Roof insulation company

This approach eliminates roof ventilation, so it is not generally recommended (check with local building authorities first). However, the high density of the insulation, together with the overall air seal, should adequately reduce the airflow to avoid condensation problems.
شركة عزل فوم بجازان

Take care to ensure that the air leak in the roof is closed from below. This is tricky because wiring and plumbing usually puncture the ceiling in a number of places. Moreover, the partition walls may not be completely closed at the top, allowing large volumes of air to flow through the inner walls to the ceiling.
شركة عزل خزانات بجازان

When interior walls are completely open to the ceiling, there is no easy solution unless you are ready to completely crack your inner walls with insulation and sealed along all ledges, niches, and other penetrations.

5.5 Ice Stopper
Glaciers are large blocks of ice that usually collect at the lower edge of a roof and in gutters. When melt snow (or rain) flows onto the surface, it meets this ice mass and retracts, sometimes under the shingles and then seeps into the attic.
شركة عزل اسطح بجازان

Ice blocking usually occurs when there is a large amount of snow on the surface. Snow itself, especially when deep, can act as insulation. If the attic temperature is above freezing, it warms the roof covering, melting the layer of snow directly in contact with the roof. Melted water flows down the surface until it meets the overhanging part.

If the air and the overhanging part are below freezing, the water freezes at the surface and ice blocking begins. In addition, dark wall siding, exposed to the south and heated by the sun, can cause convective currents to enter the eaves and roof area above, causing ice blocking.

5.5.1 Type of roof and glacier dams
Uninsulated attics do not usually have ice dams because the heat from the attic tends to melt snow as they descend and prevent a lot of build-up. An airtight, insulated attic results in a cool roof and generally won't have ice dams. Glacial embankments are more frequent if many valleys and windows may complicate the roof or there is a large bump. More complex types of roofs contain more snow because they are more likely to have a thermal bridge and air leakage areas.

5.5.2 Identify areas exposed to ice dams
One way to find areas exposed to ice dams is to look at the surface after the first heavy fall frosts or light snow. Notice where the snow melts first and find out what is below that spot. A common sight in such conditions is a horizontal melt line across the roof of a one-story house, where a short knee wall meets the roof. Other locations will be under a ceiling exhaust fan, plumbing hatch, under a skylight and above a leaky attic access hatch. The best way to prevent ice blocking is to seal all attic air leaks and be completely sealed.

Dark wall finishes can absorb the sun's heat and cause warm wall currents that may be responsible for ice dams. Sealing the associated ventilation openings may help reduce the problem. However, other vents may still be required to ensure the surface area is properly ventilated.

5.5.3 Dealing with limited attic space
Many attics, including those under low-sloping roofs, do not have sufficient space for adequate insulation at the edge of the attic floor. If roof insulation requires a baffle to keep a ventilation hole against the jacket, there may be about 100 mm (4 in) of space remaining for insulation. This limited level of insulation will allow the snow to melt directly over the bedrock and enhance the construction of ice dams.