Sanitation of buildings with ”Boletice” curtain walls

Technical procedure of work execution:

Selected sequence of operations depends on the condition of the building construction, access to curtain wall in view of the executed works and the extent of works demanded by the building owner. After the removal of external glass facade it is possible to execute static fixation of the supporting beams for the ”Boletice” panels. (Additional anchorage, removal of rust on the construction, protective paint etc.) According to the need it is possible to exchange or leave windows in the facade.

The system offered by our company can be used for newly exchanged wooden, plastic and aluminium windows or adjusted to all types of original windows. The new curtain wall consists of sandwich panels with thermal insulation from PUR, EPS (foam polystyrene) or mineral wool.

The internal surfaces of individual user spaces can be designed and implemented from plasterboard or laminate boards. The second option is more suitable for uninterrupted usage of offices. Internal surfaces can be completed with a new parapet and cable trough below the parapet for the distribution of electricity.

What are the advantages of this sequence of operations:

annual saving of energy up to 30 %
curtain wall does not burden the load-bearing structure – it is not necessary to execute additional footing along the building line
fast assembly of the curtail wall in vertical bands in conformation with agreement with investor (coordination of vacating individual areas)
preservation of natural structuring and plasticity of facade
usage of sandwich panels enables to choose any colour version of the curtain wall
elimination of wet processes
original load bearing construction and mineral insulation is used
minimum limitation of internal areas (aprx. 1 day entry to office)
possibility of operation in unlimited areas during the construction (server room,...)
possibility of implementation from platforms
decreased requirements for manipulation area
preservation of identical internal areas of offices – it is not needed to reconstruct the heating system

Financial expenses:

Financial costs depend on:

shape of the building and the possibility of access to the building, manipulation with material
selected lifting means – lifting platforms, suspended platforms, scaffold
type of heating – used thermal insulation, thickness of insulation, colour of panels and manufacturer
selected windows – type of frames, colour scheme, quality of glazing, type of opening
type of internal surface

Price for m2 of front surface includes:

sandwich panel of selected colour according to RAL scales
metal sheets used for cover rails and vertical connections window/panel – varnished steel sheet
new plastic window – all-edge fittings, glass Ditherm with decreased coefficient of heat carrying capacity U=1,1 W/m2K
internal plastic parapet
execution of internal surface of facade from laminate curtain walls
disassembly of parts of existing curtain walls, waste liquidation, transport
assembly platforms or lifting operating platforms
insurance of building, construction area facilities, safety and health protection training

PUR filling
(solid polyurethane foam with closed cells – without CFC / HCFC (freons))

	Coefficient of heat carrying capacity UP	% of growth of Up
Original sheath („boletice“ panel)	0,768 W / m²K	---
e.g. Kingspan thickness 60 mm	0,320 W / m²K	140,0 %
e.g. Kingspan thickness 80 mm	0,271 W / m²K	183,4 %
e.g. Kingspan thickness 100 mm	0,235 W / m²K	226,8 %

MIN filling
((mineral fibre with high specific weight – fire resistance longer than 45 minutes))

	Coefficient of heat carrying capacity UP	% of growth of Up
Original sheath („boletice“ panel)	0,768 W / m²K	---
e.g. Kingspan thickness 80 mm	0,317 W / m²K	142,3 %
e.g. Kingspan thickness 100 mm	0,279 W / m²K	175,3 %

Filling EPS
(stabilised foam polystyrene – shape stability up to 85°C)

	Coefficient of heat carrying capacity UP	% of growth of Up
Original sheath („boletice“ panel)	0,768 W / m²K	---
e.g. Kingspan thickness 80 mm	0,325 W / m²K	136,3 %
e.g. Kingspan thickness 100 mm	0,287 W / m²K	167,6 %
e.g. Kingspan thickness 120 mm	0,256 W / m²K	200,0 %
e.g. Kingspan thickness 140 mm	0,232 W / m²K	231,0 %

Note 1.: Specified values RN (m2K/W) and U (W/m2.K) are not affected by the filling constructions because their ratio of surfaces and the quality of filling constructions is individual for every building. These values serve as the basis for the calculation of total coefficient of heat carrying capacity.

Note 2.: Percentage increase shows the % of increased thermal resistance of the construction compared to the original sheath from ”Boletice” panels.