Top Stucco Contractors In Toronto Blog! | Sealants and Stucco

A perception often encountered in the maintenance industry is that stucco cannot be installed or repaired in the winter months. Nothing could be further from the truth. Several maintenance issues should be addressed in the winter months. One of these issues is sealant application around windows, doors and other penetrations.  Sealing these areas will prevent additional heating costs and moisture intrusion issues.

Windows and doors are major culprits causing loss of heat, and loss of heat equals loss of money. Windows and doors inherently lose heat in the winter and reduce the effectiveness of air conditioning in the summer, because these wall penetrations do not have the insulating value of an exterior wall. This problem is compounded if sealant between penetrations and stucco has not been applied or if the sealant is old and delaminating.

​Proper sealants (urethane and specially formulated silicone sealants) should be applied. These specialized sealants are formulated to withstand ultraviolet exposure from the sun and moisture intrusion. UV exposure can reduce latex and most silicone to waste in a very short time.

Notice I use the term sealant instead of caulk. Painters use caulk to fill gaps, mainly for aesthetic reasons. A sealant is a barrier against weather intrusion and should be applied at all penetrations in the stucco.

There are plenty of temperature breaks in the winters of Toronto. Sealants can be applied in mild weather and will begin saving heat and money as soon as they are used. The coming spring will bring driving rain that will inevitably cause water intrusion, causing mould, mildew and structural damage. Sealant application is a vital but often underestimated solution to heat loss and moisture intrusion.

Weston Stucco can resolve the problem of a lack of sealant or improperly installed sealants. We will apply sealant using the most up-to-date installation techniques and the best products available.