Posts Tagged ‘oil based’

Loose Wallpaper; Wall Layers Delaminating

November 15, 2018


Look closely between the seam of the wallpaper in the top photo. You can see little crumbly things. In the second photo, the issue is even more pronounced.

This is in the upstairs bathroom of a 1950 house in central Houston. Over time, compounded by humidity, poor air circulation, poor air conditioning / heating, and possible influences from the outdoors, various layers inside the wall have let loose of one another.

What are these layers? Originally the walls were probably painted with oil-based paint. Over the years, layers of latex paint, gloss paint, joint compound, and etc. were piled on, probably without proper prep between coats.

Some of these materials are not compatible with one another, and, over time and with stressers like humidity, they can let go of one another.

If just the wallpaper has come loose, as in the second photo, it can be pasted and readhered. But when the wall itself is coming apart, there is no fix, other than to scrap everything down to the original drywall (huge mess) or go over everything with 1/4″ drywall.

In this case, the homeowner had me repaste the few loose areas of paper, and then chose to live with the other visible cracks, chalking it up to an old house full of character and quirks.

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Ink Spots Bleed Through Wallpaper

July 8, 2018


Well, this has been a month of issues with stains on walls! I was smoothing these textured walls with joint compound, and noticed some red splotches on the paint. I studied them, but decided they were paint, which is stable and not a problem. But a little after I had skimmed over the spots, I looked again and noticed that the red color had bled through.

Evidently it was ink, or lipstick, or child’s crayon, or some other such substance. Along with rust, blood, water, oil, mold and mildew, and a few others, these materials will bleed through paint and wallpaper. It might not happen right away, but eventually you will notice stains on the paper.

These stains can be sealed with a stain-blocker. I like oil-based KILZ Original, but the shellac-based BIN primer is good, too. Water-borne sealers may be environmentally-friendly, but I don’t trust them to work as well.

But in this case, I preferred to just get rid of the questionable areas. I took a knife and dug out the part of the wall that had the red spots. Those are the chips I am holding in my hand. Then I skim-floated over the area to smooth it, and proceeded with my wall prep and wallpaper installation.

No more red spots showed their faces. 🙂

Wallpaper on a Window Valance

June 12, 2018


I hung a beautiful grasscloth in the West U. living room of this empty-nester couple a month ago. They were putting the room back together, including hanging the curtains. This window valance had been covered with padded fabric which matched the drapes. Since the drapes are being changed, the valance no longer worked. The couple thought that the valance would look better covered in the same material as the walls.

So … I brought the valance home, along with some left over wallpaper scraps, and covered it.

The photo is deceptive – the thing is about 7′-8′ long. At first I thought I could take it to work with me and do it while I was waiting for primer to dry, for instance. But it’s way too big and loppy to haul into someone else’s home and, would, of course, take more time than anticipated.

So it sat in my garage for a couple of weeks, until I finally found a spare moment (three hours, actually) to pull out my tools, set up my table, get out the measuring tape, and slap some paste on that puppy.

The homeowner had removed the upholstery and the padding, and hammered the staples down as flat as possible. Then I sealed the wood with oil-based KILZ Original stain blocker, to prevent any wood sap from bleeding through the wallpaper. Since wallpaper paste won’t stick to most oil-based products I followed that with a coat of wallpaper primer (Ultra Prime, Pro 977 by Roman’s). On the driveway under the June Houston sun, that didn’t take long to dry. 🙂

Then some careful measuring to get panels of equal width, pasting, and applying the grasscloth to the wooden frame. I used a special “super glue for wallpaper” (clear silicone caulk 🙂 ) for the edges, to be sure the grasscloth would be able to grip on to the uneven and rough wooden surfaces.

I was pleased with the way it turned out. And I know the homeowners will be happy to get the valance up on the wall, their curtains up, and their room put back together and ready to enjoy.

Mildew, Bleach, KILZ

June 7, 2018


Whooah! I stripped off wallpaper from this wall around a window in a home that had some water damage from Hurricane Harvey, to find this black powdery stuff – mildew. You don’t want to put wallpaper over a wall that has mildew, because the black stuff will continue to grow. And because it’s chalky / powdery, it the wallpaper will not stick to it. And it will also work its way through the wallpaper and create a stain on the surface.

I use bleach to kill the mildew and remove it from the wall. Once dry, I use KILZ Original oil-based stain blocker to seal the surface. In this case, I also skim-coated the wall, to make it nice and smooth. I will follow that with a coat of Gardz, a penetrating sealer that is also a good product to hang wallpaper on.

