I want to replace our old garage door with a modern model of the type sectional overhead door. Today's garage door has a rough opening with a height of 207 cm, which I want to increase to at least 225 cm in height. The interior ceiling height in the garage is about 260 cm.
After some investigation of the wall material above the garage door, I see that the 25 cm thick wall consists of about 15 cm solid concrete, which is then clad on the outside with about 8 cm hollow bricks. Then there is plaster on both the inside and outside. The solid concrete looks like it continues all the way up to the ceiling. Now I want to enlarge the opening and need to saw into the concrete. Can this be done oneself, or is it a professional job to order? Is it expensive, I wonder? Grateful for input.
After some investigation of the wall material above the garage door, I see that the 25 cm thick wall consists of about 15 cm solid concrete, which is then clad on the outside with about 8 cm hollow bricks. Then there is plaster on both the inside and outside. The solid concrete looks like it continues all the way up to the ceiling. Now I want to enlarge the opening and need to saw into the concrete. Can this be done oneself, or is it a professional job to order? Is it expensive, I wonder? Grateful for input.
I've looked at the pictures, I don't think it's hollow block, but rather porous gasbeteong, the kind that emits radon. You know. I believe it should be possible to adjust the height of the portal, a large angle grinder with a 300 coromant wheel (available for rent) can cut the porous stone a few centimeters above the new portal measurement. Nail a board exactly straight about 10mm (plaster) above the measurement, and follow the board with the angle grinder slightly tilted towards the middle of the casting, cut as deep as you dare, do the same on the inside, chip away the remaining material and cut off any reinforcement. Smooth the surface, concrete requires a special primer. It's a difficult, hard, and dusty job, the easiest way is to call a concrete saw specialist. But if you want to, can, and dare, then why not.