❄️ Ice dams on roof edges are not only aesthetically pleasing, but they also compromise the structural integrity of buildings. Here's why:

💧Water infiltration and damage to materials

When snow melts on the upper part of the roof and water runs down toward the eaves, it can freeze due to the colder temperatures in this area. The gradual accumulation of ice creates a dam, preventing water from draining normally. This stagnant water eventually seeps under the shingles or other roofing materials, resulting in:

✅ Degradation of the roof covering (lifting of shingles, rotting of plywood or OSB);

✅Infiltrations in the attic which can cause deterioration of the insulation and the formation of mold;

✅ Leaks in exterior walls that damage the cladding and encourage mold growth inside.

🏠 Structural overload and roof deformation

Ice dams add considerable weight to the roof structure, especially when ice accumulates in large quantities. This can cause:

✅ The bending of trusses or rafters under the effect of overload;

✅ Cracks in interior ceilings and walls due to structural movements;

✅ A sagging of the roof edge, which aggravates the problem of water accumulation.

☣️ Risks to the safety of occupants

The presence of ice dams can also create dangers for occupants and passers-by:

✅Risk of falling ice that could cause serious injuries;

✅ Deterioration of gutters and deformation of soffits, which may require costly repairs;

✅ Ice on walkways and stairs, increasing the risk of falls.

Prevention and solutions

🛠️ To prevent the formation of ice dams, it is essential to apply preventive measures:

✅ Improve the insulation and ventilation of the attic to avoid the creation of uneven temperature zones on the roof;

✅ Install a waterproofing membrane (drip membrane) under the shingles to prevent water infiltration;

✅ Regularly clear accumulated snow from the roof, especially in areas prone to dams;

✅ Have a specialist perform a ventilation balancing calculation for the attic.

🏠 Conclusion

Ice dams are more than just a visual nuisance: they can cause water infiltration, weaken the roof structure, and pose a safety risk. Effective management of insulation, ventilation, and drainage can prevent these problems and preserve the building's durability.

☎️ If you would like recommendations tailored to a specific building, we can help you develop a targeted intervention strategy.