SLE Cladding Limited

For further information please contact SLE Cladding Ltd. Tel. 01948 666 321. Fax. 01948 66 55 32

ONDUTILE

New 24mm Isoline base sheet

Picture shows standard Onduline 38mm sheet previously used as a Ondutile sheet above the new 24mm Isoline Ondutile development.

ONDUTILE DEVELOPMENT

Since its introduction on to the UK market in 1989, the Ondutile system has been continually developed to become the acknowledged market leading independent secondary weatherproof roof underlay system for low pitch tile, slate and applications and shingle applications.

Reduced roof pitches for tiles slates and shingles

Immediate weather protection

Easy to handle and fix on site

Improved ventilation, moisture control and thermal performance

Security of durable secondary roof

New Ondutile Lowline base sheet

With the introduction of a new Onduline low-line base sheet the Onduline system now offers the choice of two base sheets to select from.

Existing Onduline PPHR high ventilation.
This proven tile underlay base sheet maximises sub roof ventilation and gives outstanding above and below the sheet providing weathering performance.

New Onduline Lowline 24mm Low profile.
Provides the same durable weathering performance whilst reducing the roof section making it ideal for projects on which the height restriction or the aesthetic appearance of the roof line is of paramount importance.

A typical snow cover tile roof with 24mm Isoline base sheet

FIXING SPECIFICATION
The detailed design and fixing instructions are described in the Onduline leaflet. The main difference in the fixing instructions bring the size and type of the fixing required to nail through the tile batten through the top of the low-line sheet corrugation and into the Onduline support batten or decking.
Please refer to the main Ondutile leaflet mechanical fixing section (CLICK HERE) and amend as follows :-

Mechanical fixing specifications
Ondutile low-line base sheets are laid with a double corrugation side lap and 200mm end lap. A sheet under normal conditions will provide 1.7m2 coverage compared to the 1.5m2 of a standard Onduline PPHR sheet.

Onduline 24mm Lowline profile. Reduction in roof section 24mm

24mm Isoline base sheet

So now the choice is yours. Select either the existing proven Ondutile; or the new Ondutile Low-line profile base sheet to suit your roof design requirements. Allowing roofing tiles and slates to be laid below the manufacturers minimum recommended roof pitch with confidence. Lower your roof pitch not your expectations

Type	Colour	Dimensions	Weight	Corrugation width	Corrugation Height	Ventilation per sheet	Profile
Onduline PPHR	Black	2m x 0.950m 10 corrugations	6.4kg	95mm	38mm	17,000mm per lin. metre

Onduline Lowline	Black	2 x 1056m 22 corrugations	6.5kg	48mm	24mm	10,500mm per lin. metre

ROOF VENTILATION

Ondutile forms a cold roof section and requires ventilation above and below the Onduline sheet, if decking is used, slots in the decking can be provided at high and low levels to form ventilation channels utilising the sheet corrugations which contribute 10,500mm2 per linear metre ventilation to the total ventilation requirement This is sufficient low level ventilation at the eaves
Roof pitches of 15%v or more requiring 10,000mm2 per linear metre high level. The ventilation requirement is set out in the Ondutile leaflet

Above drawing showing high level of ventilation below tiles

NOTE. Being a new product. At the time of writing the "Ondutile Lowline" base sheet is not covered within the existing BBA certification.

For further information please contact SLE Cladding Ltd. Tel. 01948 666 321. Fax. 01948 66 55 32

Sheet end lap	200mm
Sheet coverwidth	1.800m
Sheet side lap	2 corr. 96mm
Sheet cover	1.800 x 0.960m
Average sheet coverage	1.700m2