HOW CAN I KEEP MILDEW
FROM GROWING ON MY NEW EXTERIOR PAINT
JOB? WHAT SHOULD I DO WHEN PLANNING THE
Mildew is a black or brown fungus that can grow on, and disfigure surfaces, including paint. While you may not be sure of getting a 100% mildew-free paint job, especially over a long period of time, there are some precautions that can help significantly in reducing or avoiding mildew growth on a paint job. Try to take as many of these into account as you can, when planning your paint job.
1. The Environment: while there isn't much you can do about this, keep these points in mind when deciding how much you want to do with factors you can control:
2. The Surface Being Painted:
3. The Paint Being Applied:
4. Applying the Paint:
WHAT IS THE BEST METHOD FOR
REMOVING A PIGMENTED STAIN FROM REDWOOD SIDING. WE ARE TRYING TO RESTORE
THE REDWOOD TO IT'S NATURAL STATE SO WE CAN PRESERVE IT WITH A CLEAR
There is no easy way to do this, as you might imagine. Consider these possibilities:
1. Chemical remover. Paint remover can be effective but tedious. Apply stripper in a heavy coat by natural bristle brush; protect skin, breathing and eyes with chemical resistant gloves, goggles, overalls, and an appropriate respirator. Do small areas at a time, at 10 square feet max. Allow to stay on for 20-30 minutes (time may vary due to weather conditions), then remove the softened stain with a 3" spackling blade, onto a disposable drop cloth. Protect plants, and keep children and pets away. Then move to another area. You'll probably have to sand the wood after it dries, to get the last of it off, and to get the color you want.
2. Sanding. Sand the wood with
the grain, using #100 - #120 grit production or aluminum oxide paper. A
3" or 4" belt sander will work well for bevel siding if have
the strength to hold the sander. Use care to sand the wood evenly and
not dig into it. Wear goggles, gloves and a quality dusk mask. Power
washing and sandblasting are other possibilities, but with redwood,
these would have to be done by a pro who is very experienced with doing
the procedure with redwood.
Be aware that you will probably have to reapply the clear material every year or two to maintain appearance.
I HAVE SEVERAL CONTRACTORS QUOTING ON PAINTING THE EXTERIOR OF MY HOME. HOWEVER, WHEN QUESTIONED ON WHAT IS THE BEST METHOD TO APPLY THE PAINT (HAND BRUSH OR SPRAYER), THEY ARE AS MANY OPINIONS AS THERE ARE CONTRACTORS. THE EXTERIOR SIDING IS HARDBOARD.
Basically, both spraying and brushing are fine, so long as the paint is put on at the proper spread rate (sq. ft./gallon). Spraying will provide a smoother appearance, and the painter has to be careful about getting a full coat onto areas that are next to areas that won't be painted, so careful masking must be done. Some people think sprayed paint will not adhere as well as if brushed, but we have not seen that, so long as the surface has been properly prepared.