Choose PVC windows and doors correctly

Require those who made the offer to pay a visit to the production hall where the windows are made, thus you will be able to observe: the method for the completion of your windows;

reinforcement – this must have at least 1,5 mm and to be on all the sides;
deburring- if this is done properly, it must have a thickness of 3-3,5 mm for the white profile and 0,2-0,3 mm for the colored profile
gasket – this must be made of a single piece, stuck at the upper side, in the middle;
adjuster/sash joints and frame adjusters;
drilling and venting holes – this must be according to the technical catalogue of the profile producers.

When comparing 2 or more offers of PVC carpentry, you must consider the aspects below:

the thermal transfer coefficient must be the same;
the profile color must be the same;
the surface must be the same;
the openings must be the same;
the profile origin;
type of glass;
hardware

Ask for a written offer at the company you will sign the contract with:

The price for the windows and doors is done according to the carpentry panel;
Ask for the energetic certificate on the window, as a whole- document certifying the phonic and thermal transfer coefficients, the surface, meters, glass surface;
Ask for the guarantee certificate of the purchased products.