Frequently Asked Questions

Can I use Britmet tiles on coastal areas?

Yes, however for coastal areas, stainless steel or copper screws must be used.

Can Britmet granulated tiles and LiteSlate be used on any type of building?

Yes, we have been manufacturing tiles for all types of roofs since 1976. As long as the pitch is above 5°, we have many tiles to suit.

How long does it take to install a Britmet Roof?

Each profile varies but we estimate that Britmet lightweight tiles will take 1/5 of the time that traditional tiles take to install. This is because our tiles are the equivalent width to 5 traditional tiles and the height of 1.

How long will a Britmet roof last for?

We offer a warranty of 50 years against weather penetration, however we have proudly outlived this.

Are Britmet tile profiles environmentally friendly?

Britmet metal tiles are recyclable at their end of life (as long as you remove the stone granules). The sustainable building industry considers steel a 'sustainable material' as it is continuously recycled at a global scale. We are proud owners of an ISO14001 accreditation which showcases our low environmental impact.

Britmet LiteSlate, our synthetic tile, is made from over 90% of recycled polymers. Britmet LiteSlate is 100% recyclable at end of life.

Can I use Britmet for a conservatory roof replacement?

With the new permitted development policy in place, conservatory roof conversions from a glass/polycarbonate roof to a solid tiled roof, no longer require planning permission. Due to the lightweight nature of our tiles, there are no risks for the existing framework of the conservatory. Our lightweight tiles are ideal for conservatory roofs and can be seen on conservatory roofs across the UK.

How light are Britmet roof tiles compared to other roofing products?

  • LiteSlate – 12kg per m2
  • Shingle – 7.3kg per m2
  • Slate 2000 – 7kg per m2
  • Ultratile – 7kg per m2
  • Villatile – 7kg per m2
  • Profile 49 – 7kg per m2
  • Plaintile – 8kg per m2
  • Pantile 2000 – 9kg per m2

Have Britmet roof tiles been tested in extreme weather conditions?

Our metal tiles have a BBA backed 50-year warranty against weather penetration when installed correctly. Please see our certifications and accreditations for more.

Will a Britmet roof be noisy in the rain if it’s a metal tile?

No. The space between the roofing tile and the underlay minimises exterior noise.

Is a steel roof fire-safe?

Our metal tile profiles are made from the highest grade Aluzinc steel and has achieved AA classification equal to traditional roof tiles and slates.

What steel is used to manufacture the Britmet tiles?

Britmet's metal granulated tiles are made from the highest grade Aluzinc Steel. Each tile provides unmatched strength and exceptional performance when compared with traditional roofing materials.

How do Britmet Roofing products reduce transport costs compared to traditional roofing materials?

When compared with traditional concrete and clay roofing materials, Britmet (0.45mm) tiles are 1/7th the weight. As a result, one pallet of Britmet tiles can offer the same coverage as seven pallets of traditional roofing materials. This also reduces our carbon footprint.

Is a Britmet roof easy to maintain?

Britmet lightweight roofing materials are renowned for being virtually maintenance free with a 50-year warranty!

How does the anti-vandal gauge work?

Britmet Lightweight Roofing manufacture lightweight tiles in both 0.45mm and 0.9mm thicknesses. As our tiles are fully dry-fix, this means vandals are unable to lift the tiles from the roof via hand, however, 0.9mm thickness provides our clients with the best anti-vandal properties, increasing security and protection from foot traffic.

What certifications do Britmet tiles hold?

Please see our certifications here.

What flashings and accessories are available for a Britmet roof?

Each tile profile has an extensive range of lightweight flashings and accessories required for a full roof installation while compling with the BBA backed 50-year warranty. We are even able to offer a hire service for guillotines and benders or supply roof windows, such as Velux and Fakro, with your order.

I have no experience of fitting a roof, can you help?

Britmet are happy to help with full customer support and after-care. From concept to completion, we can assist with planning, quotation and installation. All of Britmet's lightweight roofing tiles are DIY friendly and we have a range of YouTube tutorials to follow or PDF installation guides. Our sales team are always on hand to answer any questions or offer extra technical support. If you have any reservations about installing your own roof, we are happy to assist with finding a contractor local to you with an abundance of experience using our tiles.

I have a flat roof that I would like to raise a pitch on, is Britmet suitable?

Britmet are proud the total roof solution including lightweight roofing profiles that are ideal for a flat to pitch roof conversion. Pantile 2000 can be installed to pitches as low as 5 degrees.

How do the stone granules stay on the steel?

