TAMMELA BECOMES A RENOVATION CENTRE
	Tammela was transformed into an information centre and exhibition space by retrieving the characteristics of a timber building that were lost in the alterations of the 1970s. The lay-out of the building is now that of the alteration plan of 1903. All materials and methods used in the renovation were chosen keeping in mind that they must be available to all builders. During the renovation process some openings and pockets were left in the structures to guide the visitors to the use of traditional materials and suitable renovation methods. Some of these openings display historical phases of Tammela. Most of the actual renovation work was carried out by a carpenter who is an expert on challenging renovations of timber buildings. Some of the work was carried out by students of renovation and employment courses. Also the Regional Renovation Workshop/Old Rauma Renovation Workshop and Innova have participated in the renovation. The renovation of the Tammela house is presented room by room on the following pages. In every room there are openings or pockets that display the history of the building as well as different phases of renovation and recommended repair methods. A cross section of Tammela from 1903 shows the typical structures of a timber building. The foundation is made of natural stone and the timber frame rests upon it. The attic has a board structure.
THE BLUE EXHIBITION ROOM
	The floor of the room has been replaced with a new one in the latest renovation. The material used is tongued and grooved pine board that is 120 mm wide. The boards have been fastened with nails in the groove. The floor has been treated using grey oil glazing paint. The walls have been primed with inexpensive, white wallpaper and papered with an English wallpaper. The border has been especially hand-made for this room. The goal was to find a wallpaper and a border that are suitable for a home of the early 20th century and, on the other hand, for an exhibition room. In this room the selection of the wallpaper was strongly influenced by the remaining old wallpaper on the street side of the room. This wallpaper dates back to the early 20th century, as do the layers of old wallpaper on the opposite wall. Another historical detail on this wall is the old telephone wiring which has been installed as open branching over the wallpaper. The ceiling of the blue exhibition room has been covered with a building board and painted with tempera. The exhibition in this room displays the UNESCO World Heritage. You can learn more about the subject with the help of a CD-rom.
THE RED EXHIBITION ROOM
	The floor of the room has been replaced with a new one. The material used is tongued and grooved pine board that is 120 mm wide. The boards have been fastened with nails in the groove. The floor has been treated using grey oil glazing paint. The walls of this exhibition room have been primed with inexpensive, white wallpaper and papered using an English wallpaper and a Finnish-made border. As in the blue exhibition room, the goal was to find a wallpaper and a border that are suitable for a home of the early 20th century and also for an exhibition room open to the public. The ceiling of the red exhibition room has been covered with a building board and painted with tempera. The oldest remaining timber in Tammela can be found in this part of the house. The old doorway filled with vertical logs shows that alterations have been made in several phases. The low height of the old doorway is explained by the fact that the floor has earlier been considerably lower.

	In the corner where the old fireproof wall has been torn down the key joint of the vertical timber post is displayed. The timber post connecting the timber wall and the brick wall allows the settling of the timber structure while it dries. This room displays timber building and renovation work in Old Rauma. The visitor can touch traditional materials used for insulation and smell the scent of traditional and ecological materials used for repairs.
THE YELLOW OFFICE
	The floor of the yellow office has been replaced with a new one. The material used is tongued and grooved pine board that is 120 mm wide. The boards have been fastened with nails in the groove. The floor has been treated using grey oil glazing paint. In order to show the grains of the wood, a layer of paint with colour pigment has been applied first. This has allowed the wood to absorb the colour pigment. Protective layers without colour pigment has been applied next. In the exhibition rooms a colourless layer has been applied first, which has prevented the absorption of the colour pigment into the wood. The walls have been primed with inexpensive, white wallpaper and papered using a Swedish wallpaper and a Finnish-made border. The ceiling of the yellow office has been clad with tongued and grooved board with a pearl profile. The semi-gloss finish of the ceiling has been achieved by mixing some linseed oil paint with lacquer paint. A historical feature on the wall is a log joint without visible log faces. As the building methods improved around the 1840s, logs were no longer joined with visible log faces. Especially in a case where an internal wall was notched in a solid wall of another room, this was a considerable improvement. The walls became much easier to paper. A breathing base of a building is a traditional floor structure, the advantage of which is good ventilation. When the foundation is high, as in Tammela house, the floor structure can be checked from below.
