Frequently Asked Questions & Answers
Q. What are the benefits of cavity wall insulation?
The main benefits gained from installing cavity wall insulation are, (1) heat retention, (2) money saving, (3) condensation reduction and it can assist in the elimination of rodent infestation in certain cases.
Q. What are the draw- backs?
None if installed to the Certificate Holders instructions.
Q. Does cavity wall insulation cause dampness?
Bonded bead cavity wall insulation will never allow dampness or moisture to penetrate the cavity in a properly constructed wall. This is due to the capillary action of the bead allowing gravity to draw any moisture present down the inner surface of the outer leaf to drain away at foundation level. The honeycombed nature of the bead once bonded will not allow dampness to travel across the cavity.
Q. Would the glue or the bead cause any health problems?
In no way will either the adhesive or the polystyrene bead cause health problems. Both materials have been thoroughly tested and offer no threat to adult or child. (or pets)
Q. Is there a fire risk?
There is insufficient air in the cavity to sustain a fire provided the cavity is capped as required.
Q. Does the insulation affect the structure of the house?
No, the installation or insulation has no affect on the integrity of the construction.
Q. Does the insulation cure all types of damp?
No, it will not cure rising damp. If this is present the customer must be informed and specialists should be brought in. If it is found while the survey is being carried out, a Warning Notice should be issued immediately. If a damp area is found to be simply condensation, then cavity wall insulation will help rectify the problem (not completely cure, but make a significant difference.) Dirty wall ties or something bridging the cavity can cause areas of spot damp. The problem should be ascertained and rectified before installation work is carried out.
Q. Will the insulation block the under floor vents?
No, all the vents currently in use will be assessed, and if they do not have a sleeve in place, we will remove them, sleeve them and replace the vent covers where necessary. The vents must be kept clear at all times to maintain a steady air flow to the required areas.
Q. Will the insulation go into my neighbours` property while being installed?
No, a vertical cavity barrier will be inserted at the boundary line between your property and your neighbours` property. The barrier is inserted simply by the installers with little fuss, but crucially it stops any material from encroaching into your neighbours` property.
Q. How much of the house do you do?
We do the all the areas of the house that have living accommodation behind them. All areas of the house that have suitable cavities present are insulated. This includes the gable peaks, but only if the peak area has living accommodation behind it.
Q. Is their much disruption during the installation?
All the work is carried out from outside, with the exception of smoke tests and loft inspections if required. There is little or no disruption inside the house and all the work completed from the outside will be finished off neatly and with as little fuss as possible.
Q. Do I need to do anything before the work commences?
Before the installation commences, ensure all the windows are firmly closed and external doors sealed tightly. If you have valuables on the walls or window-sills it would be wise to remove them as the drilling causes vibration. If household pets are likely to be upset by the noise of drills etc, it may be an idea to move them for a few hours while the work is going on. The same would apply to young children.
Q. Are all your installers trained?
Yes, all the installers are fully trained and carry proof of certification. All installers are trained to the highest standards.
Q. When can we use all the appliances after installation?
You can use all the household equipment immediately. The chimney flues will be tested after completion of the work in order to confirm they are clear. This means the fire can be lit straight away along with the central heating being turned on. There is no settling in period and everything can be used as and when required.
Q. Is their much mess during the installation?
There is a certain amount of dust from the drilling which is unavoidable and a few of the beads may blow away while the job is being installed. After completion, all the dust etc is cleaned and brushed away; the area around the house is washed down and left as clean as possible. It is impossible to say you will be 100% certain of this, but you can assure the customer it will be as clean as humanly possible.
Q. Are there any fumes from the adhesive?
The adhesive is a water- based solvent and does not give off any toxic fumes. The only smell present is the smell of the glue itself, which clears away inside a few hours.
Q. How do you know that the cavity is filled?
If the correct drilling and filling pattern is followed as set out in the installation manuals, the cavity will be completely filled every time. Due to the flow pattern of the bead, and if every hole is injected it is impossible to leave an area unfilled.
Q. If building work is carried out at a later date, will the insulation fall out?
No, due to the bonding of the bead it will not freely fall out. Although because the bead is loosely bonded, it is possible a certain amount of the bead around the disturbed area may come free. This can be overcome by blocking the cavity at the areas being opened with fibreglass.
Q. Will there be holes visible on the outside walls when completed?
Because the Bonded Bead System uses the minimum amount of holes necessary to completely fill the cavity, there will not be an excessive amount of holes drilled. If the mortar gap is wide enough to take the whole drill bit in a brick facing building, then the re-pointed holes will blend in once a little weathering has taken place. If the mortar gap is smaller then the drill bit, it may contact the corner of the brick. If so the re- pointing will become a little more obvious. This should not be a concern, as weathering will eventually make it less obvious. In a house with a dashed finish the re-pointing is usually very successful and blends in well with the original. The main area to point out is in a painted property were the paint has become quite worn. The re-pointing will be obvious until the house is re-painted. This is not undertaken by the installers and should be made clear. Once the house has been re-painted, the holes will blend in successfully.
Q. When will I notice a difference in the house?
A difference in the heat and comfort level should be noticed almost immediately. There should be a noticeable difference in the house even without the heat running.