Repairing Water Stains from Flooding During Hurricane Harvey

May 2, 2018


This home in Bellaire (Houston) received damage from flooding during Hurricane Harvey in August 2017. Water stains appeared on a small area of the wallpaper just above the baseboard in this powder room. Luckily, the homeowners had saved the paper left over from the original install, so I had material to use for the repair.

Certain substances, like grease, blood, smoke, rust, ink, tobacco, and water stains will bleed through wallpaper (and also paint and other materials, too). To prevent this, the discolorations must be treated with a stain-blocking sealer. Many of these are shellac-based, such as BIN, made by Zinsser, but there are others. I prefer oil-based KILZ Original (2nd photo).

I could have just cut some wallpaper and slapped it on top of the stain. But I wanted to be sure these flood survivors wouldn’t have to look at water stains again. So I used KILZ to cover the stains (3rd photo).

The next week, I came back to do the patch. Using my self-healing craft cutting mat with angles and measurements to trim on, along with a straightedge and razor blade, I cut appliqués to paste on top of the stained paper.

It wasn’t quite as simple as it sounds, because the wallpaper had to be hand-trimmed (use a razor blade to trim off the unprinted selvedge edge). And pasting the paper causes it to absorb moisture and expand, which can throw off the pattern match. So I was dealing with factors relative to what the other guy did and the products he used, compared to my own techniques and products / paste.

It took two tries, but with careful trimming and a little touch-up paint, the job turned out great (last photo).

I also used paint to cover some stains at the top of the baseboard, and also re-pasted some loose areas in other parts of the room (no picture).

Stripping Wallpaper

December 26, 2016

Digital Image

Digital Image


Today I repapered a powder room that I have done at least twice before, over 20 years or so. The existing paper stripped off easily, in part because it was a pre-pasted paper-backed solid-vinyl paper, and also because of the primer I used to seal the walls – oil-based KILZ Original. The primer protected the walls and kept them intact, and there was no damage to the walls whatsoever.

The photo shows all steps of removing this kind of wallpaper. The printed top vinyl / plastic layer is pulled off. With this kind of paper, the top layer usually separates and pulls off easily and in large pieces. This leaves a paper backing still stuck to the wall. This is the light tan area you see in the photo. I use a wet sponge to soak this layer. When it gets good and wet, it turns dark tan, as seen in the photo.

The next step is to remove this backing. Once it’s good and wet, the paste holding it to the wall will reactivate, and the wallpaper will peel away from the wall easily and in large pieces. Sometimes it might be necessary to scrape the paper off the wall, which can be done with a not-too-sharp 3″ stiff putty knife, taking care not to gouge into the wall surface.

Covering Rust – Rust Bleeds Through Wallpaper

April 13, 2016

Digital Image

Digital Image


The dark red stain on the edge of that outside corner is rust. It is coming from the metal bead used to define the corner when the house was built. The only problem is, in a steamy bathroom with poor ventilation, these metal beads are sometimes prone to rust.

And rust bleeds through wallpaper.

Before I started hanging the new, pastel-colored wallpaper, I had to block off the rust stains. Nothing tackles this job better than the original oil-based KILZ Original. I’ve taken a small brush and applied KILZ to a half-inch wide strip that runs the height of the wall. It dries in about an hour, so paper can be hung fairly quickly.

Other substances can stain wallpaper, so KILZ is good to have on hand. KILZ also seals off water stains, oil and tar, ink and markers, and odors, like smoke from cigarettes or fire.

Why Is This Paint Peeling Off The Woodwork?!

August 12, 2014

Digital ImageSee the paint peeling off the woodwork? This happened when the hose from my Shop Vac brushed against the molding, and also when I removed blue painter’s tape that was holding plastic sheeting across the doorway.

A couple of things are going on. First of all, this is latex paint put over old oil based paint, which is not a good combination.

Second, and most important, the painter failed to properly prep the woodwork before painting. This woodwork in this 1950’s home was originally painted with oil-based enamel (wonderful stuff, IMO). But it is glossy and hard, and new paint will not stick to it. So it is essential that the old paint be either sanded (and then wiped clean of dust), or wiped with a chemical deglosser, to remove the sheen, so the new paint has something to grab and hold on to.

Latex paint is also not a good choice, IMO, because it’s not sticky enough, and because it is too rubbery and plasticy. An acrylic paint is preferable, and brushes can still be washed up with soap and water. Of course, I’m something of an old-school gal, and I think that when painting woodwork, oil-based the best way to go. Even then, you still MUST properly prep the surface, meaning sanding and deglossing and wiping off the dust.