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NT Radway Plastics has added the TF8i three-sided subframe to its range of PVC-U architectural products.The new subframe is designed to reduce installation time and cut costs for second fix windows, and to create square, rectangular or uniform window and door openings.A major feature of the subframe is that there is no need to make dummy templates, and it also closes the cavity. It is claimed to meet all current building standards and helps to achieve the current 'U' value at the reveal ...

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