Home renovation

I am currently 30 weeks preggy and is currently doing up my new house to move before the baby arrives. My FIL keeps telling my husband to not let me be at the new house at all especially when the contractors are installing things. Is this some pantang thing? May I know why? Realistically I am aware that there may be dusts/particles from drilling or chemicals from cleaning. But I diligently keep my mask on at all times and stay far away from the chemicals. We are not doing any major works or any hacking anyways. Also, I am a very DIY person so am I able to do up some stuffs on my own? Or cannot do at all? Thanks in advance!