An acrylic primer is applied to the steel then graded stone granules are embedded in a UV resistant, water base acrylic polymer and sealed with a final acrylic glaze before it is cured in the oven.

If Britmet tiles are made from steel, does that mean that they will rust?

Our Aluzinc steel is formulated to offer a substantially longer service life as it combines the sacrificial protection of Zinc and corrosive protection of Aluminium. This means that the end product reinforces corrosion resistance so that it's perfect for roofing.

Will the granule colour fade?

Britmet have proudly out-lived their roof guarantee and our roofs clearly showcase the true test of time. The highest quality pigments are used, however it is possible that over time a slight change in colour may occur due to air pollution, however regular rainfall or even rinsing the roof with a garden hose will keep your roof looking fresh.

What are the weight comparisons between Britmet and traditional tiles?

What are the weight comparisons between Britmet and traditional tiles:

Product Weight/sqm
Liteslate 12kg
Shingle 7.3kg
Slate 2000, Ultratile, Profile 49, Villatile 7kg (0.45mm) & 11kg (0.9mm)
Plaintile 8kg (0.45mm) & 12kg (0.9mm)
Pantile 2000 11kg
Standard Asphalt Shingle 15-25kg
Traditional clay/concrete tiles 45kg+ (the weight of these products increase when wet.)
Does Britmet offer a warranty?

Yes. When installed to the installation guide, Britmet roofs have a 50-year warranty. If you are apprehensive about DIY installation, we have an extensive list of installers near you that we are happy to recommend.

Will Britmet build a specification for my job?

Britmet are proud to offer full specifications at no charge to their specifiers.

Will Britmet help me with a supply and fix price?

Britmet work with an extensive list of approved roofing contractors and can help provide you with a supply and fix budget quotation.

Can I fit solar panels on a Britmet roof?

Yes, Britmet can now supply the full system if required.

Can I fit roof lights/roof windows in a Britmet roof?

Britmet work closely with many roof window manufacturers and have a flashing kit to suit all types of windows.

If Britmet tiles are made from steel, does this mean that they condensate?

An insulation layer is added above the rafters and below the rafters are a waterproof, breathable membrane; this allows moisture to escape avoiding any damp spots or mould build up. Within the UK market, this is perceived as the most suited form of roofing due to the climate as it provides a cost and thermally effective solution.

What happens if a Britmet roof gets struck by lightning?

Steel roofing materials are not more susceptible to lightning when compared with other roofing materials. It has been demonstrated that lightning strikes most frequently the highest points of terrain. Where concerns exist, lightning rods can be installed on roofs that are the highest point of surrounding terrain.

What is a Britmet CPD?

CPD stands for ‘continued professional development’. The purpose of our CPD is to explore the benefits of the Britmet roofing solutions and products and how they work. It consists of a team of 3 people or more, observing a Britmet presentation presented by our specification managers that can also answer any questions there may be at the end of the CPD.

Some examples of what we discuss are:

  • Our one-of-a-kind structural liner tray (Tactray 90)
  • Flat to pitch conversions
  • Rooftop developments
  • Plenty of case studies of previous projects
How long does a CPD last?

Approximately 1 hour depending on feedback and questions.

How are CPDs carried out?

Given the current COVID-19 restrictions, all CPD’s are currently carried out virtually on platforms such as Teams or Zoom. We aim to get back to face to face CPDs when it is safe to do so.

What are the benefits of a CPD from Britmet?

The main benefit is expanding your knowledge of the lightweight roofing world - it is always interesting to see how we may be able to help with future or upcoming projects. Another bonus is that we also provide free Domino’s pizza for face to face CPDs!

How do I book a CPD with Britmet?

Call our offices on 01295 250998 or email Our team are always happy to help.

Jargon Buster


Abutment: Where a Roof meets the side of a wall, dormer or chimney.

Apex: An Apex roof has a slope on either side of the roof (The word ‘Apex’ can also refer to the highest point of the roof where the two slopes meet.


Barge: A barge is a flashing fixed to the roof on a gable end (the slope).

Batten: A length of timber placed horizontally across the rafters, used to secure tiles/slates.

Batten Gauge: The measurement determined by the size of the tile/slate for space between each batten. **Correct batten spacing is essential for a weatherproof roof.

BBA: British Board of Agrément is a certification within the construction industry, indicating a high quality, experienced and reliable company or product. A BBA status is highly regarded and used by manufacturers in the industry as a symbol of superiority.

Bond: A description of the way tiles are laid eg, broken bond.

