Hi everybody. I am currently collecting quotes for painting the outside of my dormer bungalow. The house was last painted a long time ago and some of the old paint is flaking off the two gable ends, which bear the brunt of the weather (see photo for the worst wall). I am fairly sure that the render itself is sound but they are solid walls and damp is getting onto one or two of the inside walls. I am thinking 1) scrape off flaky paint, 2) apply waterproof coating and 3) apply top coats of paint (Sandtex or similar). Does that sound reasonable? Any advice gratefully received. Thank you.
Waterproofing coat before painting?
- Thread starter gardenque
- Start date
Hi everybody. I am currently collecting quotes for painting the outside of my dormer bungalow. The house was last painted a long time ago and some of the old paint is flaking off the two gable ends, which bear the brunt of the weather (see photo for the worst wall). I am fairly sure that the render itself is sound but they are solid walls and damp is getting onto one or two of the inside walls. I am thinking 1) scrape off flaky paint, 2) apply waterproof coating and 3) apply top coats of paint (Sandtex or similar). Does that sound reasonable? Any advice gratefully received. Thank you.
Thanks guys. My information is that the render is fairly sound and it's just the fact that the house hasn't been painted for so long that is causing the flaking and water ingress. I've read a lot about paint made by Emperor, who say their products last for 25 years. Sounds too good to be true to me but it apparently keeps water out and still allows the walls to breathe. No idea how that would work.
There are so many people recommending Sandtex Trade that I'm tempted to just go with that and forget about an intermediate waterproof coating. It's difficult to know how much of the information online is just company blurb. I'm hoping to get a more balanced opinion on this forum by people who have been actually doing the job and aren't affiliated to any particular product or company - recommendations from the horse's mouth, so to speak.
There are so many people recommending Sandtex Trade that I'm tempted to just go with that and forget about an intermediate waterproof coating. It's difficult to know how much of the information online is just company blurb. I'm hoping to get a more balanced opinion on this forum by people who have been actually doing the job and aren't affiliated to any particular product or company - recommendations from the horse's mouth, so to speak.
The render is the waterproof layer, and if it's not performing as such then it's failed and should be renewed.
Generally, paint won't adhere to common masonry water repellent systems such as silicones, silane and siloxanes, and even if it did, it will likely compromise the very hydrophobicity and porosity that make it water repellant in the first place.
Generally, paint won't adhere to common masonry water repellent systems such as silicones, silane and siloxanes, and even if it did, it will likely compromise the very hydrophobicity and porosity that make it water repellant in the first place.
Spain?
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