BEWARE: Compatibility with other materials
Again, this is why it’s important to include an experience zinc roofer in your design phase as well as your construction phase due to knowledge about the system.
For example, there are important considerations to bear in mind such as certain materials that will come into contact with zinc.
Certain products can have detrimental effects on the appearance or even the structural integrity of the zinc.
Acidic products which generate galvanic reactions must not be used; neither should products with pH balances lower than 5 or higher than 7. Also combining zinc and other metals like copper and mild steel can also produce galvanic reactions and can lead to the corrosion of the zinc.
This can make the cladding of the roof or wall fail.
Compatible metals include:
- Aluminium (painted, anodised or bare)
- Galvanised steel
- Stainless steel
- Scots pine
Other approved materials:
- Non-acetic silicones
- MS polymer mastics
- Organic timber treatments
Use a professional! Even if you might be following design recommendations, it is critical, especially in the case of using VMZinc that is used safely and in the correct manner by a trained professional.
VMZinc provides additional training for installers who offer metal roofing and cladding in partnership with the Lead Sheet Association.
It’s this training that is designed to train professionals with specific information which is particular to the VMZinc brand.
Again, when using a particular supplier like this, VMZinc also recommends that you choose a contractor that is a member of roofing associations like Traditional Metal Roofing Contractors.
Our clients can have peace of mind that we are specially trained and have been accredited by VMZinc. ELC roofing has experience profiling and folding the zinc, protecting it and soldering it.
What’s important to know, especially in the case of working with a designer is that before the installation of the zinc roofing panels, the surface below the flashing must be protected to prevent water seepage.
Therefore using a VMZ compatible weather barrier acts as a slip-sheet to allow the zinc roofing panels to expand and contract freely.
VMZinc system facts:
- Lightweight and durable
- Minimal expansion and creak
- Fully recyclable
- Design life of 80 years
- Virtually maintenance-free
- Can be installed on pitches from 3°-90°
- Complex shapes can be easily achieved
- Zinc panels can be pre-curved to a radius as low as 600mm
- Can be used to cover soffits (box gutter overhangs, etc)
- BRE Green Guide certified/EPD EN 15804
- BBA certified n Conforms to EN 988
- Can be laid in lengths up to 13 metres without the need for expansion steps
- Fire performance rating ‘AA’- BS 476: Part 3 (‘low vulnerability’ class in Scotland)
- Fire classification A1 and A2-s1, d0 according to EN 13501-1:2002
- Available in a choice of either Natural zinc, engraved Azengar or 7 pre-weathered finishes
View one of the zinc suppliers we work with; VMZinc’s standing seam installation guide for more details on how it all works.