You are better off removing the old. You can inspect the decking and the shingles will lay flater.
No, it is not recommended to put new grout over old grout for a tile renovation project. It is best to remove the old grout completely before applying new grout to ensure a proper and long-lasting bond.
You can but it is not recommended. The old roofing sheets will promote corrosion under the new sheets. Far better to remove the old corrugated roofing first.
They were put in the Valley of the Kings.
As long as the only linoleum is not peeling or loose go ahead and put the new one right on top of it this way you avoid the risk of asbestos and all the mess of riping up the old floor.
Yes, you can put new caulk over existing caulk as long as the old caulk is clean and in good condition. It is important to ensure that the surfaces are dry and free of debris before applying the new caulk.
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The new tile can be glued to the old ones. If possible, stagger the new ones so that they attach to two tiles. If you have to cut the first row in half, you can use the piece you cut off on the other side of the room.
The steady movement of the glacier over the centuries carved a valley through the landscape.
You can install a custom fireplace screen over an existing fireplace. It is not recommended to put a new screen over an old screen. The main thing you need when planning on a new screen is the exact measurements of the fireplace.
Yes, you can put pavers over concrete for a new patio design.
With composition shingles, no felt is necessary between shingle layers. When the exposure of the shingles is the same as the old exposure, the bottom edge of the old shingles is used as a guide for the upper edge of the new shingles in placement. This ability to place the shingles would be lost if covered with felt.
Yes, you can. They will start over and make a new nest. If you leave it in they will put new materials over the old nest to make it fresh.