Keeping weight in check during refit

We are upgrading the interior on our 1974 56' Columbia. We removed over 375 lbs of old refrigeration, wet insulation, heavy building materials, etc., when we gutted the galley.
The cabin is a a raised cabin about 38" tall off deck. We installed a upright refrigeration at the centerline and are being mindful of choice of materials for counter top and built in drawers.

Her old windows are plastic frames with Lexan which are so badly deteriorated that you cannot see out of them in the sun.
Unfortunately, we are not finding a plastic replacement so will have to go to a glass window with metal frame. Should I be worried about the extra weight these windows will add to above deck level? There are 3 24" tall x 36" wide windows on each side and we were contemplating putting solid windows in on the hard dodger where there is strataglass bonded windows that are failing.

Is there a formula to use to keep things in check?
Or hire a local naval architect to helps us with this?

 

Is 375 lbs out accurate?
And how many pounds added, and where?

How much extra weight is there on the boat compared to when
it was first built and can it be removed?

Sadly, weight is not a boats friend.

 

Welcome to the forum Tammara,

If you're concerned about 1 weight growth and 2 the effects of stability of said weight growth, the simplest thing to do would be:

Locate a place on the boat that is easy to use a tape measure from.....this then becomes your datum line.

List every item that is being removed....and then its weight and its distance from this 'datum' line. Using +ve for above and -ve for below the line.
For weights being removed the value will be -ve....so if you remove 15kg, the value will be -15kg.
Once you have finished with every items being removed, you should have a table of 3 columns, but hen add another called VMoment, like so:

Items, weight, lever (distance), VMoment.

Then multiply the weight of each item by its lever to give you the moment, the vertical moment.
Once you have finished this add up (sum) all the weights at the bottom of that column for a total weight being removed. ..and call this row - Total Removed
Then do the same for the VMoment column..summate this.
Then the final 'distance' of all the weight removed is simply this VMoment/total weight.

So if you end up with a +ve value this means your vertical centre of gravity has risen. If the final value is -ve, it means the vertical centre of gravity has gone lower.

Then repeat this for every item that is being replaced and/or added.

Then finally, you will have a 3rd table...of items being removed and items being added, and repeat the same total weight and total VMoment.

You will quickly establish
1- you are added more weight than removing and
2 - if the vertical centre of gravity is going up (increasing) or going down (decreasing).

Once you have those values, you can make a better informed judgement.

Does this make sense?