SIAC was founded in 1913 and has been delivering excellence for over a century. We are licensed contractors for most products with all our own fully qualified installers and staff. The company is fully insured and are one of the few companies registered with the national CIRI and are members of the Construction Industrial federation along with the Roofing and Contractors Association of Ireland.  As part of our quality we have ISO 9001:2008 NQA.  Our commitment to safety and seen us deliver over 1.3million man hours without a reportable accident and we are also member of NISO – to which we have been awarded the All Ireland specialist Safety Contractor Award for 2014. We have own design and drawing office.

Liquid Plastic

Liquid plastic is used in a lot of cases:

  • Upgrades
  • Repairs
  • Refurbishment of a roof

This system is completely seamless: it doesn’t crack or blister. It is a 4-coats application that is easily applied to give a smooth finish and protect the roof against leaking. The system gives a 10 years insurance guarantee and up to 30 years durability.


This product is generally used on flat roofs and is easy to install. PVC is a very flexible product for use with difficult roof detailing situations.

Bituminous Roofs

In a domestic situation, a bituminous roof is normally used on roofs that are either flat or with a very low pitch. This product has a great life expectancy, which is an excess of 10 years. Bituminous product is flexible and useful for many difficult roof details.