Uncle came to visit and was horrified by our cold window sills, corrected everything in one day, from the joints no longer blows.

No one is immune from cold window sills: neither the owners of plastic windows, nor the owners of wooden window frames. This can happen to those who have recently installed new plastic windows. Today I will tell you how to understand that the window sill should be insulated and how to insulate the cold window sill.



To determine whether it is necessary to insulate the windowsill, it is quite simple. If in cool time the air temperature in the room decreases or from the window opening frankly through. Condensation in autumn and frost patterns in winter suggest that the window misses the cold, possibly incorrectly installed.

To determine where it blows, light a candle or hold a lighter along the seams of the ha junction of the window frame and window sill. You can wet your hand and bring it to the windowsill in the same way. In a place where the window sill lets in cold air, you will instantly feel the cold.



You can insulate the windowsill inside and outside. If the windows have been installed recently, it makes sense to call the company that installed the windows. The company is obliged to correct the problem by guarantee. If the warranty period has expired. You can insulate the windowsill yourself.

Plastic window sills can be insulated without dismantling. It is enough to calculate the through place and foam the window sill from below with mounting foam. For insulation, you can use silicone sealant, which is most often processed seams.



What to insulate the window sill is suitable mineral wool, foam and other materials. It is best to use foam, since it has the property of expanding and filling large gaps. The sealant can neutralize small, barely noticeable cracks. And mineral wool not only retains heat inside the room, but also has good sound insulation.

The foam is placed under the window sill and foamed with mounting foam. You can also use a putty. Styrofoam retains heat well and is a budget-friendly way to insulate windows. If the windowsill needs to be removed, you will need some tools: a spray gun with water, a chisel, a knife, a hammer. It is necessary to knock down the plaster in the openings and at the base of the wall, where it contacts the window sill. The old mounting foam is cut off from the windowsill.



Pay attention to the fact that you do not have to dismantle the window sill if the cold air blows under it. When the windowsill was removed, it is necessary to apply a thick layer of mounting foam on the opening and carefully lay out the window sill on top, pressing it tightly on the level to the opening. It will not be superfluous to foam places with slopes, through which a draft also often passes. The slopes will have to be re-treated with putty, and at the end you will walk with a sealant at the seams.



Insulation of the window sill outside Installation foam sags with time, especially in the cold season. If you remove the window sill from the outside of the window, you can notice that there is almost no foam under it. Thermal insulation outside plays an important role in the insulation of the window sill. Otherwise, no matter how you try to insulate everything inside, you will still be haunted by a draft.

When the tightness of the structure is broken, the thermal insulation suffers. When my husband and I installed plastic windows, it turned out that it was impossible to be on the balcony. That's because the neighbor downstairs didn't glaze the balcony, and now there's a draft under the frames. But my uncle showed me a simple way to insulate.



Remove the tide, treat it with sandpaper. Then we wash away the dirt and let it dry. Excess garbage from the outside of the window sill is swept away by a broom or vacuum cleaner. Then we need to foam all the voids under the profile and generously apply foam on the windowsill outside. Now carefully apply the tide and press to the foam. So the apartment not only became warm, but also during the rain the tide does not rattle and does not irritate. Now there is no difference in temperature day and night in the room. Finally!