Are Kömmerling PVC windows a good choice for your home?

Kömmerling PVC window profiles Kömmerling is a German brand of PVC profiles used to manufacture windows and doors. The profiles form the outer frame and, in an opening window, the sash that holds the glass. Kömmerling produces different systems, so the brand name alone does not identify the precise construction of a finished window. The profiles contain internal chambers that form part of their insulating design. They also provide space for components such as reinforcement and the parts needed to hold the glass and seals. A manufacturer combines the chosen profile system with glazing, hardware and an opening arrangement suited to the size and purpose of each window. This flexibility is useful when replacing several windows across a property. A fixed living room window, an opening bedroom window and a smaller bathroom window can share a consistent appearance while being specified for different uses. Thermal performance and glazing The frame helps limit heat loss, but the glass makes up a large part of most windows. The glazing, profile, seals and window dimensions all affect the thermal performance of the finished product. The figure to check on a quotation is the Uw value of the complete window. A figure marked Uf describes the frame, while Uw describes the window as a whole. Comparing complete window values for similar sizes and glazing arrangements is more useful than comparing profile descriptions alone. Glazing should be selected around the needs of the room. A cold bedroom, a living room facing a busy street and a room exposed to strong sunlight may call for different glass specifications. Thermal insulation, noise reduction and control of sunlight are related to different properties of the glass. One glazing choice should not be assumed to solve all three problems. UV protection is also different from a U value. A window’s U value describes heat transfer. If fading furniture, curtains or flooring is a concern, the appropriate glass specification needs to be discussed separately. Steel reinforcement and frame stability Steel reinforcement can be incorporated inside PVC frames and opening sashes. Its purpose is to help support the finished window and keep it stable in use. The reinforcement specified should suit the dimensions and design of each window. An opening sash places different demands on the frame from a fixed pane. It carries hinges and locking hardware and needs to close against its seals repeatedly. Larger windows and heavier glazed sections need particular attention during specification and manufacture. The appearance of a frame cannot tell you everything about its construction. When reviewing a quotation for large PVC windows, it is sensible to check the proposed reinforcement alongside the profile system, glazing and opening arrangement. Seals, hardware and everyday use Seals help the opening sash close against the frame. Together with correct adjustment and fitting, they help limit unwanted draughts and rain entering around the opening section. Hardware affects how smoothly the window operates and how securely it closes. The best opening arrangement depends on how a room is used. Consider whether furniture will restrict access to a handle, whether the window needs to provide convenient ventilation and how the glass will be cleaned. These practical details should be settled before manufacturing starts. For a whole house replacement, it is also worth considering how the opening sections will look from outside. Windows with similar frame lines and carefully planned opening positions can give the property a more consistent appearance. Appearance and maintenance PVC frames are straightforward to look after. Regular cleaning of the frames, glass and accessible seals is usually the main routine maintenance. The moving hardware should also be checked and operated as intended. Kömmerling systems can be used to make windows in different styles and finishes. The choice should suit the building as well as the homeowner’s preference. Where only some windows are being replaced, the colour, frame proportions and opening layout should be considered alongside the windows that will remain. PVC will not be the right material for every building. A property with a particular architectural character may call for closer attention to frame appearance, and some projects may be better suited to timber or aluminium. The material should be chosen after looking at the property and the result you want to achieve. The importance of a proper survey and installation A survey checks the actual opening before the replacement window is made. The installer needs to assess its dimensions, the condition around the existing frame, how the new window will be positioned and how the joint with the wall will be sealed. During installation, the frame needs to be positioned and fixed correctly. The opening sections should operate smoothly, close properly and make contact with their seals. The perimeter also needs careful attention so gaps around the window do not undermine its performance. This is one of the main limitations of judging a window by its profile alone. A well specified Kömmerling PVC window still depends on accurate measurement, sound manufacture and careful fitting. Windows Store Ltd can survey the openings and provide a specification for the complete windows and their installation.