Margam Window Fitters. Looking to buy new or replacement Margam Windows? Get a competitive price quote and cost inclusive of supply installation from Margam fitting company MPN Windows Port Talbot SA13. Margam UPVC Windows available in Tilt and Turn; Sash; Casemet; A-Rated; Double Glazed; Triple Glazed; MPN Windows local trusted recommended company Fensa Veka and trusted traders for Margam home improvements.