THE HALL AND THE LOBBY
	Because high wearing qualities are required of the floor of these rooms, a linoleum floor covering was chosen instead of planks. The walls of the hall and the lobby have been clad with tongued and grooved board with a pearl profile. The panelling is over two metres high, which has been typical of public premises such as schools. The panelling in the lobby has been treated imitating hardwood. On the wall opposite the window of the lobby the top part of the panelling shows the different phases of the wood imitation treatment: an untreated surface, a primer coat, a treatment with a fixing agent, wood imitation and finally lacquer. Root beer has been used as a fixing agent. The wall which displays the phases of wood imitation also has a small pocket at the edge of the floor. The pocket displays the worst enemy of a timber building, namely, dry rot. The light coloured, gauzelike layer is dry rot that has dried up. Dry rot has destroyed some of the timber structure already before the alterations of the 1970s. Dry rot destroys wood when the structure is damp and it is, therefore, extremely important to ensure sufficient ventilation in the base of the building. The traditional, breathing base of the building enables the timber structure to stay dry. In the latest renovation the timber structure was allowed to dry and the base of the building was replaced with a new one. Therefore, dry rot can no longer destroy the structures. The top part of the walls of the lobby has been papered with a Finnish-made wallpaper. The panelling in the hall has been painted with lacquer paint and the top part of the wall with distemper. A noteworthy detail in the hall is the coat rack which is an excellent example of skilful carpentry. The ceilings of the hall and the lobby have also been clad with tongued and grooved board with a pearl profile. The ceiling of the hall has been painted with lacquer paint and the treatment on the ceiling of the lobby is wood imitation. There is an opening in the ceiling of the lobby. Through the opening the structure of an old roof truss can be seen. Also visible in the attic are the old boards beneath the roofing. They have been recycled from other old buildings and traces of red ochre can still be seen. Some of these boards are old, grooved roofing boards. On the left-hand side of the window of the hall the joint of the window frame to the timber wall has been left visible. A flat iron is used to attach the window frame to allow the wall structure to settle while it dries. At the end of the hall, some old timber painted with red ochre can be seen above the office door. In the alteration of 1903 a separate timber frame was attached to the main building. The old timber shown above the door is the old external wall of this timber frame. The phases of the painting process can be seen on the old panel door: the cleaning of the surface, the filling of uneven areas, a primer coat, a second coat of paint and a final coat of paint.
THE OFFICE OF THE SOUTH WING
	The office is the only room in Tammela with an old wooden floor that has survived the alterations of the 1970s. The planks have been numbered, taken out and reinstalled after the reinforcement of the floor supporters. Saw dust has been used as additional insulation in the base of the office. In the reinstallation of the floor the planks have been fastened to each other with wooden dowels. Before painting the planks have cautiously been cleaned. The planks have been left convex on purpose. If old floor planks are smoothed, their grain structure is broken. The planks become splintery and are unpleasant to use. The paint used is lacquer paint. A BREATHING BASE OF THE BUILDING floor planks fastened with wooden dowels building paper: tar paper supporting rails insulating layer: saw dust and wood shavings or pulp wool floor supporters old layer of insulation: moss, peat and sand layer of birch-bark boards or planks primary floor beams The walls have been primed with inexpensive, white wallpaper and painted with tinted distemper. For decoration, an old splashing method is used. In order to disguise some of the obliquity of the ceiling, the top part of the walls has been painted with white distemper. To add decoration, a simple marine motif has been stencilled. The ceiling of the office has been covered with a building board and painted with distemper. In the wall opposite the window a timber post connecting the timber wall and the fire proof wall has been left partly visible. The purpose of the post is to join two different structures in such a way that the timber structure can freely settle when it dries. In this case the post connects a timber wall and a brick wall, but there are also other kinds of posts. They are named after the structure to which the timber wall is connected: a door, a window or a fire proof wall. Also displayed in this room is the additional insulation on a timber wall. Softboard is used as additional insulation, because softboard "breathes", as does the timber structure. The natural breathability of the timber structure is thereby retained.