Building Preservation Order: Under Section 3 of the Planning (Listed Buildings and Conservation Areas) Act 1990, this order protects buildings of 'architectural or historic interest' from any demolition or alteration deemed harmful to the building’s character.


Cold Roof: A roof design where the insulation is laid between ceiling joists. This means that everything that goes above the insulation, eg, rafters, will be considerably colder than the space below it.

Condensation: The meeting of hot air and cold air causes water vapour in the atmosphere to turn to liquid. Eg, rising heat from the inside of the house and the cold underside of the roof covering will cause condensation.

Counter Batten: A vertical batten along the lines of the rafters, used where the frame has been boarded to give space where the felt/membrane and battens are fixed.

Course: A horizontal row of tiles.

Cover Width: The coverage of the tile across the width measurement.

CPD: Continuing Professional Development is the term used to describe the learning activities professionals engage in to develop and enhance their abilities.


Dry Fix: Secures the roof tiles to the roof without any cement.


Eaves: The part of a roof that meets/overhangs the walls of a building.

Environmental Impact Assessment: An Environmental Impact Assessment is a procedure that evaluates the impact a development may have on the environment.


Finial: A distinctive section or ornament at the apex of a roof, canopy etc.

Flashings: A material/accessory used to waterproof any change in surfaces of a waterproof system.


Hip: A protruding/sharp edge of a roof


Interface: Interfaces are areas of interaction between two or more aspects of a project. Physical interfaces happen when contractors are engaged in the same project or if their work interacts, whereas relationship interfaces happen between different project stakeholders; including contractors, legislative bodies, local communities etc.

Inverted Roof: An inverted roof, also referred to as a ‘protectedmembrane’ or ‘upside down’ roof, is form of flat roof in which the waterproofing layer is beneath the thermal insulation rather than above it.


Lambda Value : The Lambda value is used for thermal calculations on buildings and thermal components. Lambda value is relevant for heating applications in domestic and commercial buildings.

Lightweight Roofing: Lightweight roofing is a roofing material that weighs under 20Kg per square metre when fixed on a roof.


MMC: Modern Methods of Construction is a wide term, embracing a range of offsite manufacturing and onsite techniques that provide alternatives to traditional house building.

Monopitch: Only having one slope on a roof/building

Monoridge: If the monopitch roof is not attached to any other building, a ridge capping called a Monoridge can be used to waterproof the ridge.


Overhang: Part of something that extends or hangs over something else.


Part B: Fire Safety Building Regulations.

Part L: Building Regulations that means that the whole of that roof must be brought up to the thermal efficiency demanded by the current regulations.

Permitted Development: Under the terms of the Town and Country Planning Order, 'permitted development' relates to the permission for limited and minor forms of development without the need to make an application.

Pitch: The steepness of the slope of the roof

Purlin: A horizontal beam along the length of a roof, resting on principals and supporting the common rafters or boards.

PV (PhotoVoltaics): PhotoVoltaics (known as PV) are modules that convert sunlight directly into DC electricity and can be integrated into roofing systems.


Rafter: A rafter is a. sloped structural beam, such as wooden battens, that extend from the ridge or hip to the wall plate, downslope perimeter or eave, and that are designed to support the roof deck and its associated loads.

Ridge: Sometimes known as the peak of the roof or the highest point on a roof, represented by a horizontal line where two roof areas intersect, running the length of the area.

R-Value: An R-value is the measure of resistance for heat flow through the thickness of the material.


Side Lap: The amount by which one material, tile, shingle, etc. overlaps the adjacent one along its side or edge.

Soaker: A weatherproofing product that has been designed to sit between a tile and an object that protrudes from the roof/abutment.


Tender: A tender is a submission made by a prospect to supply a tender invitation. Within the construction industry, this is generally the selection of the contractor that will construct the work.

Truss: A framework, typically consisting of rafters, posts, and struts to support a roof.


Underlay: A water-resistant or waterproof barrier material that is installed directly onto your roof deck. It is applied under all other roofing materials as an added layer of protection from severe weather.

U-Value: Thermal transmittance (also known as U-value) is the rate of transfer of heat through a structure (which can be a single material or a composite), divided by the difference in temperature across that structure. The better-insulated a structure is, the lower the U-value will be.


Valley: A roof valley is formed where two roof slopes meet. Water collects in a valley to flow off the roof.

Verge: The edge of a roof which runs from eaves to ridge at a gable (also known as a barge).

Vertical Tiling: Another word for cladding.


Warm Roof: A warm roof is a type of roof construction which has an insulation layer above the rafters, and immediately below its weatherproof membrane