Hi Bobbi
I've recently purchased a 1930s bungalow which was renovated and extended in 1967.
I had a small roof leak in the extention and the celing boards were swelling a little at the joins.
I had a further minor leak in the attic, and noticed an unusual brittle coating that had been sprayed over the underside of the roof and plasterboard linings.... I then started to worry!
I was worried that the entire extention was built with ACM (asbestos containing materials)along with the alterations to the main house during this period which was at the height of asbestos use.
My suspicions arose due to the fact the previous owner seemed to have 'encapsulated' or blocked in / covered over almost every surface in the house rather than ripping out historic materials originating from the 1967 upgrade..
Encapsulating is often the preffered way of dealing with ACM, as removal can cost tens of thousands of pounds.
I fell down a rabbit hole googling and scouring asbestos forums and convinced myself that every ceiling and wall in the house contained asbestos, and was worried sick about the health of my partner and toddler.
Suspected asbestos ;
1) heavy textured artex type wall coating in vestibule - the wall contained an open gash with asbestos like fibres visible.
2) one celing had evidence of heavy sanding, I was convinced it had previously been artexed. Every other celing in the house was papered, leading me to worry that all the celings contained asbestos and encapsulated by the previous owner..
3) I was convinced all the celings and walls throughout the extention were made from asbestos insulating board (AIB) as these were sometimes used instead of plasterboard for their insulating and fireproofing properties..
4) I was convinced without a doubt that the old heating cupboard was lined with asbestos insulating board... as the circumstances seemed ' textbook'
5) I was convinced without a doubt that the brittle sprayed popcorn coating on the attic wall and celing plasterboards were asbestos... used for insulating and fireproofing property to the underside of the roof...
I had a specialist come out - everything was tested, everything came back NEGATIVE.
The specialist suggested it's unusual to find asbestos in such domestic properties generally - but the most common being artex, which is white asbestos (1-5%)
There are figures out there that suggest that you would have to scrape and sand over 200,000 artex celings to reach your maximum lifetime safe asbeatos exposure from the stuff generally found domestically.
Please note that asbestos insulating boards (AIB) contain high levels (>50%) of the bad brown/ blue asbestos types
and pipe lagging insulation is some of the worst asbestos there is with mixtures of white/brown/blue with very high 90% content.
Hope this helps