Shingles can be fabricated from a wide range of materials such as asphalt least expensive to natural wood metal tiles and heavy slate most expensive.
Slate pitched roof.
Traditionally a minimum roof pitch of 20 was recommended in bs 5534 but modern tiles and slates have now been designed for applications as low as 15.
Wood and slate shingles do not lock together as tightly as other types of shingles.
Generally speaking 20degrees is the lowest advisable pitch for a slate roof depending on the size of the slates and how much that the roof is exposed to moderate weather conditions.
The marley thrutone slate is a perfect example of a low roof pitch option.
It is uncommon to find a roof below 15 but for those very low pitch applications there are interlocking clay pantiles available suitable for use down to 12 5.
Wood and slate shingles are used in many of the same types of roofs as asphalt composite shingles but may not be appropriate for roofs near the lower end since they are more susceptible to leaking.
When slating with a shallow pitch a wide slate is highly recommended for maximum side lap or lateral lap side overlaps.
What are the challenges of a low pitch roof.
Pitched roofs are most often associated with asphalt shingles although standing seam roofs are becoming ever more popular on pitched roofs as well.
You consider some alternative solutions.
Slate is a natural material with unmatched technical features which lasts over 100 years.
The headlap of the slate is adjusted according to the roof pitch.
Many problems that arise from the installation of a low pitch roof derive from poor installation or lack of maintenance.
Roofing materials at a glance.
It is agreed that the roof pitch should be a minimum of 20 degrees preferably a bit more.
Roof slates at burton roofing merchants we stock a wide range of cupa pizarras natural slate roofing tiles that are perfect for repairing your existing roof or installing a new sloping roof.
A couple of likely slate suppliers are consulted and they confirm that they are happy to supply 600x300mm slates for a minimum roof pitch of 20 degrees assuming a minimum lap of 125mm.
So whether you re looking for pitched roof insulation or ventilation pipe flashing or tiles we ve got everything you need for your next big project.
Headlap as defined in the national slate association s slate roofs design and installation manual 2010 edition is the length in inches of the upper portion of a roofing slate that is covered by the butt of the slate two course above.