The weight of the glue and planks can become too overwhelming for the lightweight concrete or gypsum and ultimately lead to disastrous results.
Too much glue hardwood to concretr.
They use too much adhesive thinking that more is better and the panels will be more secure this way.
When glue is used in conjunction with screws and nails the bond is strong enough to resist natural movement of the wood.
Floated subfloor system 1.
If there are voids the boards can flex into them and make creaking sounds as they rub together.
Although this may be true they run out of the adhesive halfway through the installation process and lose precious work hours.
This is a common mistake with newcomers to the do it yourself hardwood flooring field.
When you glue a hardwood floor to concrete the subfloor must be completely level.
Glued down floors are also not a good fit for below grade concrete or high moisture subfloors which are often found in basements.
Glue is a secondary method of attachment for bonding wood to concrete.
Installing engineered hardwood flooring over concrete too tight against a stationary object will not allow room for normal expansion and may cause a failure.
The adhesive manufacturer should have instructions regarding specific trowel requirements.