Peeling paint is not a good thing, especially on the exterior of a house. It exposes the substrate, ie. wood or metal, underneath to the elements.
Proper prep work is essential to ensuring a long-lasting paint job.
Use of top-line paint is essential to a long-lasting paint job.
Why would paint peel in the first place?
In Toronto, we have extremes of temperature between the winter and summer, this causes the substrate to expand and contract.
Metal especially expands and contracts with seasonal weather changes, therefore the paint system (both primer and top coat) must flex with the substrate during these expansions and contractions.
Acrylic Latex paint has flexibility built into it and therefore is generally the best paint to use on most exterior surfaces. Alkyd paint dries very hard, however, it doesn’t have a great deal of flexibility and can crack during the expansion and contraction cycles.
Moisture in the substrate.
Wood, being a tree, sucks up moisture and can retain moisture for long period of time. However, when the moisture is released this can cause a coating on the surface of the wood to peel and/or crack. Therefore, it’s imperative that the wood is dry before painting and that the wood is properly sealed from moisture penetration.
How do we know if the wood is dry enough to paint? We use a moisture meter which measures the moisture content in the wood, any reading less than 12% is in the safe zone. A few days of rain can really increase the moisture content of the wood, so it’s important to ensure the wood has adequate time to dry after the rain.
No primer has been used, or the wrong primer has been used.
Some primers perform better than others. We use high quality primers and different primers based on the surface we are applying the primer to. Wood requires a different primer than metal. Older homes with many layers of alkyd paint require a different primer than a newer home with only a few layers of paint.
If you’d like us to come and see why your paint is peeling why don’t you book a quote? We’d be happy to transform your home with lasting beauty!