External Wall Insulation:

External building walls account for up to 40% of the heat loss (*) of a building thus accounting for the single largest contributing element of heat loss. Rianna Construction Limited fitters are trained and approved installers of the Parex external wall insulation (EWI) system in Ireland.

Parex EWI is the  most efficient and cost effective EWI system with a proven track record. Parex EWI offers an all encompassing solution to building insulation with a large variety of finishes available to meet individual needs with minimum impact during installation and minimum maintenance thereafter.

Benefits of PAREX EWI System

PAREX EWI System

EWI Independent Analysis/Case study

EWI Costing - Typical

EWI offers a range of benefits to the consumer including:

• EWI is the single largest improver of BER than any other insulation system 
• Low in maintenance – colour degradation is less that 1% aver a 30 year period and removes the need for future painting
• Range of finishes – over 48 colours to choose from in plaster finish, range of brick, quoins and other finishes available
• Exempt from planning permission once façade finish in agreement with original finish
• Minimum inconvenience to client during installation
• Only EWI supplier to offer 10 years labour and materials warranty

PAREX EWI installation – 4 step process:

• PAREX EWI involves the fixing of insulation to the outside of all externally exposed walls by means of securing rigid insulation using mechanical and chemical fixing in accordance with PAREX specifications. This system of installation achieves a blanket of insulation to all external walls thus eliminating cold bridging and preventing heat loss with are common when using other systems of insulation.

• Upon successful adhesion of the wall insulation the boards are then reinforced and waterproofed by means of a layering process. This process involves the application of a number of polymer-modified cement base basecoats to which an open-weave fiber mesh is melded. These layers provide strength by way of impact resistance and tensile strength.  

• When the basecoats dry a primer is applied by means of a painting applicator i.e. roller or paint brush. The primer is typically white although more often that not this is changed to match the finishing coat thus achieving a more uniform finish. The primer improves water resistance of the base coat and ensures a better quality adhesion of the finishing coat.

• The final coat consists of a textured acrylic render finish which is applied in a similar fashion to the standard sand and cement finish i.e. by trowel. The finish can be varied to meet specific needs or in accordance with existing building finishes. There are 48 standard colour finishes available from the range although almost all colours can be matched. This finish is low in maintenance only needing to be washed after a number of years in the event of staining and is not subject to fading (approximately 1% over a 30 year period). This low maintenance long life finish removes the need for future painting unless an individual would like to change the finished colour for some reason.

For additional information on the PAREX system including details of the available finishes please visit the PAREX product website http://www.parex.com/products.pl

PAREX EWI installation – Pictures of completed projects in Ireland

The pictures shown below are indicative of what can be expected as part of the Parex EWI completions. As identified above all the finishes shown below are durable, long lasting with minimum discolouration (1% over a 30 year period) and extremely low in maintenance as they remove the need for future painting.

Parex EWI – Independent Case Study:

EWI Installation Costs:

Installation costs of a project vary quite considerably as a result of the size of the building, access to the site and the particular finish required i.e. including pillared porch with granite effect quoin stones, granite window cills etc.  Typical installation costs for a 3 bedroom mid terrace house based on a standard coloured sand and cement finish would be as follows:

Installation costs for EWI i.e. front and rear walls – approximately 50m2:                €5,300.00
Grant Available based on successful application to SEAI:                                        €4,000.00
Net cost to client:                                                                                                        €1,300.00

Typical EWI installation costs include all labour and materials and setup cost such as scaffolding. Access to a local water point and electricity supply to be provided by Client.

Payment for EWI installation is based on three instalments:
1st instalment               -           40% upon acceptance of quotation
2nd instalment              -           40% upon completion of fixing of insulation on site
3rd instalment               -           20% upon completion of project