prospray insulation
thermal spray insulation
Cavity Wall Stabalisation
Solving the problems of Wall-tie Failure and Poor Levels of Insulation using Structural Rigid Polyurethane Foam
Over the last 30 years polyurethane foam has been used to stabilise walls suffering from tie failure. Studies made over the last decade, in conjunction with the Building Research Establishment, have highlighted the problem and have confirmed there are millions of dwellings at risk.
A suitable polyurethane foam system may be injected into a masonry cavity wall by injecting liquid polyurethane through properly spaced holes in the outer leaf. The foam expands in the cavity and sets to become a substantially closed-celled, cross-linked, rigid polyurethane foam which strongly adheres to the inner and outer leaves, so that they become bonded together.
Because of polyurethane’s superior bond strength, the system has been widely used for the restoration of the integrity of cavity walls in which the wall ties have become ineffective due to corrosion. The foam is a satisfactory replacement for normal metal wall ties.
Superior insulation
You can upgrade the thermal performance of a property to meet Building Regulations without the need for expensive, disruptive external cladding. This gives energy savings and reduced CO2 emissions. And because polyurethane expanding foams mould themselves into the fabric of a building, they seal out draughts and reduce air leakage.
Closed cell foams are resistant to driving rain so the foam stays dry with no loss of thermal properties.
Additional stabilisation
Polyurethane stabilises a wall by adhering to the surfaces of the cavity and providing a continuous structural connection between the two leaves. It has the ability to form a good bond with surfaces that are unprepared and in a raw state. The adhesive bond strength is better than 60KN/m2 which is generally in excess of the wind suction likely to occur on the wall.
Remedial mechanical fixing systems using steel bolts or pins rely heavily on a secure fix to the inner leaf. This is often inadequate and sometimes impossible with hollow blocks. It also introduces many more thermal bridges into the structure.
The permanent bond to masonry prevents shrinkage or settlement, which leads to 'cold spots'.
Stabilisation and thermal insulation of cavity walls is covered by a British Standard Code of Practice, BS7456. Additionally, you can contact a BUFCA member for a copy of their BBA Certificate.
Methods of payment
We at prospray believe that insulation shouldnt cost the earth and so we have arranged easy and quick methods of payment.
Finance available subject to status and credit check.
Finance provided by
Prosser Knowles Associates Ltd
Brecknell Chambers
1 Church Street
Kidderminster
DY10 2AD
Telephone:
01562 829 222
Facsimile:
01562 862 195
Available Services: