After the wettest summer in record in the UK last year and more than our fair share this winter, it is almost certain one roof construction has been rigorously tested! Flat roofs can be notorious for ponding water if the deck has not been designed with a sufficient fall. Ponding water on a flat roof can cause stress on the deck structure by adding excess weight and also often lead to leaks.
Introducing a tapered insulation scheme to a flat roof achieves a fall ensuring the roof drains properly and reduces the risk of ponding. Tapered insulation schemes are suitable for both new build and refurbishment projects and whilst helping to beat the weather they also improve the life expectancy of a flat roof.
There are three main methods of creating a fall; however a tapered insulation scheme has been proven to be the most successful and cost effective solution. Alternative methods include; screed laid to a fall and timber firings under a plywood deck. Research has shown that whilst a screeding method is 10% more expensive than a tapered insulation scheme, using timber firings can increase the cost by 33%!
Besides the cost saving advantage, a tapered insulation scheme has numerous additional advantages over against alternative methods;
- Provides insulation and effective drainage in one system
- Eliminates the problem of water ponding
- Reduces strain on deck structure
- Cost and time savings on installation
- No drying time compared with screed
- Improves life expectancy of flat roofs
- Suitable for both new build and refurbishment projects
By specifying a tapered insulation scheme you are reducing the risk and ensuring a lasting flat roof!