produced in Ireland for the Irish market, are surface coated using a new multi-stage colourisation process, which includes colour matched edge coating. This innovation, combined with a traditional fixing system that ensures every slate is attached in three places, creates a roofing product unsurpassed for quality and security.

Tegral offer ThrutonePlus slates in two textures; Smooth and Relief and in a variety of shapes and colours including the ever-popular Blue-Black colour. The textured surface and square edges of ThrutonePlus Relief provide a subtle change from the normal smooth finish and create an enhancement to the overall aesthetic quality of the roof.

  • 20 year colour guarantee
  • Colour-coated edges
  • Three point fixing system
  • No grading required
  • Pre-holed
  • Low weight
  • Versatile for complex roofs


Capco Roofing offers the highest quality fibre cement slate products sourced from Europe's leading manufacturers. Fibre Cement slates are manufactured from Portland Cement combined with compressed, high quality synthetic and cellulose fibres.

Fibre Cement slates offer an economic roofing solution, offering an alternative to natural slate products. Highly engineered, they provide a uniform finish which facilitates rapid on site installation with a minimum of waste.

Modern technologiccal advances made by leading Fibre Cement Manufacturers in Europe have led to an increased life span for the product for both structural integrity and colour, ensuring peace of mind for the homeowner and specifer alike.

Roof Tiles

Northstone Scott

Northstone Materials Division manufacture Scott Roof Tiles at its state of the art Tile Plant in Toomebridge, Northern Ireland.

The Scott Roof Tile brand offers a unique range of roof tiles designed to complement all types of buildings, from the one off self build project through to  the largest housing development, educational establishment, or commercial property.

Scott Roof Tiles have been manufactured in Northern Ireland since 1964 and our experienced staff ensure the products enviable reputation for quality is consistently maintained. All roof tiles are manufactured to the latest European standard, BS EN 490 and to the recognized quality management system, BS EN ISO 9001.  Our investment in a new manufacturing facility at Toomebridge, which opened in 2009, is one of the most modern roof tile factories in Europe.

A full range of roofing accessories is also available to match the roof tile profiles including a comprehensive selection of dry fix ridging and dry verge solutions.

The Derrie Mk2 has a traditional double roll pattern which has a proven performance record for over forty years. The double roll gives the tile an inherent strength and good wind loading. The Derrie Mk2 can perform well at lower pitches.

The Galloway is a thin, leading edge tile with the appearance of slate, this durable, attractive design is 40% thinner and 15% lighter than traditional flat tiles, offering real cost and fitting benefits. Easy to fix with no special fittings or top and eave course required.

The Donard has a traditional flat tile pattern profile offering the clean lines and smart finish of an interlocking slate pattern and is available in eight colours. The Donard has good wind loading and anti capillary features ideal for performing in the Northern Ireland climate.

Monier Redland

Redland is a brand of the worldwide Monier Group. Our range of roofing tiles includes concrete roof tiles, slate roofing products and clay tiles. Coupled with renewable energy systems, metal roof sheets and accessories, Redland provides solutions for most roofing specifications.

Cambrian Slates embody the beauty and character of natural slate. Made in Wales from over 60% recycled Welsh slate, Cambrian tops the range in both looks and performance and has a proven track record even on pitches as low as 15°. Whilst light in weight, Cambrian's unique three point fixing makes it suitable for even the most exposed sites.

MIni Stonewold is a flat concrete slate which can be laid at pitches as low as 17.5°, for new build or re-roofing applications. Our most economical concrete slate with interlocking edges for simple construction.

Roof Windows

Fakro Roof Windows

Fakro roof window, skylights and loft access solutions. A wide range of products to introduce light to your home or transform attics into comfortable living spaces. With a wide range of roof window sizes, designs and combinations and a choice of center pivot, top hung or side hung. A full range of blinds and accessories are also available. See the light with Fakro and N. G. Bell.

Sizes of window:

  • 55 x 78cm
  • 55 x 98cm
  • 66 x 98cm
  • 66 x 118cm
  • 78 x 98cm
  • 78 x 118cm
  • 78 x 140cm
  • 94 x 118cm
  • 94 x 140cm
  • 114 x 118cm
  • 114 x 140cm
  • 134 x 98cm
  • 78 x 160cm

Fakro Roof Windows carry BBA Certificate, IAB Certificate and are CE Marked.


Accessories to Windows

Roof window accessories combine funtionality and attractive looks. They control the amount of light, reduce excessive heat flow and save energy in winter. The wide range of types, patterns and colours of accessories ensure harmony with the decor of any interior and pffers the possibility of creating all kinds of atmosphere in the loft. Among accessories providing protection from overheating are: awning blinds, external roller shutters operated manually and roller shutters operated electrically.

Electronic Controls

Fakro offers modern electronic control systems to operate roof windows installed above head height and out of easy reach. Control systems and their parts for control of roof windows and window accessories can be selected to suit particular client requirements. Control systems fitted with motors can operate by remote control or wall switch. They will also operate rain, wind or smoke sensors.

Windows can be also equipped with external electric roller blinds and internal blinds.

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