Prin ferestre se pierde peste 40% din caldura din casa. Alaturi de tipul de geam termoizolator, recomandat fiind tipul Low E, un rol important in izolatia termica a locuintei il are si tamplaria folosita la fabricarea ferestrei. La acest capitol, pe piata romaneasca se gasesc o multitudine de produse care, in timp, pot da posesorului multe „dureri de cap”. Alegerea sistemului de tamplarie se face in primul rand dupa material (PVC, aluminiu sau lemn stratificat).
– pentru un raport bun calitate/pret se va opta pentru tamplaria din PVC. Materialul e mai „cald” decat aluminiul. Daca aluminiul se preteaza mai bine pentru structuri inalte, acoperisuri sau vitrine foarte mari, PVC se potriveste pentru ferestrele locuintelor;
– daca totusi vreti tamplarie din aluminiu, verificati daca profilul dispune de „rupere termica”. Daca nu vedeti pe sectiunea unui profil un material despartitor din plastic, atunci tamplaria e dintr-o bucata. In acest caz fereastra nu va pastra caldura din locuinta. Chiar si in cazul in care exista camera de rupere de punte termica, dar are mai putin de 24 milimetri, tamplaria nu se potriveste conditiilor climatice de la noi;
– tamplaria din aluminiu, daca este de calitate, este mult mai scumpa decat cea din PVC;
– evitati tamplaria din aluminiu fabricata in tari care au clima mai blanda (Turcia, Grecia etc.) pentru ca diferentele termice de la noi sunt foarte mari de la un anotimp la altul;
– si profilele din PVC pot pierde caldura daca nu sunt fabricate cum trebuie. Pe sectiunea acestuia trebuie sa vedeti intre trei si patru camere interioare. Acestea impiedica aerul rece de la exterior sa ajunga pe interiorul tamplariei. Un numar mai mic de camere sau lipsa acestora tradeaza un profil de calitate indoielnica;
– adancimea unui profil trebuie sa fie de 62 mm ori mai mare. Unul mai mic nu va izola bine locuinta;
– intrebati vanzatorul daca in interiorul tamplariei va fi fixata o armatura din metal care sa impiedice deformarea in timp a ferestrei. Refuzati tamplaria fara armatura;
– feroneria (balamalele si inchizatorile) de calitate se cunoaste dupa garantia producatorului la numarul de inchideri /deschideri.
„Lucrurile foarte importante sunt croiala si executia tamplariei. Daca aceasta e taiata manual si rezulta o eroare de un milimetru sau un grad, inchiderea nu va fi buna, iar geamul nu va mai izola cum trebuie casa. Ii sfatuiesc pe cei care-si schimba ferestrele sa se intereseze inainte de a cumpara daca producatorul dispune de utilajele automate necesare, sau profilele sunt taiate manual”, ne-a spus economist Marin Crutescu, managerul general al firmei Corina Gealan.
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