I have never seen hardie board check so i question whether you have the actual james hardie product or another type of fiber cement siding.
How remove rust stain hardie board siding.
Big storms and windy days pick up dust and dirt that can cling to your home siding.
If it is under 1 4 i would simply apply caulk.
Yes i would try clr as well.
People prefer the natural look and feel of real wood and prefer wood sidings instead.
Adjust the nozzle so that the spray pattern is just slightly wider than the width of a single piece of hardiplank.
When properly cleaned and cared for james hardie siding should last for 30 50 years.
Stains are the most common sign that you have algae or mildew.
We have very high iron well water at our house.
We have hardie board siding and haven t experienced that.
Also when you go to repaint use a good quality paint.
When you invest in james hardie fiber cement siding or hardie board siding you have made an excellent decision.
The stains can be different colors which can often tell you what is causing the growth.
We used sherwin williams duration and although it was much more expensive than other outdoor paints it hasn t faded at all.
It has been at least 6 8 years ago that we painted.
Try and create as consistent a spray pattern as possible.
A pump up sprayer works well for applying fiber cement stain.
But it s important to make the right maintenance moves to ensure you don t accidentally do anything that voids the warranty.
After some watering of the lawn we had some very heavy iron stains on the white vinyl siding.
See the test results here.
Tommy cowett with growingreen shows how he removed iron stains on hard board siding.
Black stains are usually a sign of mildew algae mold or fungus.
Spray on the first coat of stain.
Whether you re removing dirt grease or mildew from your james hardie siding we ve gathered the tools solutions and methods you need to keep your siding clean as a whistle.
Fiber cement board is an ideal alternative to the usual wood siding and is considered by many to be more durable than real wood.
Brown stains on wood siding can signal that moisture is forming underneath the wood.
The problem with fiber cement board is mainly focused on the aesthetic nature of the material.
How you treat the checking board prior to painting depends on the width of the check.