SL8

SL8

We’ve listened to our customers and created another innovation to meet the increasing demands of the roofing market.

The SL8®roof tile has the visual characteristics of natural slate with benefits that no other interlocking tile can match.

  • A thin leading edge for impressive aesthetics.
  • A wider format for a more traditional slate appearance.
  • Superior coverage at just 8 tiles per square metre.

All Forticrete products are CE marked where appropriate.

For fixing specifications please visit myforticreteroof.co.uk.

Technical Innovation and Reassurance

Through our innovative design and manufacturing technology the SL8® offers superior coverage – just 8 tiles per m2 compared with 10 per m2 found with many alternative products.

Technical benefits include:

  • 20% reduction in the number of tiles used resulting in fewer tiles to handle and lay.
  • Tiles are factory blended to ensure fewer colour batching variations.
  • A full range of maintenance free, mechanically fixed accessories is available.
  • Technical support, including full fixing specifications.
SL8 roof tile, red

SL8

We’ve listened to our customers and created another innovation to meet the increasing demands of the roofing market.

The SL8®roof tile has the visual characteristics of natural slate with benefits that no other interlocking tile can match.

  • A thin leading edge for impressive aesthetics.
  • A wider format for a more traditional slate appearance.
  • Superior coverage at just 8 tiles per square metre.

All Forticrete products are CE marked where appropriate.

For fixing specifications please visit myforticreteroof.co.uk.

Please fill in the form below to request a printed version of this product’s brochure, alternatively download an e-version on our Resources section.

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Can I install a conventional roof light with Forticrete Roof Tiles?

In most cases there is a suitable conventional roof light flashing kit which can be used with our products down to a roof pitch of 15 degrees. Forticrete would not recommend the installation of a conventional roof light below 15 degrees with profiled tiles.

Conventional roof lights when fitted below 15 degrees under certain weather conditions my seep water over flashing. Forticrete have a Low Pitch Roof Window solution, which when used with Forticrete Centurion tiles can be used at a pitch as low as 10 degrees.

Can your tiles be used for vertical tiling?

All of Forticrete's tiles, with the exception of Centurion (as it has no nailhole) can be used for Vertical Tiling.

Forticrete's single lap tiles need to be (Gemini, Minislate, Senator and V2) will need to be screwed and clipped and the corners will need to be mitred with a lead detail.

Forticrete's Double Lap Tiles (Hardrow and Concrete Plain Tiles) require every tile to be twice nailed, but also have internal and external angles for the corners.

Do I need to ventilate my roof if I am using a breathable underlay?

Ventilation and control of ventilation is covered under BS 5250: (Code of Practice for control of Condensation in Buildings).

General information relating to traditional cold roof spaces

Breathable underlays work by transferring moisture laden air from inside the building into the batten cavity (the area between the top of the underlay and the underside of the tiles) where it is allowed to ventilate out between the gaps in the roof tiles or slates.

The gaps in between the tiles or slates will vary depending on the manufacturer and therefore additional ventilation may be required at the eaves or ridge line to assist in drawing the air in the batten cavity out of the roof.

Condensation forming on the back of the roof covering without adequate batten cavity ventilation may result 'Lime Staining' on the face of the tile.

In Forticrete's opinion additional ventilation should be provided at high level in the form of a ventilated ridge line. If the selected tile is flat additional ventilation should be used at the eaves.

Please consult with the tile, and underlay manufacturer for further advice.

General information relating to Warm Roof Spaces

Where the insulation is positioned between and on top of the rafter to the appropriate insulation level and is fully sealed is known as a warm roof.

In this instance no additional ventilation is required.

 

How many tiles are required for my roof?

Forticrete can provide a free take off service for roof areas in excess of 60m2 which will give an estimate of how many tiles and fittings you will need to order.

It is important that you fully specify what tiles, fittings and ventilation you require by filling in all parts of the estimate request form which is available as a word document or pdf format.

Side elevations and roof plans will be required with dimensions clearly marked on them.

All estimates are given as a guide that should be checked prior to ordering as any extra costs incurred due to over or under ordering will not be covered by Forticrete.

Please allow up to fifteen working days for return.

Site specific fixing specifications in line with BS5534 should be obtained prior to installation. You can request a fixing specification by visiting; www.myforticreteroof.co.uk

How much ventilation do I need for my roof?

For duo pitch roofs over 15º and below 35º an eaves ventilation of 10,000mm/m² is required when the insulation is placed at ceiling level and 25,000mm/m² when the insulation is inclined to the rafters. For roof pitches over 35º or where the span across the gable end is greater than 10m, 5,000mm/m² high level ventilation is required.

For mono pitch roofs over 15º the eaves requirements are the same as for duo pitch roofs but high level ventilation is required at all pitches.

For all roof types below 15º the eaves ventilation requirement is 25,000mm/m²

How should I fix the tiles on my roof?

The exposure, location and roof design are all factors that will influence the tile fixing specification.

it is important that site and house type specific fixing specifications in line with BS5534 are obtained prior to installation.

Should you require a full fixing specification for your project, please visit www.myforticreteroof.co.uk.

I have a roof pitch that is below the minimum recommended pitch for your tile. Is there anything that can be done?

Our roof tiles have been designed to perform down to their respective minimum pitches.

Below these pitches concrete tiles become purely decorative, and require a secondary waterproof barrier to be employed to carry any water down to the eaves and effectively discharge into the gutter.

There are several manufactures' that provide corrugated sheeting systems but these will always raise the overall height of the roof.

Otherwise a marine plywood deck can be installed with counter battens.

Apertures created in flat sub roof sheeting will have to be fully sealed around the up stands to allow water behind the opening to discharge around it.

Apertures cut into corrugated sub roof systems are not allowed as water in the corrugations above the junction will be trapped.

For further information please call the Technical Department on 01525 244900.

I have old tiles on my roof which have Anchor written on the back?

Anchor was taken over by Forticrete, though many of the tiles have since been withdrawn or have passed through product development. Generally the newer tiles do not course in with the older tiles.

One method that can be used is to find a porch or small dormer with the old tiles, use these for repairs, and then use the newer tiles for re-roofing the porch or dormer, as these are generally separate from the main roof.

What batten spacing should I be using for my tile?

Please refer to the specific product details within the website for individual product information relating to batten spacing.

Which lead detail should I use at side abutments?

For flat profile interlocking tiles the recommended method of protecting a roof/wall junction is to install a continuous cover flashing and a secret gutter. With profiled interlocking tiles the recommendation is to provide a continuous cover flashing in lengths not greater than 1.5m. 

Why are my Valley slates not lying flat causing the tiles to lift on either side?

There are a number of things to check:

  1. The rafter pitch and the actual pitch of the valley slate on site should be checked ..are they the same

  2. One of the pitches is out therefore a bastard valley should have been used.

  3. The batten gauge is not the same either side of the valley.

  4. The valley does not bisect the angle on plan equally through 45º or 135º which ever way you look at it.

  5. Is the angle on plan 90º?

Why do I have more RH ¾ tiles than LH ¾ tiles?

Wherever possible tiling should be carried out from right to left beginning with a full tile on the very first course then introduce a RH ¾ tile on the course above and on alternative courses thereafter, this will achieve the broken bond in the tiling pattern.

At the opposite verge or hip/valley a tile & half would be introduced and cut to suit.

The LH ¾ would only be used when tiling on a LH verge into a hip or valley.

The LH ¾ tile is minus the interlock and this is an easy way to distinguish the difference between the LH & RH ¾.

As with the RH ¾ tile this would also be used on alternative courses.