There are many reasons a roof might sag, and not all of them are the fault of the roof or even the roof support structures.

Although a sagging roof is typically a sign of too much weight on the support beams, there can be other reasons. The sheathing or plywood on the roof could be too thin, or there could be too many shingles or other layers on the roof.

Likewise, poor ventilation in the attic could cause damage to the support beams. When the attic is not ventilated correctly, it causes condensation in the attic that gathers to make puddles of moisture. The constant accumulation of moisture. soon evaporates and weakens the roof supports. That moisture might also collect on the insulation and lead to mold growth. The same could be true if a small leak is causing t. e moisture buildup and subsequent evaporation.

You should have the professional roofers at Van Horn Construction inspect your attic, support beams, insulation and roof structure to determine the precise reason for sagging and to recommend a solution.

Improper Ventilation

Typically, modern attics are ventilated with a louvered soffit. If those soffit panels are covered with debris or insulation, the cure might be to remove whatever is covering the panels. If the support beams have been damaged, it may require additional support beams to lift and level the roof.

Leaking Roof

You should remove snow from the roof before it gets too heavy and damages the roof support structures. In addition to the weight, the snow will melt during the day and re-freeze when the sun goes down. Those sheets of ice under the snow can shift and damage shingles, flashing or caulking that is designed to keep melting snow from dripping down into the attic. A qualified roofing company can fix the leaks and shore up support structures to level out the roof.

Too Many Layers of Shingles or Too Thin Sheathing

Problems such as too many layers of old shingles or sheathing that is too thin can mean costly repairs, depending on the amount of damage covered by your homeowner’s insurance. Oftentimes, too many layers of old shingles will require all of the roofing materials to be removed and hauled away. Then, a vapor barrier is added to the roof and new shingles or another roofing material is installed. If sheathing or the plywood barrier is too thin, that will also need to be removed before reroofing.

Call Van Horn Construction to Inspect Your Roof

Give the professionals at Van Horn Construction a call at 612-756-7080 or use the convenient contact form for a free inspection and estimate of repairs.