Flashing is a thin piece of impervious (doesn’t allow fluid to pass through it) material which is installed to prevent moisture penetration into a building or structure.
There are many materials used for flashing each with their own benefits and drawbacks depending on their application. Such materials include:
- Zinc Alloys
- Anodised aluminium
The purpose of flashing is to avoid moisture penetration into a structure. Flashing will be utilised in a number of areas around a structure, common areas include:
- Apron flashing
- Hip flashing
- Sill flashing
- Valley flashing
- Through/In wall flashing
Some of the more common defects during a building and pest inspection, relating to flashings include:
- Common among older metal based flashings is corrosion and holing to the flashing.
- Inadequately installed flashing.
- We often find lead based flashings which have been cracked.