Who are Certass? And how can they help you?

Certass Limited, The Specialist In Installer Certification For The Building Fabric Refurbishment Industry.

Being a UKAS accredited certification body, Certass Limited operates a Competent Person Scheme. The scheme is under Local Government (DCLG) license, Department of Communities and the Energy Efficient Measures scheme; PAS2030.


In addition, Certass manage the Thermal Ratings Register; a product certification scheme. Through this scheme, we ensure the thermal compliance of replacement windows and doors.

In order to get the Certass certification scheme membership, member companies should comply with the standards of Trustmark, PAS2030, EN17065 and the specific DCLG license requirements. Hence, in order to ensure its members meet the required standards, Certass assesses them both financially and technically.


Each of the members are assessed every year. This is through submission of a sample of work by each one of them, so that Certass inspects scheme compliance of the members. The homeowner where appropriate, then receives a Building Regulation Compliance Certificate from Certass and the local authority is notified by them.




Within the building refurbishment industry, three separate certification schemes are operated by Certass. It is through Government license or sub-license that all of them operates.

The two key areas; glazing and insulation, are what our three licensed schemes fall in to, for the successful operation of a Competent Person Scheme. All the other trades fall under the Green Deal and TrustMark licenses. Apart from that, there are other certification schemes which are licensed and run directly by Certass. For more information, our Homepage provides details of the scheme scopes for installers.


This is an alternative to submitting a building notice, or an alternative to the use of an approved Local Authority inspector, which is set up by the government in order to improve home and building works.

In order to ensure qualification in carrying out installation work as per the current building regulations, all Certass registered contractors are vetted. After completing an installation, a Building Regulation Compliance and Certificate is issued by Certass for the work done.

At a cost more than 250 pounds, the notification and approval of the work completed, can as well be sought directly from the department of Local Authority’s Building Control.


According to the 2010 building regulation amendments, they are law established mandatory and functional requirements, which are meant to protect the health, welfare, safety and the convenience of building users and those affected by building matters or any other matters that come as a result of the effects from building. Also, the thermal performance of both the building and the building works are defined under the building regulations.

The quality of the installation or aesthetics are not a matter of concern in the building regulations. This applies if the thermal performance, health, safety, welfare and convenience of the users of the building, and the public in general are not affected. Hence, poor installation services such as uneven finishing, and large trims are not covered by the building regulations. They are installer issues that should be dealt with between the owner of the building and the contractor.

For more information visit the Certass website


Casement Windows

Casements are a specific type of window which are directly attached to its frame using one or a few hinges. The term casement window is used to describe the specific position of hinges located on the side. Awning windows are windows which are hinged at the top. On the other hand, windows which have been hinged at the bottom are referred to as hoppers. They can be used either singularly or in pairs using a common frame which are usually hinged on the outer corners. A casement stay is commonly used to hold casement windows open.


Casement windows were very popular in the United Kingdom before the discovery of the sash window. It was the most common house window used by the country. In the past, casement windows were made up of leaded glass. They were glass panes which were kept in place by strips of lead. The casement windows were also hinged on their side and they open in an inward motion. There were functional exterior shutters which covered them and these shutters open in an outward motion. To this day, a wide variety of casement windows remain popular in most European nations. The two most notable countries who widely make use of casement windows are Sweden and Denmark.


Casement windows can be opened using a variety of methods. The most common ones include a cam handle, lever or crank. The cam handle is specifically placed in an area with hand height. It is also usually placed at the bottom and is used as a window lock. If the window is required to be opened outward, a stay, crank or friction hinge is needed. They effectively hold the window in the proper position amidst any strong winds or extreme weather conditions. The glass panes are usually put in a rabbeted frame which is sealed using a grazing compound or beveled putty. Its main purpose is to keep the glass securely in place.

Get your bespoke Casement Windows at www.pembrokenash.co.uk