As many as five individual mini-split units like this one can be installed indoors while using just one outdoor piece of equipment for cooling.

Courtesy of Rosie on the House

Each year, thousands of Arizona residents email or call Rosie Romero’s radio show with questions about everything from preventing fires in their chimneys to getting rid of tree roots invading their sewer systems. His goal is to provide answers that suit the specific lifestyle wherever someone lives in Arizona.

QUESTION: I have a three-car gameroom/garage at my house, and I want to partition off part of it and use a mini-split air conditioner to cool the gameroom area. I also have a separate single-car garage and I’d like to cool that off, too. Can I use one system to cool both rooms?

ANSWER: Yes, that’s possible. You can use one mini-split to cool five different areas. It sounds like you’re making great use of your garage space. Of course, you do need to insulate your garage door or doors to make your cooling system work properly. For any room changes that you might make in the garage, you may have to apply for a building permit from your city or county planning department.

Q: I let a waffle iron sit on a solid surface counter in my kitchen, and I now have a crack in my Corian countertop. The area involved is on a kitchen island and half the counter has dropped a fraction of an inch at the seam where Corian slabs were glued together. Can it be fixed?

A: This is not a do-it-yourself project, of course, because special saws may have to be used as well as tools that heat the countertop. You will probably need to call a contractor that installs and repairs Corian counters. It’s possible that a cut can be made in the countertop and then the pieces can be glued back together again.

Q: I have a few bags of Type S hydrated lime that were left over after a job was completed at my house. I’d like to use up the materials by sprinkling lime on some areas of crushed gravel on my lot. I want to keep the weeds from sprouting in the gravel. Will that work?

A: The lime probably won’t be very effective as a weed killer. You certainly won’t want to put the lime on or near your plants. You could use the lime in a dog run to help control odors.

Q: I have a problem with my air conditioning system that keeps shutting on and off constantly. Someone told me this could happen because my AC system is oversized for my house. But when the AC contractor paid a visit, he said my system was undersized by about a ton. I have a 12-ton unit for my 2,000-square-foot house. So now I’m confused.

A: A system that shuts on and off constantly could be due to several problems. It could involve settings in a thermostat that need adjusting or it could be due to the height of your ceilings or the type of windows in your home. Before deciding whether you need a smaller or larger AC, your contractor should do a heat-load calculation that takes into account various factors in your house. Then have the contractor run through the calculations with you. You probably want to get a second opinion as well.

Q: My house was built on a post-tension slab with a system of cables installed inside the concrete. Now I want to lay some Pergo flooring, but will any nails they use to install the carpet tack strip during this process be a problem and possibly damage the slab?

A: No, the nails they use are so small that they won’t damage the slab. Your plan is OK.

For more do-it-yourself tips, go to rosieonthehouse.com. Rosie Romero, an Arizona home-building and remodeling expert for 29 years, is the host of the syndicated Saturday morning Rosie on the House radio program, heard locally from 8-11 a.m. on KNST-AM (790) in Tucson and from 9-11 a.m. on KGVY-AM (1080) and -FM (100.7) in Green Valley. Call 888-767-4348.