Fixing squeaky floors

If you can get underneath, you have an advantage

Dear Gene: Our house has beat-up hardwood floors covered by wall-to-wall carpet. The floors squeak badly. Is there any way to fix this problem from the basement, without removing the carpeting? — M.S.
Squeaking floors can be very tricky to repair, but if you can work from underneath the floor, you have an advantage. The squeaks, of course, are caused by boards rubbing against each other, or rubbing against nails, because they are not securely fastened. A repair method that sometimes works is to check the underside of the floor for gaps between the subfloor and floor joists. The gaps must be closed to prevent movement. To stabilize the floor, use thin wood shims, which can be bought in packs at many home centers. Have someone walk on the floor while you check underneath for places that squeak. When you pinpoint a squeak and find a gap, spread some glue on both sides of a shim and tap it firmly into the gap. Use plenty of shims to completely close gaps. Special screw-on brackets are also available for use from underneath on squeaky floors. One leg of the right-angle bracket is screwed to the joist; the other is screwed into the floor to pull loose flooring together. Four of these brackets, with screws, are available from Improvements for about $15 (, item 105064). It is also possible to stop some squeaks from above, right through carpeting. This requires special screws that break off when properly inserted so the heads are not visible, plus a special installation tool. A kit with 50 screws, the tool, and instructions is available for about $30 from Improvements (item 110189).
Dear Gene: Several of our double-pane thermal windows have developed a translucent haze between the panes. These are good-quality windows, about 20 years old. The manufacturer just said, “This sometimes happens,” and we had to pay a stiff price to get the glass replaced. What causes this, and is there a way to prevent it? — C.P.
Fogging inside thermal windows generally means that the seal between the panes of glass is leaking and admitting moisture, dirt, and air to the cavity. This is fairly common with older windows, but seals have been improved in recent years, and many newer windows have lifetime warranties against leaking seals. If a seal leaks on a warranted window, you should be able to get replacement glass free but will either have to install it yourself or pay someone to do it because the warranties seldom cover labor. Unfortunately, I know of no way to prevent seals from leaking or any way to repair them except to replace the glass. Buyers of new thermal windows should choose a well-established brand, preferably with a lifetime warranty on seals, and obtain and save a written copy of the warranty.
Dear Gene: Our wood-frame house was built in 1938 with no insulation in the exterior walls and about 3 inches of blown-in insulation in the attic crawl space. I am concerned that if I have insulation blown into the walls I will have moisture damage because the walls have no vapor barrier. What is your advice about blowing insulation into the walls? — B.W.
I think your first concern should be the attic, which has far less insulation than is recommended for any climate area of the nation. Your current attic insulation probably has an R-value of about 10, less than one-third of the R value recommended for ceilings even in Florida or California. Although it isn’t always possible to meet recommended levels of insulation in an existing house, you should try to double or triple the amount of insulation you now have. If you also want to have insulation blown into the walls, the usual way to provide a vapor barrier is to coat the interior walls with a moisture-blocking paint or wall covering. One method is to apply a coat of shellac-based primer-sealer such as Zinsser’s B-I-N (, then finish with either an alkyd or acrylic paint. Vinyl wall coverings are sometimes also used as vapor barriers.
Gene Austin says he became a do-it-yourselfer by necessity some 40 years ago when he bought his first house, a fixer-upper that needed a lot of work. Over the last 20 years, he has helped thousands of other weekend warriors through his home-improvement column.
Send questions and comments to Gene Austin at or 1730 Blue Bell Pike, Blue Bell, PA 19422. Distributed by Knight-Ridder Newspapers.

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