THE KITCHEN
	Some of the alteration of the 1970s, the era of chipboard, can still be seen in the kitchen of Tammela. Here the visitor can see the starting point of the latest renovation. The rear of the kitchen displays the typical material used in the 1970s, namely, chipboard with open joints. The colours, dark brown and white, were also typical of those times. The use of chipboard often caused needless protective casing as the rooms were completely clad. In small rooms, such as this kitchen, a lot of useful space was lost. The suspended ceiling disguised the wiring necessary for lighting. On the kitchen floor the dark brown vinyl floor covering of the 1970s remains. Without removing the chipboard, the lower part of the wall has been clad using tongued and grooved board with a pearl profile and painted with lacquer paint. The top part of the wall has been covered with knot pulp cardboard and painted with tinted tempera.
THE NEGOTIATION ROOM
	The floor planks of the negotiation room have been saved from a villa that has later on been burned off. The planks have been fitted in place and fastened with wood screws. In order to disguise the screws, wooden dowels have been used. The paint used is lacquer paint. The walls have been primed with inexpensive, white wallpaper and papered using a wallpaper and a border chosen from the selection of a Swedish wallpaper factory. The ceiling of the negotiation room has been covered with a building board and painted with distemper. As many as 15 layers of wallpaper were found on the wall of this room. The pocket has been created by cautiously removing the layers of wallpaper one by one with the help of a spray bottle. The original building board is still in its place and the wallpapers have not been transferred here from elsewhere. All these wallpapers have been hung after the alteration of 1903. The latest layers date back to the late 1960s, to the time of the last tenants of the house. In six decades the walls have been papered 15 times, which is surely more often than in the homes of today. The frequent papering of the walls is partly explained by the fact that wood heating caused blackening of the walls. On the other hand, new tenants may have wanted to hang new wallpapers as they moved in. In the street side corner of the room additional insulation of the timber wall is displayed. Blown pulp wool and softboard are visible in the pocket. In the past this room has been a baking room with a large baking oven in the corner. The charred timber wall tells of the fire hazard that lurked behind the furnace. In this case, fortunately, the timber wall has only been charred. Later on the wall has been partly tidied by carving. In the corner of this room there is a half of a tiled stove built for exhibition purposes. The cross section of the white stove displays the circulation system of the furnace. The combustion gas rises from the furnace and bends down along the flues on both sides of the furnace. The combustion gas then goes underneath the furnace and further up the rearmost flue which leads up to the chimney. A tiled stove is taken apart by pouring water over it, as clay mortar dilutes in water. To be able to rebuild the stove, the tiles must be numbered. Horizontally, the tiles are marked with consecutive numbers and vertically, the courses of tiles are marked with consecutive letters, starting from the bottom course. The cross section of the stove also displays the wire tie that must be noted when taking the stove apart. Lead-covered electronic wiring can be seen in the wall opposite the window. The wiring has been inserted in the timber wall and it represents the alteration of the 1940s.
THE LIBRARY
	The floor planks of the library have been saved from a villa that has later on been burned off. The planks have been fitted in place and fastened with wood screws. In order to disguise the screws wooden dowels have been used. The paint used is lacquer paint. The walls have been primed with inexpensive, white wallpaper and papered using a Finnish-made wallpaper and border. The ceiling of the library has been covered with a building board and painted with distemper. The dilapidated stove has been renewed by skilful marbling, the phases of which can be seen in a small area: a primer coat, a mixture of beer and colour pigment, treatment with a natural sponge, and finally lacquer. The marble-like image is created with a fine brush.
THE TOILETS	In the toilets the vinyl floor covering of the 1970s remains. The lower parts of the walls have been clad with tongued and grooved board with a pearl profile and painted with lacquer paint. The top parts of the walls have been covered with knot pulp cardboard and painted with lacquer paint. The ceilings have been clad with tongued and grooved board and painted with lacquer paint.
THE PORCH
	The vinyl floor covering of the 1970s remains. The walls and the ceiling of the porch have been clad with tongued and grooved board and painted with lacquer paint.